JP2003143391A - Medium printed with electronic watermark, electronic watermark printer, electronic watermark detector, electronic watermark print method, and electronic watermark detection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medium in which an electronic watermark is printed, an electronic watermark printer, an electronic watermark detector, an electronic watermark print method, and an electronic watermark detection method that also have a falsification prevention effect by an electronic watermark while maintaining a conventional physical falsification prevention effect and use a printer on market to simply issue a card and a ticket with a highs security level. SOLUTION: An electronic watermark is inserted to a card or a ticket 7 by utilizing a wide area in a pattern or a background. For example, issuer secret information, a purchaser code, a seller code, or a reservation number is used for information inserted as the electronic watermark.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium printed with a digital watermark, a digital watermark printing apparatus, a digital watermark detection apparatus,
The present invention relates to a digital watermark printing method and a digital watermark detection method.

[0002]

2. Description of the Related Art Conventionally, as means for preventing forgery of printed matter such as cards, cash vouchers, and tickets, special intaglio printing, line moire, invisible ink, holograms, etc. relying on physical manufacturing difficulties Was the most. However, this method has a problem that the anti-counterfeiting effect is lost when the forger can obtain the manufacturing technology and can forge it.

In recent years, hologram seals and IC cards have become effective methods for preventing counterfeiting of cards, but a dedicated printing / manufacturing apparatus is required, which increases costs and delays delivery. There's a problem. Also, IC
Cards and the like are not suitable for disposable cash vouchers and tickets.

On the other hand, in recent years, a technique called digital watermark has been developed and attracts attention. Digital watermarking is a technique for embedding information such as numbers and characters in digital multimedia data such as images and voices that cannot be seen from the outside, and is effective for copyright protection of digital contents.

However, the digital watermark technology capable of handling digital contents has a problem that the digital watermark is not detected when developed on an analog medium such as a printed matter.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a tampering prevention effect by a digital watermark while maintaining the conventional physical forgery prevention effect, and further, is commercially available. A digital watermark-printed medium, a digital watermark printing device, a digital watermark detection device, a digital watermark printing method, and a digital watermark detection method that enable the issuance of cards and tickets with a high security level easily using the printer of The purpose is to provide.

[0007]

According to the structure of the present invention,
A digital watermark is embedded in a tint block or background pattern of a medium such as a card or ticket. As a result, a large amount of digital watermark information and a large amount of redundant components are included in a wide range of tint block and background patterns, and read failures are reduced. Therefore, it is not necessary to prepare a special ticket paper or the like for preventing forgery, and a plain paper printer can be used. In addition, there is no need to store and manage special ticket papers to prevent counterfeiting. Also. The cost of issuing tickets such as tickets can be reduced.

Further, the present invention is characterized in that the digital watermark is inserted in a repeating pattern. According to the above configuration, the digital watermark included in the tint block or the background pattern is used as the repeated pattern. As a result, a large amount of redundant components can be added, and failure in reading the digital watermark is reduced. Therefore, a plain paper printer can be used. In addition, there is no need to store and manage special ticket papers to prevent counterfeiting.

Further, according to the present invention, a character or an image is independently printed or both the character and the image are printed as a front pattern on the surface of the medium in which the digital watermark is embedded in the tint block or the background pattern. It is characterized by According to the above configuration, in addition to embedding a digital watermark in a background pattern or background pattern of a card or ticket, character information for identifying the ticket is printed on the front surface of the ticket.
As a result, the electronic watermark information of the background pattern can be compared with the character information of the ticket or the like, and the validity of the ticket or the like can be easily confirmed.

Further, the present invention is characterized in that information specified by a publisher of the medium is embedded as a digital watermark in the front pattern. According to the above configuration, according to the configuration of the present invention, information specified by the publisher of the medium is further embedded in the front pattern as a digital watermark. As a result, the information of the digital watermark embedded in the front pattern and the face information can be collated to improve the security level.

Further, according to the present invention, the electronic watermark information inserted in the background pattern or the electronic watermark information inserted in the front pattern and the character information printed as the front pattern are collated. The digital watermark according to claim 3 or claim 4 is associated with the medium. According to the above configuration, the digital watermark information inserted in the background pattern,
It is related so that it can be collated with the character information printed as the front pattern. For example, the same "reservation number" is used. As a result, the information of the electronic watermark embedded in the background pattern or the front pattern can be collated with the face information, and the validity of the ticket can be easily confirmed.

Further, the present invention is characterized in that, as the information of the digital watermark, secret information of a ticket issuer which can be known only by an issuer of the medium and unique information which can uniquely identify the medium to be issued are used. . According to the above configuration, as the digital watermark information, the ticket issuer secret information that can be known only by the medium issuer and the unique information that can uniquely identify the medium to be issued are used. As a result, the information of the digital watermark embedded in the front pattern and the face information can be collated to improve the security level. As a result, the ticket issuer's secret information and the digital watermark information are compared, and the security level can be greatly improved.

According to the present invention, a printing medium including at least a card and a ticket is printed with a background pattern in which digital watermark information of lot-specific information is embedded, and a character or an image is further printed on the background pattern. Is printed independently, or a front pattern consisting of both characters and an image is printed, and individual unique information for uniquely identifying the medium is embedded as digital watermark information in the front pattern. According to the above configuration, on the ticket or the like on which the background pattern in which the digital watermark of the unique information for each lot is embedded is printed in advance, print the front pattern including the characters or images independently or both the characters and the image. Further, unique information that uniquely identifies a ticket or the like is embedded as a digital watermark in this front pattern.
As a result, first, it is possible to obtain a physical forgery prevention effect that it is difficult to obtain a sheet, and a double forgery prevention effect can be achieved by the digital watermark of the front pattern.

The present invention is also characterized in that the front pattern is character information, and the character information and digital watermark information embedded in the front pattern are associated with each other for matching. According to the above configuration, the configuration of the present invention makes it possible to collate the electronic watermark information embedded in the background pattern of a medium such as a card or a ticket with the character information printed on the ticket face. As a result, the information of the electronic watermark embedded in the background pattern or the front pattern can be collated with the face information, and the validity of the ticket can be easily confirmed.

Further, according to the present invention, as the information of the digital watermark to be embedded in the front pattern, secret information that can be known only by the medium issuer and unique information that can uniquely identify the medium to be issued are used. And According to the above configuration, as the digital watermark to be embedded in the front pattern of the medium such as a card or a ticket, secret information that only the publisher of the medium can know and unique information that can uniquely identify the medium to be issued are used. As a result, the ticket issuer's secret information and the digital watermark information are compared, and the security level can be greatly improved.

According to a third aspect of the present invention, a digital watermarked background in which predetermined information designated by an issuer of the medium is embedded as digital watermark information in a tint block or background pattern of the medium including at least a card or a ticket. A digital watermarked image data generating means for generating image data;
A print output data generating unit for generating print output data for printing the digital watermarked background image data on a medium; and a printing unit for printing the print output data on the medium. .

According to the above arrangement, a digital watermark is embedded in the tint block or background pattern of a medium such as a card or ticket. As a result, a large amount of digital watermark information and a large amount of redundant components are included in a wide range of tint block and background patterns, and read failures are reduced. Therefore, it is not necessary to prepare a special ticket paper or the like for preventing forgery, and a plain paper printer can be used. In addition, there is no need to store and manage special ticket papers to prevent counterfeiting. Also. The cost of issuing tickets such as tickets can be reduced.

Further, the present invention is the digital watermark printing apparatus according to claim 7, further comprising means for repeatedly inserting a pattern as the digital watermark information. According to the above configuration, the digital watermark embedded in the tint block or the background pattern is used as the repetitive pattern. As a result, a large amount of redundant components can be included, and the failure of reading the digital watermark is reduced. Therefore, a plain paper printer can be used. In addition, there is no need to store and manage special ticket papers to prevent counterfeiting.

Further, the invention according to claim 4 generates second print output data for printing characters or images independently on a medium including at least a card or a ticket, or for printing both characters and images as a front pattern. And a second printing unit that prints the second print output data on a medium. According to the above configuration, in addition to embedding a digital watermark in a background pattern or background pattern of a card or ticket, character information for identifying the ticket is printed on the front surface of the ticket. As a result, the electronic watermark information of the background pattern can be compared with the character information of the ticket or the like, and the validity of the ticket or the like can be easily confirmed.

Further, the invention according to claim 5 further comprises a second digital watermarked image data generating means for embedding predetermined information designated in advance by a ticket issuer as digital watermark information in the second print output data. It is characterized by having. According to the above configuration, information specified by the medium issuer is further embedded in the front pattern as a digital watermark. As a result, the information of the digital watermark embedded in the front pattern and the face information can be collated to improve the security level.

Further, the present invention is characterized by further comprising means for previously encrypting the information to be embedded as the digital watermark by using an encryption key. According to the above configuration, the information used as the digital watermark is encrypted in advance using the encryption key. As a result, even if the digital watermark information is known to a third party, it cannot be easily forged, and a card or ticket with a further improved security level can be easily printed with a plain paper printer or the like.

Further, the present invention is characterized by further comprising passphrase input means for accepting a passphrase input by a user, and means for generating an encryption key from the passphrase. According to the above configuration,
An encryption key used when encrypting information to be embedded as a digital watermark is generated based on a passphrase input by the user. This makes it possible to easily issue a ticket or card having a remarkably high security level even with a plain paper printer or the like.

According to a sixth aspect of the present invention, there is provided a digital watermark printing apparatus for printing a background pattern of a printing medium including at least a card or a ticket,
Digital watermark embedded image data generating means for generating digital watermark embedded background image data in which lot-specific information designated by the medium issuer is embedded as digital watermark information, and print output data generated from the digital watermark embedded background image data And a printing unit for printing the print output data on a printing medium. According to the above configuration, the background image data in which the lot-specific information is embedded as a digital watermark is generated, and the digital watermarked image data is mass-produced at a low cost by a gravure printing machine, an offset printing machine, or the like. As a result, first, a physical forgery prevention effect that paper is difficult to obtain can be achieved.

According to the invention of claim 7, there is provided a digital watermark printing apparatus for printing a background pattern of a printing medium including at least a card or a ticket,
An encryption means for encrypting lot-specific information specified by the issuer of this medium, and a digital watermarked image for generating digital watermarked background image data in which the encrypted lot-specific information is embedded as digital watermark information. It is characterized by comprising data generating means, print output data generating means for generating print output data from the digital watermarked background image data, and printing means for printing the print output data on a printing medium. . According to the above configuration, the background image data in which the encrypted unique information for each lot is embedded as a digital watermark is generated, and this encrypted digital watermarked image data is mass-produced by a gravure printing machine or an offset printing machine. Issue at a low price. As a result, even if the digital watermark information is published or leaked to the outside, the encryption method is unknown, and therefore it cannot be easily forged.

Further, according to the invention of claim 8, a character or an image is provided independently or as a character and an image on a medium on which a background pattern in which a digital watermark of unique information for each lot is embedded is preliminarily printed. And a front surface pattern image data generating unit for embedding individual unique information for uniquely identifying a medium in the front surface pattern as a digital watermark, and a printout from the front surface pattern image data. The electronic watermark printing apparatus is provided with a unit for generating data and a unit for printing the print output data on a medium. According to the above configuration, on the ticket or the like on which the background pattern in which the digital watermark of the unique information for each lot is embedded is printed in advance, print the front pattern including the characters or images independently or both the characters and the image. Further, individual unique information for uniquely identifying a ticket or the like is embedded in the front pattern as a digital watermark. As a result, first, it is possible to obtain a physical forgery prevention effect that it is difficult to obtain a sheet, and a double forgery prevention effect can be achieved by the digital watermark of the front pattern.

Further, according to the present invention, a character or an image is formed on a medium on which a background pattern in which a digital watermark of unique information for each lot is embedded is preliminarily printed, and a character or an image is independently formed on the front surface of the medium. A printer for printing a pattern, comprising image scanning means for scanning the surface of a medium to obtain digital image data, and electronic watermark information detecting means for detecting electronic watermark information of lot-specific information from the digital image data. A means for confirming lot-specific information for confirming the validity of the detected digital watermark information, a means for encrypting individual unique information for uniquely identifying a medium, the detected lot-specific information and the encryption Means for generating a digital watermark to be embedded in a front pattern based on the individualized unique information, and generating image data with a digital watermark; Means for generating a print output data from the child watermarked image data, characterized by comprising a means for printing the print output data.

According to the above configuration, the background pattern in which the digital watermark of the encrypted unique information for each lot is embedded is read, and the individual unique information for uniquely identifying the medium is encrypted, and the encrypted individual information is encrypted. Based on the unique information and the read unique information for each lot, a digital watermark to be embedded in the front pattern is generated, and the image data with the digital watermark is printed on a ticket surface such as a ticket. As a result, the legitimacy of a ticket or the like in which the electronic watermark information of the lot-specific information is printed as a background pattern can be confirmed, and the front pattern in which the encrypted electronic watermark is embedded is printed, so the security level is high It becomes possible to issue tickets and cards.

According to a ninth aspect of the present invention, there is provided a digital watermark detecting device for reading digital watermark information embedded in a tint block pattern or a background pattern printed on a medium and character information printed on the medium. An image scanning means for scanning to obtain digital image data, a digital watermark information detecting means for detecting digital watermark information embedded in a tint block or a background pattern from the digital image data, and a digital watermark data printed on a medium from the digital image data. Character detecting means for reading the character information, data collating means for collating the detected digital watermark information with the character information, and output means for outputting the collation result obtained from the data collating means. Is characterized by. According to the above configuration,
Detects digital watermark information embedded in a tint block or background pattern printed on a medium such as a card or ticket, reads character information printed on the surface of the medium, and collates the digital watermark information with the character information, Display the matching result.
As a result, the information of the digital watermark embedded in the tint block, the background pattern, etc. can be collated with the face information, and the security level can be improved. In addition, in order to accurately read the digital watermark information from the printed matter, other digital watermark techniques such as the digital watermark synthesizing method described in Japanese Patent Application No. 2000-248867 invented by the present applicants can be used. preferable.

According to a tenth aspect of the present invention, there is provided a digital watermark detecting device for reading digital watermark information embedded in a tint block pattern or a background pattern printed on a medium, the image being obtained by scanning the medium to obtain digital image data. Scanning means, digital watermark information detecting means for detecting digital watermark information embedded in a tint block or background pattern from the digital image data, and issuing for storing secret information relating to the digital watermark information previously notified by the issuer of the medium. Personal confidential information storage means, data collating means for collating the detected digital watermark information with the secret information, and output means for outputting the collation result obtained from the data collating means. To do. According to the above configuration, the electronic watermark information is detected from the tint block or the background pattern printed on the medium, and the electronic watermark information is collated with the confidential information relating to the electronic watermark notified in advance by the issuer of the medium. As a result, the issuer confidential information and the digital watermark information are collated, and the security level can be greatly improved.

The present invention also provides a digital watermark detecting device for reading a tint block or background pattern printed on a medium, encrypted digital watermark information embedded in the pattern, and character information printed on the medium, Image scanning means for scanning the surface of the medium to obtain digital image data, digital watermark information detecting means for detecting encrypted digital watermark information from the digital image data, and notification from the card or ticket issuer in advance. Means for storing secret information and encryption key information relating to the digital watermark, character detection means for reading character information printed on the surface of the medium from the digital image data, combining the character information and the secret information, and An encryption unit that encrypts as unique information using the encryption key, the encrypted unique information, and the electronic transparency. Means for collating the electronic watermark information that has been encrypted obtained by the information detecting means, characterized by comprising a means for displaying the collation result.

According to the above configuration, the encrypted digital watermark information printed on the medium such as the ticket or the card is detected, and the confidential information and the encryption key information regarding the digital watermark notified in advance by the issuer of the medium are detected. The character information read from the surface of the medium is stored, the secret information is combined, and further encrypted using the encryption key as unique information. The encrypted unique information and the encrypted digital watermark Match information. As a result, it becomes possible to read a medium in which three steps of counterfeiting prevention measures of digital watermark, secret information, and encryption key have been performed, so that even if the information of the digital watermark is known to a third party, it is easy to forge. Will not be possible, and you can use cards and tickets with an even higher level of security.

The present invention is also characterized in that the encryption key is generated based on a passphrase input by a user. According to the above configuration, the encryption key used when detecting the digital watermark is generated based on the passphrase input by the user. As a result, tickets and cards having a remarkably high security level can be easily issued and used even with a plain paper printer or the like.

According to the eleventh aspect of the invention, lot-specific information which is digital watermark information in a background pattern printed on a medium including at least a card or a ticket and digital watermark information in a front pattern. Is a digital watermark detection device for reading the individual unique information, and image scanning means for scanning a medium to obtain digital image data, and digital watermark information in a background pattern from the digital image data. Background pattern digital watermark reading means for detecting lot-specific information, lot-specific information confirmation means for confirming the validity of the detected lot-specific digital watermark information, and a front pattern from this digital image data Front pattern electronic watermark reading means for detecting individual unique information which is the electronic watermark information therein, Individual unique information confirmation means for confirming the validity of the electronic watermark information of the issued individual unique information, collating means for collating the lot-specific information with the individual unique information, and collation obtained from the collating means And an output means for outputting the result.

According to the above construction, the encrypted digital watermark of the lot-specific information embedded in the background pattern of the medium such as a ticket or card is read, its validity is confirmed, and the watermark is embedded in the front pattern. The electronic watermark of the encrypted individual unique information is read, its validity is confirmed, and the lot-specific information is compared with the corresponding data in the individual unique information. This makes it possible to issue and use tickets and cards that have a significantly high anti-counterfeiting effect.

According to a twelfth aspect of the present invention, a digital watermarked background in which predetermined information designated by the publisher of the medium is embedded as digital watermark information in a tint block or background pattern of the medium including at least a card or a ticket. Digital watermark embedded image data generation procedure for generating image data, and print output data generation procedure for generating print output data for printing the digital watermark embedded background image data generated by the digital watermark embedded image data generation procedure And a printing procedure for printing the print output data on this medium.

According to a thirteenth aspect of the present invention, there is provided a digital watermark printing method for printing a background pattern of a printing medium including at least a card or a ticket, which is unique to each lot designated by an issuer of the medium. Digital watermark embedded image data generation procedure for generating digital watermark embedded background image data in which information is embedded as digital watermark information, print output data generation procedure for generating print output data from the digital watermark embedded background image data, and the print output And a print procedure for printing the print output data generated in the data generation procedure on a printing medium.

Further, the invention according to claim 14 is characterized in that a character or an image is independent or composed of both the character and the image on a medium on which a background pattern in which electronic watermark information of lot-specific information is embedded is preliminarily printed. A digital watermark printing method for printing a front pattern, comprising: embedding individual unique information for uniquely identifying a medium in the front pattern as digital watermark information to generate digital watermarked front image data. Image data generation procedure, second print output procedure for generating second print output data from the digital watermarked front image data, and second print output data generated by the second print output procedure And a printing procedure for printing on a medium.

According to a fifteenth aspect of the present invention, there is provided a digital watermark detection method for reading digital watermark information embedded in a tint block pattern or a background pattern printed on a medium and character information printed on the medium. An image scanning procedure for scanning to obtain digital image data, a digital watermark information detection procedure for detecting digital watermark information embedded in a tint block or a background pattern from the digital image data, and a digital watermark information printed on a medium from the digital image data. Character detection procedure for reading the character information, a data matching procedure for matching the detected digital watermark information with the character information, and an output procedure for outputting a matching result obtained from the data matching procedure. ..

[0039]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

[Outline] FIG. 1 is a diagram for explaining a model for preventing forgery of a card and a ticket according to the present invention, and is a diagram for explaining an example of issuing a card or a ticket 7 at a convenience store 1 or the like. . The outline of the operation in the model shown in FIG. 1 will be described below. In addition, in FIG. 1, a case where the ticket 7 is used will be described.

-Ticketing information DB such as ticketing center
"Ticketer confidential information" recorded in (database) 6,
"Buyer code", "Seller code", "Reservation number",
Ticket issuance information such as “date” is transmitted to the ticket output device 3 provided in the convenience store 1 via the network 2. In the ticket output device 3, the background image data is retrieved from the background image database 4 in which the background image data is registered, and the background image data contains electronic watermark information in the background image data.
For example, information such as "ticket issuer secret information", "purchaser code", "seller code", "reservation number", and "date" are embedded, and a background image (or tint block) is printed on the face of the ticket 7 by the plain paper printer 5. ) Is printed. Further, on the face of the ticket 7, the "event contents" display, "purchaser code", "seller code", "reservation number", "date", etc. are printed at the same time. For the reading and verification of the ticket 7, for example, the ticket 7 is read by the digital camera 8a or the hand scanner 8b at the entrance gate of the event site, converted into digital data, and read on the display screen of the digital watermark detection device 9 "Information" is displayed, and an attendant at the entrance gate visually collates the "digital watermark information" displayed on the digital watermark detection device 9 with the information printed on the face of the ticket 7. Alternatively, the "information printed on the face of the ticket" is read by an automatic face character recognition device (OCR or the like), the "information printed on the face of the ticket" is collated with the "digital watermark information", and the collation result is detected as a digital watermark. Display on the device 9. Furthermore, the discoverer secret information database 10 in which the ticket issuer secret information is recorded in advance is provided in the electronic watermark detection device 9 and collated with the ticket issuer secret information embedded in the electronic watermark information printed on the ticket 7. You can also

By using the ticket counterfeiting prevention model described above, the plain paper printer 5 can be used at the convenience store 1 or the like.
This makes it possible to issue a highly secure card or ticket 7. In this way, cards and tickets issued using the present invention can be applied to the following fields.・ Cards: point cards for retail stores, point cards for amusement facilities, prepaid cards ・ Tickets: sports watching tickets, theater tickets, music tickets, etc. ・ Vouchers: airplane coupons, Shinkansen tickets, lottery tickets

[About Digital Watermark Encryption and Message Digest (MD)] In the present invention, a higher security level can be set by encrypting digital watermark information. That is, even if the method of embedding the digital watermark information is publicized or known to an outsider by performing encryption,
It is possible to prevent the same digital watermark information from being inserted.

(1) In the present invention, as an encryption method,
In addition to using the general encryption method that uses a "cryptographic key", you can also use a method that generates a fixed-length pseudo-random number from a given plaintext (phrase or password) using a "hash function". it can. In this specification, the pseudo random number generated by the “hash function” is called “message digest (MD)”. In addition, there are two types of methods for generating a message digest (MD), that is, a case where an “encryption key” is used and a case where the “encryption key” is not used. In the present invention, either method can be used. FIG. 2 is a diagram for explaining a method for generating a message digest (MD), and FIG. 2 (a) shows an example in which an “encryption key” and a “keyed hash function” are used. Using the encryption key 11b and the hash function with key 11c, the information (plaintext) 11a is converted to the message digest with key (M
D) Generate 11d. Further, in FIG. 2B, the keyless hash function 12b is used to generate a keyless message digest (MD) 12c from the information (plaintext) 12a. By using this "encryption key", information cannot be easily leaked to an external third party, and forgery can be prevented. The message digest (MD) can be added to the information to be recorded and used to prevent information reading error.

(2) FIG. 3 is a first diagram for explaining the encryption method and the decryption method, and is an example of the case where a general "encryption key" is used. FIG. 3A is a diagram showing an example of encryption. Information (plaintext) 13a (for example, ticket issuing information) to be embedded as digital watermark information is provided as an encryption key 13b and an encryption means 13c.
The encrypted information (ciphertext) 13d is generated by using it. Then, the electronic watermark embedding unit 13e embeds the encrypted electronic watermark information 13f as electronic watermark information in the tint block or background pattern that is the background image data 13f printed on the face of a ticket or card. As a result, the electronic watermark embedding unit 13e generates the background image data 13g in which the electronic watermark information is embedded. FIG. 3B is a diagram showing an example of decryption. Digital watermark (ciphertext) information 14a printed on a background pattern such as a ticket or a tint block is read by the digital watermark reading means 14b, and the read information ( The ciphertext) 14c is decrypted by the encryption key 14e and the decryption means 14d to obtain the information (plaintext) 14f. On the other hand, the character or image 14g printed on the face of a ticket or the like is read by the character detecting means 14h to obtain face information 14k. And collating means 14n
Thus, the information 14f obtained from the digital watermark information and the face information 14k are collated.

(3) FIG. 4 is a second diagram for explaining the encryption method and the decryption method, which is an example of the case where the “keyed hash function” is used. FIG. 4A is a diagram showing an example of encryption, in which information (plaintext) 15a to be embedded as a digital watermark (for example, ticket issuing information) is encrypted using an encryption key 15b and a hash function with key 15c. The converted information (message digest (MD)) 15d is generated. Then, the digital watermark embedding means 13e embeds the information (MD) 15d as digital watermark information (message digest (MD)) in the tint block or background pattern printed on the ticket face of the ticket or card. 15e generates the background image data 15f in which the digital watermark information (MD) is embedded in. ・ FIG.4 (b) is a figure which shows the example of decoding, The digital watermark printed on the background pattern and tint block of a ticket etc. The information (message digest (MD)) 16a is read by the electronic watermark reading means 16b to obtain the information (message digest (MD)) 16c, while the characters and images 16d printed on the face of a ticket or the like are detected by the character detecting means. The read ticket surface information 16f is obtained by 16e.
Then, using the encryption key 16g and the hash function with key 16h, the face information (MD) 16k of the message digest (MD) is obtained from the face information 16f. Then, the collating means 16n and the information (MD) 16c obtained from the electronic watermark information 16a and the face information (M
D) Check with 16k. By using this message digest, the amount of digital watermark information can be reduced.

(4) FIG. 5 is a diagram showing an example of a case where an "encryption key" is generated from a passphrase (generally a long character string or symbol string rather than a password). -In FIG. 5 (a), unique information of each card and ticket (for example, "ticketer confidential information", "purchaser code",
From the ticket issuing information in which "seller code", "reservation number", "date", etc. are combined), a message digest using the common key encryption CBC mode is created using the encryption key 17 (step S1). This message digest is embedded as digital watermark information in a tint block or background pattern that is background image data (step S2). FIG. 5B shows a method of generating an encryption key, which is a passphrase determined by a card or ticket user (user) (generally, a long character string or symbol string rather than a password).
Is safer, for example, PKCS (Public-
Key Cryptography Standards) # 12 is used to generate the encryption key 14 (step S).
3). By this method, if the encryption key 14 is generated from the information that only the user of the card or ticket can know, it is possible to exclude the use of the forged card or ticket by anyone other than the user himself. Also, it is not necessary to store the encryption key in a specific location.

(5) Further, in the present invention, a message digest (MD) can be used to prevent reading error of digital watermark information. In the specification,
A message digest (MD) for preventing reading error of digital watermark information is referred to as "unique MD". Figure 6
6A and 6B are diagrams for explaining a method of using a unique MD for a digital watermark. FIG. 6A is an example when digital watermark information is embedded, and FIG. 6B is an example when digital watermark information is read. Shows. When the digital watermark information shown in FIG. 6A is embedded, a unique MD 18c is generated from a unique information (or encrypted unique information) 18a such as ticket issuing information by a keyed or non-keyed hash function 18b. To do. Then, by the combining means 18d, the unique information 18a and the unique M
D18c is combined to obtain the digital watermark unique information 18e, and the digital watermark embedding unit 18f embeds the digital watermark unique information 18e as digital watermark information in the background image data 18g such as the background pattern of the ticket. When reading the digital watermark information shown in FIG. 6B, the digital watermark reading means 19a reads the digital watermark information on the face of the ticket to obtain the digital watermark unique information 19b. The electronic watermark unique information 19b is decomposed into the decomposing means 19c.
To separate the unique information 19d and the unique MD 19e.
Hash function with or without key 1 from unique information 19d
The unique MD 19g is calculated from 9f. Then, the calculated unique MD 19g and the digital watermark unique information 19b
The unique MD 19e extracted from is matched by the matching means 19h. As a result, it is possible to confirm whether the decrypted unique information has an error and prevent the information from being illegally tampered with.

[First Embodiment] FIG. 7 is a block diagram showing a basic configuration example of a ticket output device according to the present invention, showing an example in the case where a digital watermark information encryption means is not used. There is.

Each means shown in FIG. 7 has the following functions. The digital watermarked image data generating means 21 is, for example,
Background image with digital watermark embedded in the background image data to be printed on the ticket with ticket issuing information such as "ticket issuer confidential information", "buyer code", "seller code", and "reservation number" as digital watermark information. It is a means of generating data. The character image generating means 22 is means for generating character image data to be printed on the face of a ticket. As this character information, information for specifying "event contents" and ticket issuing information such as "purchaser code", "seller code", and "reservation number" are used. Further, the characters or images printed on the face of the bill may include a barcode or a two-dimensional barcode. The print output data generation unit 23 is a unit that generates print output data to be actually printed, and synthesizes the background image data with a digital watermark and the character image data to generate print output data. The printing unit 24 is a unit that actually prints the generated print output data by a printer or the like. In the example shown in FIG. 7, both background image data such as a tint block or background pattern in which electronic watermark information is embedded and character image data such as unique information (for example, ticket issuing information) are printed on the face of a ticket or the like. As an example, the printing of the character image data may be omitted, or only the digital watermarked image data may be printed.

FIG. 8 is a processing flow for explaining the operation of the ticket output device 20 shown in FIG. 7. (1) By the digital watermarked image data generating means 21,
Ticket issuing information (unique information) of "ticketer secret information 30", "purchaser code 31", "seller code 32" and "reservation number 33" as digital watermark information, and "background image data" as a background image. 34 ”, the digital watermarked background image data 35 is generated (step S1).
1). (2) Further, the character image generating means 22 is used to issue ticket purchase information “purchaser code 31” and “seller code 3”.
The character image data 37 is generated from the information of "2" and "reservation number 33" and the information of "other face print data 36" which is also ticket issuing information (step S1).
2). It should be noted that the characters or images printed on the face of the bill may include a barcode or a two-dimensional barcode. (3) The print output data generation means 23 generates print output data 38 to be actually printed from the digital watermarked background image data 35 and the character image data 37 (step S13). (4) The printing unit 24 prints the electronic watermark information-containing ticket 39 based on the print output data 38 (step S14). The electronic watermark information-containing ticket 39 created in this way is read by an electronic watermark detection device installed in a ticket reception gate of a baseball field, for example, and the electronic watermark information read and printed on the ticket face. The character information is visually confirmed by the staff.

FIG. 9 is a block diagram showing a specific example of the configuration of the ticket output device shown in FIG. 8, and shows only the portion directly related to the present invention. Figure 9
In the figure, 50 is a ticket reservation center for instructing ticket issuance, 50 a is a server of the ticket reservation center, 51
Is a ticket reception gate such as a baseball field, 51a is a digital watermark detection device for the ticket reception gate, 52 is a network, 60 is a convenience store, 61 is a ticket output device, 62 is a communication interface for connecting the network and the ticket output device 61, 63 is a control unit for controlling the entire ticket output device 61, 64 is a database, 7
Reference numeral 0 indicates a processing program section.

In the database 64, "ticketer secret information 30", "purchase code 31", "seller code 3"
2 "," Reservation number 33 "," Other face print data 3 "
Ticketing information such as "6", "date", and "background image data 34" are recorded.

Further, the processing program section 70 includes the following processing sections. The digital watermarked image data generation processing unit 71 stores the “ticket issuer secret information 30”, the “buyer code 31”, the “seller code 32”, the “reservation number 33”, the “other face print data 36”, This is a processing unit for generating digital watermark information from ticket issuing information, embedding it in the “background image data 34”, and generating the digital watermarked background image data 35. The character image generation processing unit 72 is a processing unit that generates the character image data 37 including characters and images to be printed on the face of a ticket. The characters and images are "Purchaser code 3
Information such as "1", "seller code 32", "reservation number 33", etc., and "other face print data" for specifying the event content are used. The print output data generation processing unit 73 is a processing unit that generates print output data to be actually printed, and combines the digital watermarked background image data 35 and the character image data 37 to generate print output data 38. To do. The print processing unit 74 is a processing unit that actually prints the ticket 39 based on the print output data 38 with a commercially available printer or the like.

The processing program section 70 may be realized by dedicated hardware, and the processing program section is composed of a memory and a CPU (central processing unit) which are one of storage means. Alternatively, a program (not shown) for realizing the function of the processing unit may be loaded into the memory and executed to realize the function. In addition, it is assumed that the ticket output device 61 is connected to peripheral devices such as an input device and a display device (none of which is displayed). Here, the input device refers to an input device such as a keyboard and a mouse. A display device is a CRT (Cathode
Ray tube) and liquid crystal display devices.

Further, FIG. 10 shows a digital watermark detection apparatus 80.
FIG. 10 is a block diagram showing a configuration example of the above, which is a device for reading a ticket issued by the ticket output device shown in FIGS. 7 to 9, and shows only a portion directly related to the present invention. Each means shown in FIG. 10 has the following functions. The image scanning unit 81 is, for example, a digital camera or a handy scanner, and is a unit that obtains digital image data by reading information of characters and images printed on the face of a ticket such as a ticket and digitizing the information. The electronic watermark information detecting means 82 is means for extracting electronic watermark information from the read digitized digital image data. The character detecting means 83 is means for detecting character information from the digital image data obtained by digitizing the bill surface read by the image scanning means 81. The ticket issuer secret information storage means 84 is a means for storing “ticket issuer secret information” notified in advance by the issuer of a ticket in a predetermined storage means (memory, hard disk, etc.). The data collating means 85 collates the character information detected by the character detecting means 83 with the corresponding data of the digital watermark information detected by the digital watermark information detecting means 82, and at the same time, the "ticketer secret information" in the digital watermark information. ], "Ticketer confidential information" stored in the ticketer confidential information storage means 84
It is a means of matching and. By this means, it is possible to confirm whether fraud has been committed. The display means 86 is a CRT or a liquid crystal display device,
It is a means for displaying the collation result in the data collating means 85.

FIG. 11 is a processing flow for explaining the operation of the digital watermark detection apparatus 80 shown in FIG. 10, and the processing flow will be described below. (1) The image scanning means 81 scans the electronic watermarked ticket 90 to obtain digitized ticket face image data 91 (step S21). Further, electronic watermark information is detected from the face image data 91 (step S2
2) Further, character information is detected (step S23). As the electronic watermark information, for example, "ticketer secret information 9
2 "," Buyer code 93 "," Seller code 94 ",
A "reservation number 95" or the like is obtained, and as the character information, for example, "buyer code 93", "seller code 94",
"Reservation number 95" and "Other face print data 9"
6 ”or the like is obtained. (2) The data collating means 85 collates the character information with the corresponding data of the electronic watermark information, and the "ticket issuer secret information 92" of the electronic watermark information and the ticket issuer secret information storage means 84 determine the predetermined storage means. It collates with the "ticket issuer secret information" stored in (step S24). (3) The collation result is output and displayed on the display means 80 such as a CRT or a liquid crystal display device (step S25).

FIG. 12 is a block diagram showing a concrete example of the configuration of the digital watermark detection apparatus shown in FIG.
Only the portions directly related to the present invention are shown. In FIG. 12, 101 is a ticket reservation center for instructing ticket issuance, 101a is a server of the ticket reservation center, 102 is a convenience store, 102a is a ticket output device of the convenience store, 103 is a network, 110 is a ticket reception such as a baseball field. A gate, 111 is a digital watermark detection device, 112 is a communication interface that connects the network 103 and the ticket output device 111, 113 is a control unit that controls the entire digital watermark detection device, 114 is a database, and 120 is a processing program unit. Shows.

Further, the processing program section 120 includes the following processing sections. The image scan processing unit 121 is, for example, a digital camera, a handy scanner, or the like, and is a processing unit that obtains digital image data by reading and digitizing information of characters and images printed on a ticket face such as a ticket. The digital watermark information detection processing unit 122 performs processing for extracting digital watermark information from the digital image data read by the image scan processing unit 121. The character detection processing unit 123 is the image scan processing unit 121.
Is a processing unit for extracting character information from the digital image data read by. The ticket issuer confidential information storage processing unit 124 is a processing unit that stores, in the database 114 or the like, “ticket issuer confidential information” notified in advance by a ticket issuing instructor such as the server 101a of the ticket reservation center 101. The data matching processing unit 125 is a processing unit for matching the character information and the corresponding data of the digital watermark information. The display processing unit 126 is a CRT, a liquid crystal display device, or the like, and is a processing unit for displaying the matching result in the data matching processing unit 125.

The processing program unit 120 may be realized by dedicated hardware,
Further, this processing program unit is composed of a memory and a CPU (central processing unit) which are one of storage means, and a program (not shown) for realizing the function of this processing unit.
May be realized by loading the program into a memory and executing the program. In addition, it is assumed that an input device, a display device, and the like (none of which is displayed) are connected to the electronic watermark detection device 111 as peripheral devices.
Here, the input device refers to an input device such as a keyboard and a mouse. A display device is a CRT (Cath
ode Ray Tube) and liquid crystal display devices.

[Second Embodiment] FIG. 13 is a block diagram showing a configuration example of a ticket output device 130 equipped with a digital watermark information encryption function. Shows an example of using.

Each means shown in FIG. 13 has the following functions. The data combining means 131 is means for combining ticket issuing information such as "ticket issuer secret information", "purchaser code", "seller code", and "reservation number" as "unique information" of the ticket. The encryption means 132 is means for encrypting unique information using an encryption key. As the encryption algorithm, for example, "keyed message digest (M
D) is used to create a message digest (MD) of unique information using the "common key encryption CBC mode" based on "Example of encryption using the unique information (information of FIG. 4). (Corresponds to (MD) 15d). In this example, the message digest (MD) is obtained from the unique information and is used as the encrypted unique information, but the invention is not limited to this, and the general “encryption key” described in FIG. 3 is used. Encryption methods can also be used. Further, as the "hash function" for obtaining the message digest (MD), either "hash function with key" or "hash function without key" can be used. The digital watermarked image data generation unit 133 generates digital watermarked background image data that is embedded in the background image data to be printed on the ticket, using the encrypted unique information (message digest (MD)) as digital watermark information. Is a means to The character image generating means 134 is means for generating character image data including characters and images to be printed on the face of the ticket. In this case, as the character information, information specifying the "event content" and ticket issuing information such as "purchase code", "seller code", and "reservation number" are used. Further, the characters or images printed on the face of the bill may include a barcode or a two-dimensional barcode. The print output data generation unit 135 is a unit for generating print output data to be actually printed, and synthesizes the digital watermarked background image data and the character image data,
Generate print output data. The printing unit 136 is a unit for actually printing the print output data with a commercially available printer or the like. The example shown in FIG. 13 is an example in which both a tint block and a background pattern in which electronic watermark information is embedded and character image data such as ticket issuing information are printed on the surface of a ticket such as a ticket. May be omitted, and only the digital watermarked background image data may be printed.

FIG. 14 is a processing flow for explaining the operation of the ticket output device 130 shown in FIG. 13, and the processing flow will be described below. (1) By the data combining means 131, "ticket issuer secret information 141", "purchaser code 142", "seller code 1"
Ticket issuing information such as "43" and "reservation number 144" is combined to generate unique information 146 (step S3).
1). (2) In addition, the encryption unit 132 causes the unique information 146.
Is generated and encrypted unique information (message digest (MD)) 148 is generated (step S3).
2). (3) From the unique information (MD) 148 and the background image data 149 encrypted by the digital watermarked image data generating means 133, the unique information (MD) 148 encrypted.
Is generated as digital watermark information to generate digital watermark embedded background image data 150 (step S33). (4) In addition, the character image generation means 134 causes a character image to be obtained from ticket issuing information such as “purchaser code 142”, “seller code 143”, “reservation number 144”, and “other face print data 145”. The data 151 is generated (step S34). (5) The print output data generation unit 135 generates print output data 152 to be actually printed from the digital watermarked background image data 150 and the character image data 151 (step S35). (6) The printing unit 136 prints the electronic watermarked ticket 153 based on the print output data 152 (step S36).

Further, FIG. 15 is a block diagram showing a specific example of the configuration of the ticket output device 130 having the encryption function shown in FIG. 13, and shows only a portion directly related to the present invention. . In FIG. 15, 161 is a ticket reservation center for issuing tickets, 161a is a server of the ticket reservation center, 162 is a ticket reception gate such as a baseball field, 162a is a digital watermark detection device of the ticket reception gate, 163 is a network, and 170 is a convenience store. A store, 171 is a ticket output device, 172 is a communication interface for connecting the network 163 and the ticket output device 170, 173 is a control unit for overall control of the ticket output device, 174 is a database, 18
Reference numeral 0 indicates a processing program section. Further, in the database 174, ticket issuing information such as "ticket issuer secret information", "buyer code", "seller code", "reservation number", "other face print data", and "encryption key data". Is recorded.

Further, the processing program section 180 includes the following processing sections. The data combination processing unit 181 displays the “ticketer secret information 14
1 "," Purchaser code 142 "," Seller code 14 "
Data of ticket issuing information such as "3" and "reservation number 144" are combined. This is a processing unit that generates unique information 146. -The encryption processing unit 182 obtains the message digest (MD) from the unique information 146 using the encryption key data 147 and the hash function, and the message digest (M
D) is the processing unit that uses the encrypted unique information 148. In this example, the "common key encryption CBC mode" is used to obtain the message digest (MD), but the encryption method is not particularly limited to this.
The general encryption method shown in FIG. 3 can also be used. The digital watermark embedded image data generation processing unit 183 uses the encrypted unique information 148 as digital watermark information to generate digital watermark embedded background image data 150 embedded in the background image data 149 to be printed on the ticket. It is a department. The character image generation processing unit 184 is a processing unit that generates the character image data 151 from the characters or images printed on the face of the ticket. As information of this character, "purchaser code 142", "seller code 143", "reservation number 14"
4 ”and ticket issuing information such as“ other face print data 145 ”for specifying the event content. The print output data generation processing unit 185 is a processing unit that generates print output data to be actually printed, and synthesizes the digital watermarked background image data 150 and the character image data 151 to generate print output data 152. Perform processing. The print processing unit 186 is a processing unit that prints a ticket with a digital watermark based on the print output data 152 using a commercially available printer or the like.

The processing program section 180 may be realized by dedicated hardware,
Further, this processing program unit is composed of a memory and a CPU (central processing unit) which are one of storage means, and a program (not shown) for realizing the function of this processing unit.
May be realized by loading the program into a memory and executing the program. Further, it is assumed that the ticket output device 171 is connected with an input device, a display device and the like (none of them is displayed) as peripheral devices. Here, the input device refers to an input device such as a keyboard and a mouse. A display device is a CRT (Cathod
e Ray Tube) and liquid crystal display devices.

FIG. 16 is a block diagram showing an example of the arrangement of a digital watermark detecting apparatus compatible with the encryption of digital watermark information. The digital watermark embedded with the ticket output apparatus described with reference to FIGS. The example of the apparatus which reads a ticket is shown.

Each means shown in FIG. 16 has the following functions. The image scanning unit 191 is, for example, a digital camera, a handy scanner, or the like, and is a unit for reading the information of characters and images printed on the face of a ticket such as a ticket and digitizing it to obtain digital image data. The digital watermark information detecting means 192 is means for extracting digital watermark information from the read digital image data. The character detecting means 193 is means for detecting character information from the digital image data of the bill surface read by the image scanning means 191. The information read by the character detecting unit 193 is character information such as "purchaser code", "seller code", "reservation number", and "other face print data". The data combining unit 194 is the character information read by the character detecting unit 193, that is, "purchaser code", "seller code", "reservation number", "other face print data",
And the respective data of the "ticketer secret information" recorded in advance by the ticket issuer secret information storage means 198 to generate unique information. The encryption key information storage unit 195 is a unit for storing the encryption key data notified by the ticket issuer. The encryption means 196 is means for encrypting the unique information combined by the data combining means 194 using the encryption key data. The same encryption algorithm as that used in the ticket output device shown in FIGS. 13 to 15 is used. That is, the "common key cryptography CBC" based on the "encryption method using the message digest (MD) with key" shown in FIG.
Mode ”is used to generate a message digest (MD) of unique information, which is used as encrypted unique information. The data collating means 197 is means for collating the encrypted unique information obtained from the encrypting means 196 with the encrypted unique information in the digital watermark information obtained from the digital watermark information detecting means 192. is there. The display unit 199 is a CRT, a liquid crystal display device, or the like, and is a unit for displaying the matching result of the data matching unit 197.

FIG. 17 is a processing flow for explaining the operation of the digital watermark detection apparatus shown in FIG. 16, and the processing flow will be described below. (1) The image scanning means 191 scans the face of the electronic watermarked ticket 206 to obtain digital image data 207 (step S41). (2) The electronic watermark information detecting means 192 extracts the encrypted unique information (message digest (MD)) 208 from the digital image data 207 (step S42). (3) The character detecting means 193 detects character information from the digital image data 207 (step S4).
3). As a result, character information of "purchaser code 201", "seller code 202", "reservation number 203", and "other face print data 204" is obtained. (4) The data combining means 194 causes the character detecting means 19
Data of "Purchaser code 201", "Seller code 202", "Reservation number 203", "Other face print data 204", and "Ticketer secret information 205" obtained from No. 3 are combined to obtain unique information. 209 is generated (step S4
4). (5) The unique information 209 is encrypted by using the encryption unit 196, the encryption key data stored in the encryption key storage unit 195, and the hash function, and the encrypted unique information (message digest (MD) ) 211 is generated (step S45). As an encryption algorithm,
The same encryption algorithm as that used in the ticket output device shown in FIGS. 12 to 14 is used. That is,
The message digest with key (MD) shown in FIG.
"Common key encryption CBC" which is an application example of "encryption using
Mode ”is used to generate a message digest (MD) of unique information, and this is used as encrypted unique information (message digest (MD)). (6) The encrypted unique information (message digest (MD)) 208 extracted by the digital watermark information detecting means 192 by the data collating means 197 and the encrypting means 19
The encrypted unique information (message digest (MD)) 211 generated in 6 is collated (step S4).
6). (7) The display unit 199 outputs and displays the collation result on a CRT, a liquid crystal display device or the like (step S47).

FIG. 18 is a block diagram showing a concrete example of the configuration of the digital watermark detection apparatus shown in FIG.
Only the portions directly related to the present invention are shown. In FIG. 18, 221 is a ticket reservation center for instructing ticket issuance, 221a is a server of the ticket reservation center, 222 is a convenience store, 222a is a ticket output device of the convenience store, 223 is a network, 240 is a ticket reception such as a baseball field. The reference numeral 241 is a digital watermark detection device, 242 is a communication interface connecting the network 223 and the ticket output device 241, 243 is a control unit for overall control of the digital watermark detection device, 244 is a database, and 250 is a processing program unit. Shows.

The database 244 has encryption key data,
Confidential information about ticket issuers is recorded. Further, the processing program section 250 includes the following processing sections. The image scan processing unit 251 is, for example, a digital camera, a handy scanner, or the like, and is a processing unit that reads the information of characters and images printed on the face of a ticket such as a ticket and converts the information into digital image data. The digital watermark information detection processing unit 252 performs processing for extracting digital watermark information from the digital image data read by the image scan processing unit 251. The character detection processing unit 253 is the image scan processing unit 251.
Is a processing unit for extracting character information from the digital image data read by. -The ticket issuer confidential information storage processing unit 254 is the "ticket issuer confidential information" notified in advance by the issuer of the ticket or card.
Is stored in a storage unit such as the database 244. The data combination processing unit 255 combines data such as “ticketer secret information”, “purchaser code”, “seller code”, and “reservation number” obtained from the character detection processing unit 253 as unique information. It is a department. -The encryption processing unit 256 uses the hash function and the encryption key data stored in the database 244 to encrypt the unique information 209 to generate the encrypted unique information (message digest (MD)) 211. . The same encryption algorithm as that used in the ticket output device shown in FIG. 14 is used. That is, using the “common key encryption CBC mode” based on the “example of encryption using a keyed message digest (MD)” shown in FIG. 4, a message digest (MD) of unique information is generated, This is the encrypted unique information. The data matching processing unit 257 includes the encrypted unique information (message digest (MD)) 208 extracted by the digital watermark information detection processing unit 252, and the encryption processing unit 256.
The process of collating with the encrypted unique information (message digest (MD)) 211 generated in step 3 is performed. The display processing unit 258 is a CRT, a liquid crystal display device, or the like, and is a processing unit for displaying the matching result in the data matching processing unit 257.

The processing program section 250 may be realized by dedicated hardware,
Further, this processing program unit is composed of a memory and a CPU (central processing unit) which are one of storage means, and a program (not shown) for realizing the function of this processing unit.
May be realized by loading the program into a memory and executing the program. Further, it is assumed that an input device, a display device, etc. (none of which is displayed) are connected as peripheral devices to the digital watermark detection device 241.
Here, the input device refers to an input device such as a keyboard and a mouse. A display device is a CRT (Cath
ode Ray Tube) and liquid crystal display devices.

[Third Embodiment] FIG. 19 is a block diagram showing a configuration example of the ticket output device 260 using the encryption key data generated from the passphrase. The example of the ticket output device equipped with the function which produces | generates is shown. The passphrase input unit 261 is a unit for a user who purchases a ticket to input a passphrase that is a basis for generating encryption key data. The encryption key generation means 262 is a means for generating encryption key data from the passphrase input by the user. The data combining unit 263 is a unit for combining data such as "ticket issuer secret information", "purchaser code", "seller code", and "reservation number" to generate unique information. The encryption means 264 converts the unique information into the encryption key generation means 26.
It is a means for encrypting using the encryption key data generated in 2 and a hash function. As the encryption algorithm, for example, "common key encryption CBC mode" based on "example of encryption using keyed message digest (MD)" shown in FIG. 4 is used, and a message digest of unique information ( MD) is generated and used as encrypted unique information (message digest (MD)).
In this example, the message digest (MD) is obtained from the unique information and is used as the encrypted unique information (message digest (MD)), but not limited to this, the general description described in FIG. An encryption method using a typical "encryption key" can also be used. Further, as the "hash function" for obtaining the message digest (MD), either "hash function with key" or "hash function without key" can be used. The digital watermarked image data generation means 265 generates digital watermarked background image data that is embedded in the background image data to be printed on the ticket, using the encrypted unique information (message digest (MD)) as digital watermark information. Is a means to The character image generation means 266 is means for generating character image data composed of characters and images to be printed on the face of a ticket. This character information includes information that identifies the "event content,""buyercode,""sellercode,"
Use ticketing information such as "booking number". In addition, the characters and images printed on the face of the ticket must have a barcode or 2
May include dimensional barcode. The print output data generating means 267 is means for generating print output data to be actually printed, and synthesizes the digital watermarked background image data and the character image data to generate print output data. The printing unit 268 is a unit for printing characters and images on a ticket face such as a ticket based on print output data by a printer or the like. The example shown in FIG. 19 is an example in which both a tint block or background pattern in which electronic watermark information is embedded and character image data such as ticket information are printed on a ticket surface such as a ticket. It may be omitted, or only the background image data with a digital watermark may be printed.

FIG. 20 is a processing flow for explaining the operation of the ticket output device 260 shown in FIG. 19. Below, the flow of the operation of the ticket output device 260 will be explained based on FIG. (1) The passphrase input unit 261 and the encryption key generation unit 262 generate the encryption key data 288 from the passphrase 287 input by the user who purchases the ticket or the like (step S51). (2) On the other hand, the data combining unit 263 combines the data such as “ticketer secret information 281”, “purchase code 282”, “seller code 283”, and “reservation number 284” to generate unique information 286. Yes (step S52). In addition, the encryption key data 288 by the encryption means 264,
The unique information 286 is encrypted by using the hash function, and the encrypted unique information (message digest (MD)) 289 is generated (step S53). In this example, the "common key encryption CBC mode" is used as the encryption algorithm, but the encryption algorithm is not limited to this. (3) The digital watermarked image data generation means 265 embeds the encrypted unique information (message digest (MD)) 289 into the background image data 290 as digital watermark information, and the digital watermarked background image data 2
91 is generated (step S54). (4) Further, the character image generation means 266 causes the character image data to be obtained from the ticket issuing information of the “buyer code 282”, the “seller code 283”, the “reservation number 284”, and the “other face print data 285”. 292 is generated (step S55). (5) The print output data generation means 267 synthesizes the digital watermarked background image data 291 and the character image data 292 to generate print output data 293 (step S56). (6) The print output data 293 is printed by the printing unit 268 to create the electronic watermarked ticket 294 (step S57).

FIG. 21 is a block diagram showing a specific example of the configuration of the ticket output device 260 shown in FIG. 19, showing only the portion directly related to the present invention. In FIG. 21, 301 is a ticket reservation center for instructing ticket issuance, 301 a is a server of the ticket reservation center, 302 is a ticket reception gate such as a baseball field, 302 a is a digital watermark detection device of the ticket reception gate, 303 is a network, 310 Is a convenience store, 311 is a ticket output device, 312 is a communication interface for connecting the network 303 and the ticket output device 311, 313 is a control unit for controlling the entire ticket output device 311, 314 is a database, and 320 is a processing program unit. Shows.

The database 314 is generated from ticket issuing information such as "ticket issuer secret information", "buyer code", "seller code", "reservation number", "other face print data", and passphrase. "Encryption key data"
Is recorded.

Further, the processing program section 320 includes the following processing sections. The passphrase input processing unit 321 is a processing unit that allows the user to input a passphrase that is a basis for generating encryption key data. The encryption key generation processing unit 322 is a processing unit for generating encryption key data from the passphrase input by the user. This processing unit stores the generated encryption key data in the database 314. The data combination processing unit 323 uses the “ticketer secret information”,
This is a processing unit that combines data such as "purchaser code", "seller code", and "reservation number" to generate unique information 286. The encryption processing unit 324 obtains the message digest (MD) of the unique information 286 by using the encryption key data 288 and the hash function, and the message digest (M
Let D) be the encrypted unique information (message digest (MD)) 289. In this example, the “common key encryption CBC mode” is used to obtain the message digest (MD), but the encryption method is not particularly limited to this, and the general method shown in FIG. 3 is used. Encryption methods can also be used. The digital watermarked image data generation processing unit 325 uses the encrypted unique information (message digest (MD))
This is a processing unit for generating background image data 291 with a digital watermark in which 289 is embedded in the background image data 290 as digital watermark information. The character image generation processing unit 326 is a processing unit that generates the character image data 292 from the characters or images printed on the face of the ticket. As the information of this character, information such as "purchaser code", "seller code", "reservation number", and "other ticket face print data" for specifying the event content is used. The print output data generation processing unit 327 is a processing unit that generates print output data 293 to be printed on the face of the ticket, and includes background image data 291 with a digital watermark and character image data 29.
2 and 2 are combined to generate print output data 293. The print processing unit 328 performs a process of printing the print output data 293 on the ticket with a commercially available printer or the like.

The processing program section 320 may be realized by dedicated hardware,
Further, this processing program unit is composed of a memory and a CPU (central processing unit) which are one of storage means, and a program (not shown) for realizing the function of this processing unit.
May be realized by loading the program into a memory and executing the program. Further, it is assumed that the ticket output device 311 is connected with an input device, a display device, and the like (neither is displayed) as peripheral devices. Here, the input device refers to an input device such as a keyboard and a mouse. A display device is a CRT (Cathod
e Ray Tube) and liquid crystal display devices.

FIG. 22 is a block diagram showing a configuration example of a digital watermark detection device 340 compatible with passphrase encryption, which is an example of a digital watermark detection device equipped with an encryption key generation function from a passphrase. The image scanning unit 341 is, for example, a digital camera, a handy scanner, or the like, and reads and digitizes characters or images printed on the face of a ticket or the like,
It is a means for obtaining digital image data. The electronic watermark information detecting means 342 is means for extracting electronic watermark information from the digital image data read by the image scanning means 341. The character detecting means 343 is means for extracting character information from the digital image data read by the image scanning means 341. The ticket issuer confidential information storage unit 344 is a unit that stores “ticket issuer confidential information” notified in advance by the issuer of a ticket, a card, or the like in a storage unit (for example, a memory or a hard disk). The data combining unit 345 is a unit for combining data such as “ticket issuer secret information”, “purchaser code”, “seller code”, and “reservation number” to generate unique information. The passphrase input unit 346 is a unit for a user who purchases a ticket or the like to input a passphrase that is a basis for generating the encryption key data. The encryption key generation means 347 is means for generating encryption key data from the passphrase input by the user. The encryption means 348 is means for encrypting the unique information combined by the data combining means 345 using the encryption key data and the hash function. The same encryption algorithm as that used in the ticket output device shown in FIGS. 19 to 21 is used as the encryption algorithm. That is, using the “common key encryption CBC mode” based on the “example of encryption using a keyed message digest (MD)” shown in FIG. 4, a message digest (MD) of unique information is generated, This message digest (MD) is the encrypted unique information (message digest (MD)). The data matching unit 349 obtains the unique information (message digest (M
D)) and the unique information (message digest (MD)) included in the digital watermark information obtained from the digital watermark detecting means 342. The display unit 350 is a CRT, a liquid crystal display device, or the like, and is a unit for displaying the matching result in the data matching unit 349.

FIG. 23 is a processing flow for explaining the operation of the digital watermark detection apparatus 340 shown in FIG. 22, and the processing flow in the ticket output apparatus 340 will be described below with reference to FIG. . (1) The image scanning unit 341 scans and digitizes the face of the electronic watermarked ticket 376,
Obtained as digital image data 377 (step S6)
1). Further, the electronic watermark information detecting means 342 detects the electronic watermark information from the digital image data 377, and the obtained unique information (message digest (M
D)) 378 is obtained (step S62).

(2) Character information in the digital image data 377 is detected by the character detection means 343, and "purchaser code 371", "seller code 372", "reservation number 373", and "other printing on the printed surface". Data 374 "and the like are obtained as character information (step S63). (3) Further, the character information (“purchaser code 371”, “seller code 3” detected by the data combining unit 345 is displayed.
72 "," reservation number 373 ", and" other face print data 374 ") and ticket issuer secret information 375 stored in advance in a predetermined storage means are combined to generate unique information 379 (step S64). . (4) On the other hand, the passphrase 38 input by the user by the passphrase input means 346 and the encryption key generation means 347.
The encryption key data 382 is generated from 1 (step S6).
5). (5) Using the encryption unit 348, the encryption key data 382 generated by the encryption key generation unit 347, and the hash function, the unique information 379 is encrypted, and the encrypted unique information (message digest (message digest ( MD)) 380 is generated (step S66). The same encryption algorithm as that used in the ticket output device shown in FIGS. 19 to 21 is used as the encryption algorithm. That is, using the “common key encryption CBC mode” based on the “example of encryption using a keyed message digest (MD)” shown in FIG. 4, a message digest (MD) of unique information is generated, This is defined as the unique information (message digest (MD)) 380. (6) Further, the unique information (message digest (MD)) 380 generated from the character information and the like by the data collating means 345 and the electronic watermark information detecting means 342.
The unique information (message digest (MD)) 378 obtained from the face image data 377 is collated (step S67). (7) Further, the display unit 350 displays the collation result of the unique information (message digest (MD)) 378, 380 displayed on the display unit 35 such as a CRT or a liquid crystal display device.
Displayed by 0.

FIG. 24 is a block diagram showing a concrete example of the configuration of the digital watermark detection apparatus 340 shown in FIG. 22, and shows only the portion directly related to the present invention. In FIG. 24, 401 is a ticket reservation center for instructing ticket issuance, 401 a is a server of the ticket reservation center, 402 is a convenience store, and 402.
a is a ticket output device of a convenience store, 403
Is a network, 410 is a ticket reception gate such as a baseball field, 411 is a digital watermark detecting device, 412 is a communication interface for connecting the network 403 and the digital watermark detecting device 411, and 413 is control for integrally controlling the entire ticket detecting device 411. Part, 414 is a database, 4
Reference numeral 20 denotes a processing program section. Database 4
In “14, ticket issuer secret information” and the like are recorded.

Further, the processing program section 420 includes the following processing sections. The image scan processing unit 421 is, for example, a digital camera, a handy scanner, or the like, and performs a process of reading characters or images printed on the face of a ticket or the like to obtain digitalized digital image data 377. The digital watermark information detection processing unit 422 uses the digital image data 3 read by the image scan processing unit 421.
The process for extracting the digital watermark information from 77 is performed.
The electronic watermark information extracted here is the created unique information (message digest (MD)) 378. The character detection processing unit 423 is the image scan processing unit 421.
Is a processing unit for extracting character information from the digital image data 377 read by. In the case of this example,
"Buyer code 371", "Seller code 372",
"Reservation number 373", "Other face print data 374"
Data such as is extracted as character information. The ticket issuer secret information storage processing unit 424 is the “ticket issuer secret information” notified in advance by the issuer of the ticket or card.
Is a processing unit for storing in the database 414. The data combination processing unit 425 displays the “ticket issuer secret information 37
5 "," Purchaser code 371 "," Seller code 37 "
This is a processing unit that combines data such as "2" and "reservation number 373" to generate unique information 379. The passphrase input processing unit 426 uses the encryption key data 38
This is a processing unit for allowing the user to input the passphrase 381 that is the basis for generating 2. The encryption key generation processing unit 427 is a processing unit for generating the encryption key data 382 from the pass phrase 381 input by the user. The encryption processing unit 428 is a processing unit that encrypts the unique information 379 using encryption key data and a hash function. As the encryption algorithm, for example, "common key encryption CBC mode" or the like is used. -The encryption processing unit 428 uses the encryption key data 382 generated from the passphrase 381 to generate the unique information 379.
Is encrypted, and the generated unique information (message digest (MD)) 380 is generated. As the encryption algorithm, the ticket output device 310 shown in FIG. 21 is used.
The same encryption algorithm is used as in.
That is, using the “common key encryption CBC mode” based on the “example of encryption using a keyed message digest (MD)” shown in FIG. 4, a message digest (MD) of unique information is generated, This is the unique information (message digest (MD)). The data matching processing unit 429 uses the unique information (message digest (MD)) 378 extracted by the digital watermark information detection processing unit 422 and the unique information (message digest (M) generated by the encryption processing unit 428.
D)) 380 is checked. The display processing unit 430 is a CRT, a liquid crystal display device, or the like, and is a processing unit for displaying the matching result in the data matching processing unit 429.

The processing program section 420 may be realized by dedicated hardware,
Further, this processing program unit is composed of a memory and a CPU (central processing unit) which are one of storage means, and a program (not shown) for realizing the function of this processing unit.
May be realized by loading the program into a memory and executing the program. Further, it is assumed that the digital watermark detection device 411 is connected to peripheral devices such as an input device and a display device (none of which is displayed).
Here, the input device refers to an input device such as a keyboard and a mouse. A display device is a CRT (Cath
ode Ray Tube) and liquid crystal display devices.

[Fourth Embodiment] In the first, second, and third embodiments, a background image, a tint block, and characters on the face of a ticket are used by using a commercially available printer in which tickets are connected to a personal computer or the like. Although an example of printing information and the like has been described, in the fourth embodiment, a background image and a tint block are printed using a gravure printing machine or an offset printing machine (also simply referred to as a “printing machine”), and a commercially available An example will be described in which individual unique information for each card such as an image and character information is printed on the face of a ticket using a printer.

FIG. 25 is a diagram showing an example of a ticket 500 issued by using a printing machine and a printer together. A background pattern 501 and a copy check pattern 502 are printed on the ticket 500, and character information 504 and a design image 503 are printed as individual ticket information. Note that the copy restraint pattern 502 is a pattern that is made so that characters such as “COPY” and “X” are conspicuously copied when a copy of the ticket 500 is made with a copy machine, and that the copy can be seen at a glance. That is. Also, lot-specific information for each print lot is embedded as electronic watermark information in the background pattern 501, and individual individual information for each ticket is electronically stored in the individual ticket information portion (character information 504 and design image 503). It is embedded as watermark information.

In addition to this, a bar code or a two-dimensional code can be printed if necessary, and special printing can be performed using invisible ink or the like in order to improve the forgery prevention effect.

The information for each print lot, which is included in the background pattern 501 as digital watermark information, is also called "lot-specific information". When printing a ticket or the like on a printing machine, the digital watermark information is selected one by one. The digital watermark information is selected for each lot or for each date and embedded in the background pattern 501. On the other hand, in the case of printing with a printer, the electronic watermark information can be individually selected for each ticket and embedded in the character information 504, the design image 503, and the like, and can be printed. Further, a portion in which the individual unique information for each ticket or each card is inserted as digital watermark information is also referred to as a “front pattern”, and a portion in which the unique information for each lot is embedded as electronic watermark information is also referred to as a “background pattern”.

FIG. 26 is a diagram showing an example of a card 510 issued by using a printing machine and a printer together. The card 510 is basically the same as the ticket 500 (FIG. 25). The card 510 has a background pattern 511.
The unique information for each lot is embedded as electronic watermark information in the.
Characters 512 and photographs 513 are information printed by a printer, and individual unique information is embedded as digital watermark information for each card 510. The hologram 514 is attached to further increase the security level.

FIG. 27 is a diagram showing an outline flow of background printing on a card and ticket by a printing machine and individual printing by a printer. First, a printing machine 522 is printed on a plain medium 521 such as paper or plastic. To print the background pattern. In printing with the printing machine 522, a plate is changed for each lot, and a background pattern in which lot-specific information is embedded as electronic watermark information is printed. Thereafter, the printer 523 prints the individual unique information. In addition, "lot number", "date", "company name", etc. are used for the lot-specific information, and "ticketer secret information" is used as necessary. Also, as individual unique information,
"Personal number", "Name", "Ticket information", "Date"
Etc. are used. As a result, a card in which lot-specific information is printed on the background pattern and individual unique information is printed on the front pattern as electronic watermark information, a ticket 524, and the like are obtained.

FIG. 28 is a diagram showing a schematic processing flow of printing a background pattern. A plain medium is supplied to the printing machine 533 as a plain roll paper 531 or a plain card 532, and lot-specific information. The background pattern in which is embedded as digital watermark information is printed. The medium on which the background pattern is printed is delivered to a predetermined place and set in the printer.

FIG. 29 is a diagram showing a schematic processing flow for printing the individual unique information. First, the background-printed medium 54 on which the background pattern is printed
1 is set in the printer 542. The printer 542 first reads the digital watermark information embedded in the background pattern, and prints the background printed medium 541.
Make sure that is valid. After that, based on the read digital watermark information of the background pattern and the individual unique information, the digital watermark information for the front pattern is generated. -Then, printing is performed by embedding individual unique information as digital watermark information in the front pattern such as characters and images. The medium on which the front pattern is printed is sent or provided to the user and used as a ticket or a card.

Further, FIG. 30 is a block diagram showing a configuration example of the background printing machine 551. The encryption means 552 is means for encrypting lot-specific information and obtaining the encrypted unique information. As the encryption algorithm, for example, the encryption method using the general “encryption key” described in FIG. 3 can be used,
The message digest with key (MD) shown in FIG.
Can also be used. Further, as the "hash function" for obtaining the message digest (MD), either "hash function with key" or "hash function without key" can be used. In this example, in addition to the encryption of the lot-specific information, a message digest (MD) is further obtained from the encrypted lot-specific information in order to prevent reading error of the digital watermark information, and the message digest (M
D) is added as a unique MD to the encrypted unique information for each lot. The digital watermark-embedded image data generation unit 553 embeds the encrypted lot-specific information in the background pattern as digital watermark information to generate digital watermark-embedded background image data. The print output data generation unit 554 collects and outputs the digital watermark background image data in which lot-specific information is embedded as digital watermark information, and the data to be printed as a background pattern such as a copy check pattern, if necessary. Generate data. The printing unit 555 prints the print output data on the medium by a printing machine such as a gravure printing machine or an offset printing machine. The print output data may be treated as digital data, and may be a plate used for printing. Here, the case of handling as digital data will be described, but the same applies to the case of a plate.

The example shown in FIG. 30 is an example in which only background image data with a digital watermark such as a tint block or background pattern in which lot-specific information is embedded as digital watermark information is printed on the face of a card or ticket. Shows,
Further, lot-specific information or the like may be printed as character information.

Further, FIG. 31 is a diagram showing a processing flow of background pattern printing, and hereinafter, the processing flow of background pattern printing will be described with reference to FIG. (1) Lot-specific information 561 (“ticket issuer confidential information”,
"Lot number", "company name", "date", etc.) are encrypted (step S101), so that even if the digital watermark information is read, the original information cannot be restored, Do this to increase security. (2) Further, after the lot-specific information 561 is encrypted, a message digest (MD) is obtained from the encrypted lot-specific information (step S102).
The unique MD is added to the encrypted unique information for each lot. As a result, it is possible to confirm whether the decrypted information has an error and to prevent unauthorized alteration of the information. (3) The encrypted unique information for each lot and the unique MD information are embedded as digital watermark information in the background pattern 562 to generate the digital watermarked background image data 563 (step S103). (4) Print output data 564 is generated from the digital watermarked background image data 563 (including the copy check pattern and the like if necessary) (step S104). (5) Print the print output data 564 on a plain medium,
A background printed medium 565 on which the digital watermarked background image data 563 is printed is generated (step S105).

FIG. 32 is a block diagram showing a concrete example of the construction of the background printing machine, and shows only the portion directly related to the present invention. In FIG. 32, 6
01 is a network, 602 is a printing company that performs background printing of tickets, 610 is a background printing machine, 611 is a communication interface that connects the network 601 and the background printing machine 610, and 612 is a control unit that controls the entire background printing machine 611. , 613 is a database, and 620 is a processing program section. In the database 613, information such as “lot number”, “date”, “company name” and the like is recorded as lot-specific information, and information used as a background pattern is also recorded.

Further, the processing program section 620 includes the following processing sections. The encryption processing unit 621 encrypts lot-specific information (“ticket issuer secret information”, “lot number”, “company name”, “date”, etc.). As the encryption algorithm, for example, the general encryption method using the “encryption key” described in FIG. 3 can be used, and the “keyed message digest (MD)” shown in FIG. 4 is used. An "encryption method" can also be used. Also, a message digest (MD) is obtained from the encrypted lot-specific information, and this is added to the encrypted lot-specific information as a unique MD. The digital watermark-embedded image data generation processing unit 622 embeds the encrypted lot-specific information and unique MD information in the background pattern 562 as digital watermark information to generate digital watermark-embedded background image data 563. The print output data generation processing unit 623 generates print output data 564 that includes the digital watermark embedded background image data 563 and the data to be printed as the background pattern including the copy check pattern and the like when necessary. The print processing unit 624 performs a process of printing the print output data with a printing machine such as a gravure printing machine or an offset printing machine.

The processing program section 620 may be realized by dedicated hardware,
Further, this processing program unit is composed of a memory and a CPU (central processing unit) which are one of storage means, and a program (not shown) for realizing the function of this processing unit.
May be realized by loading the program into a memory and executing the program. In addition, this background printing machine 6
It is assumed that an input device, a display device, etc. (none of which is displayed) are connected to the peripheral device 10 as peripheral devices. here,
The input device refers to an input device such as a keyboard and a mouse. A display device is a CRT (Cathode Ray
Tube) and liquid crystal display devices.

FIG. 33 is a block diagram showing an example of the arrangement of an individual unique information printing device 631 such as a printer. The image scanning unit 632 scans a ticket face such as a ticket or a card with a digital camera or a scanner to obtain digitized digital image data. The digital watermark information detecting means 633 extracts digital watermark information from the digital image data read from the face of the ticket. The lot-specific information confirmation unit 634 confirms, based on the lot-specific information and the unique MD obtained from the extracted digital watermark information, whether the information has been tampered with or whether the digital watermark has been read correctly. . If there is no problem, proceed with the process, and if there is a problem, handle the error. The encryption means 635 encrypts individual unique information (“ticket issuer secret information”, “buyer code”, “seller code”, “reservation number”, “date”, “other face print data”, etc.) To do. As the encryption algorithm, for example, FIG.
In addition to the general encryption method using the "encryption key" described in, the "encryption method using the keyed message digest (MD)" and the "keyless message digest" shown in FIG. An encryption method using (MD) "can be used. Further, in this example, a unique MD is generated from the encrypted individual unique information and added to the encrypted individual unique information. The digital watermark embedded image data generation means 636 generates front image data in which the digital watermark embedded in the front pattern is used as the encrypted individual unique information and the added unique MD as the digital watermark information. The print output data generation unit 637 is a unit for generating print output data from front image data with a digital watermark. The printing unit 638 is a unit for printing the print output data with a printer or the like.

In the example shown in FIG. 33, only the front side image data with the digital watermark is printed on the ticket face on which the background image data with the digital watermark in which the lot-specific information is embedded as the digital watermark information is printed. As an example,
Further, character or image information such as individual unique information may be printed. Then, a method of collating the electronic watermark information with the information of characters and images may be used. Furthermore, a barcode or a two-dimensional barcode may be printed.

FIG. 34 is a diagram showing a processing flow of individual unique information printing, and the flow of processing of individual unique information printing will be described below with reference to FIG. (1) When a print instruction is given, first one of the background printed media 651 such as cards and tickets set in the printer is selected, and the background pattern of the cards and tickets is read by the scanner in the printer to read a digital image. Data is obtained (step S111). (2) The digital watermark information printed on the background pattern is read from the digital image data of the background pattern, and lot-specific information 652 and a unique MD 653 are obtained (step S112). (3) Based on the lot-specific information 652 and the unique MD 653, it is confirmed whether the lot-specific information 652 has been tampered with, whether the digital watermark information has been correctly read, and the like. If there is no problem, the process proceeds, and if there is a problem, error processing is performed (step S113). In this confirmation, the lot-specific information 652 is obtained by using the same encryption key as the background printing machine 610 and the hash function to obtain the message digest (MD), and the message digest (MD) and the unique MD.
653 is confirmed. (4) On the other hand, "secret information of ticket issuer", "purchase code",
Individual unique information 6 by combining information such as "seller code", "reservation number", "date", and "other face print data"
54 is generated and the individual unique information 654 is encrypted (step S114). (5) A unique MD is calculated from the encrypted individual unique information (step S115) and added to the encrypted individual unique information. As a result, it is possible to confirm whether the decrypted information has an error and to prevent unauthorized alteration of the information. (6) The lot unique information 652 read in step S112, the encrypted individual unique information, and the added unique MD are embedded as digital watermark information in the front pattern 655 to obtain digital watermark embedded front image data 656. (Step S116). By simultaneously embedding the lot-specific information 652, it is possible to prevent only the front pattern from being illegally replaced. (7) The front pattern 656 including the digital watermark is collected for printing, and the print output data 657 is generated (step S117). (8) The print output data 657 is actually printed to generate a final ticket with a digital watermark and a card 658 (step S118).

FIG. 35 is a block diagram showing a concrete example of the structure of the individual unique information printing machine, and shows only the portion directly related to the present invention. In FIG. 35, reference numeral 701 is a network, 702 is a convenience store, 710 is an individual unique information printing device in the convenience store, 711 is a communication interface for connecting the network 701 and the individual unique information printing device 710, 7
Reference numeral 12 denotes a control unit that integrally controls the entire individual unique information printing apparatus 710, 713 a database, and 720 a processing program unit.

Further, the processing program section 720 includes the following processing sections. The image scan processing unit 721 is, for example, a processing unit that selects one background-printed medium set in the printer, reads the background pattern with the scanner in the printer, and obtains digital image data. The electronic watermark information detection processing unit 722 reads the electronic watermark information printed on the background pattern from the digital image data of the background pattern, and performs processing for obtaining lot-specific information 652 and unique MD653. The lot-specific information confirmation processing unit 723 confirms, based on the lot-specific information 652 and the unique MD 653, whether the lot-specific information 652 has been tampered with, whether the digital watermark information has been correctly read, and the like. If there is no problem, proceed with the process, and if there is a problem, handle the error. The encryption processing unit 724 uses individual unique information (“ticket issuer confidential information”, “buyer code”, “seller code”, “reservation number”, “other face print data”, “date”, etc.)
Encrypt. As an encryption algorithm, for example,
The general encryption method using the "encryption key" described in FIG. 3 can be used, and the "encryption method using the keyed message digest (MD)" and "no key" shown in FIG. An encryption method using a message digest (MD) "can be used. Further, in this example, a unique MD is generated from the encrypted individual unique information and added to the encrypted individual unique information. The unique MD is
It is a message digest (MD) of encrypted individual unique information for preventing reading error of digital watermark information. As a result, it is possible to prevent reading errors and confirm whether or not there has been tampering. The digital watermarked image data generation processing unit 725, lot-specific information 652, encrypted individual unique information,
The front surface pattern 655 using the individual MD as the digital watermark information
Is a processing unit for generating front image data 656 with a digital watermark embedded therein. The print output data generation processing unit 726 is a processing unit that generates print output data 657 to be printed on the face of the ticket, and prints the print output data 65 from the digital watermarked front image data 656.
Processing for generating 7 is performed. The print processing unit 727 is a processing unit that prints the print output data 657 on the face of a bill with a printer or the like.

The processing program section 720 may be realized by dedicated hardware,
Further, this processing program unit is composed of a memory and a CPU (central processing unit) which are one of storage means, and a program (not shown) for realizing the function of this processing unit.
May be realized by loading the program into a memory and executing the program. Further, it is assumed that an input device, a display device, etc. (neither is displayed) are connected to the individual unique information printout device 710 as peripheral devices. Here, the input device refers to an input device such as a keyboard and a mouse. A display device is a CRT
(Cathode Ray Tube) and liquid crystal display devices.

FIG. 36 is a block diagram showing a configuration example of a digital watermark detection apparatus 731 for lot-specific information and individual unique information. The image scanning means 732 is a means for reading the ticket surface of a digital watermarked ticket or card with a digital camera or a scanner to obtain digital image data of the ticket surface. The background pattern electronic watermark reading unit 733 reads the electronic watermark information embedded in the background pattern from the digital image data obtained by reading the bill surface, and obtains lot-specific information and unique MD. The lot-specific information confirmation unit 734 confirms, based on the obtained lot-specific information and the unique MD, whether the information has been tampered with or whether the digital watermark information has been correctly read. The front pattern electronic watermark reading unit 735 reads the electronic watermark information embedded in the front pattern from the digital image data obtained by reading the face of the ticket, and extracts lot-specific information, individual unique information, and unique MD. The individual unique information confirmation unit 736 determines whether information has been tampered with based on the extracted individual unique information and unique MD.
Check if the digital watermark information was read correctly. The collating unit 737 collates the lot-specific information of the unit 733 with the lot-specific information of the unit 735 to check whether the information has an error or whether the digital watermark information is correctly read.
Verify that the information has not been tampered with. This makes it possible to confirm whether the front pattern or the background pattern has been tampered with. In addition, the collation unit 737 may perform collation and verification based on the ticket number storage information included in the lot-specific number and the individual-specific information. The collation result output means 738 outputs and displays the confirmed result and the collation result on the CRT or the liquid crystal display device.

FIG. 37 is a diagram showing the flow of the detection processing of the lot-specific information and the individual characteristic information. The flow of the detection processing will be described below with reference to FIG. (1) A scanner or the face of a card 751 is read by a scanner to obtain digital image data (step S12).
2). (2) The electronic watermark information of the background pattern is read from the digital image data of the bill (step S122), and the lot-specific information 752 and the unique MD 753 are obtained. (3) Whether the information in the lot-specific information 752 has been tampered with based on the lot-specific information 752 and the unique MD 753,
It is confirmed whether or not the digital watermark information has been read correctly (step S123). If there is no problem, proceed with the process, and if there is a problem, handle the error. This confirmation is unique MD7
Using the encryption key and the hash function when 53 was created,
By obtaining the message digest (MD) from the lot-specific information 752, it can be determined whether it is the same as the unique MD 753. (4) The electronic watermark information is read from the front pattern of the digital image data obtained in step S121, and the individual unique information 754 and the unique MD 755 are extracted (step S124). If the electronic watermark information is included in the lot-specific information, the lot-specific information is also extracted. (5) Based on the individual unique information 754 and the unique MD 755, it is confirmed whether the information of the individual unique information 754 has been tampered with, or whether the digital watermark has been read correctly (step S12).
5). If there is no problem, proceed with the process, and if there is a problem, handle the error. (6) By comparing the ticket issuer secret information of the lot-specific information 752 with the ticket issuer secret information of the individual unique information 754, whether there is an error in the information, whether the digital watermark information has been correctly read, or whether the information has been tampered with. Is verified and the result is output (steps S126 and S127). It should be noted that the presence or absence of falsification can be verified here by the lot-specific information 752 and the lot-specific information obtained from step S124.

Further, FIG. 38 is a diagram showing a concrete example of the configuration of the digital watermark detecting apparatus shown in FIG. 36, and shows only a portion directly related to the present invention. Figure 3
In FIG. 8, 801 is a network, 811 is a communication interface for connecting the network 801 and the digital watermark detection device 810, and 812 is a digital watermark printing device 810.
813 is a control unit for controlling the whole of
Reference numeral 820 denotes a processing program section. The database 813 stores the encryption key data and the ticket issuer secret information used when the unique MD 753 and the unique MD 755 are generated. The encryption key data may be one or more.

Further, the processing program section 820 includes the following processing sections. The image scan processing unit 821 performs processing for reading the ticket surface of a digital watermarked ticket or card with a digital camera or scanner to obtain digital image data. The background pattern electronic watermark reading processing unit 822 is
The electronic watermark information of the background pattern is read from the digital image data obtained by reading the ticket face, and the lot-specific information 75
2 and a unique MD 753 are obtained. The lot-specific information confirmation processing unit 823 uses the hash function and the encryption key data stored in the database 813 based on the read lot-specific information 752 and the unique MD 753 to check whether information has been tampered with. A process is performed to confirm whether the watermark information has been read correctly. The digital watermark reading processing unit 824 of the front pattern is
The digital watermark information of the front pattern is extracted from the digital image data obtained by reading the bill surface, and the processing for extracting the individual unique information 754 and the unique MD 755 is performed. When the electronic watermark information includes lot-specific information, the processing unit 824 extracts lot-specific information. The individual unique information confirmation processing unit 825 uses the hash function and the encryption key data stored in the database 813 based on the read individual unique information 754 and the unique MD 755 to prevent the individual unique information 754 from being tampered with. Alternatively, a process for confirming whether or not the digital watermark information has been read correctly is performed. The collation processing unit 826 collates the ticket issuer secret information of the lot-specific information 752 with the ticket issuer confidential information of the individual unique information 754, and the information is tampered with, whether the digital watermark information was correctly read, or the information was tampered with. Perform the process to verify whether or not it has been done. This makes it possible to verify the presence or absence of tampering.
Further, if the processing unit 824 has extracted the lot-specific information, the matching processing unit 826 extracts the lot-specific information 7.
By checking with 52, the presence or absence of falsification can be verified. The collation result output processing unit 827 outputs the collation result to the CRT or the liquid crystal display device for display.

The processing program section 820 may be realized by dedicated hardware,
Further, this processing program unit is composed of a memory and a CPU (central processing unit) which are one of storage means, and a program (not shown) for realizing the function of this processing unit.
May be realized by loading the program into a memory and executing the program. Further, it is assumed that an input device, a display device, etc. (none of which is displayed) are connected as peripheral devices to the digital watermark detection device 810.
Here, the input device refers to an input device such as a keyboard and a mouse. A display device is a CRT (Cath
ode Ray Tube) and liquid crystal display devices.

In the example described above, the background printing is performed at the printing factory, and the individual unique information is mainly printed at a store such as a convenience store. However, even when the user issues a ticket at home, The invention can be applied. FIG. 39 is a diagram showing a schematic flow when the user issues a ticket at home. Hereinafter, the flow of processing when issuing a ticket at home will be described with reference to FIG. 39. (1) Background Printing (Step S131) The printing machine 902 performs background printing on a medium 901 such as paper or plastic. At this time, the electronic watermark information is inserted into the background pattern and the copy restraint process is performed. The lot-specific information to be embedded as digital watermark information in the background pattern includes
"Lot number", "date", "company name", etc. are used. (2) User-specific printing (step S132) User-specific printing is a ticket or card to be sent to a user so that the ticket or card cannot be diverted to other users when the ticket or card is sent to the user's home. In addition, the user-specific information (information such as the "buyer code" or the "seller code") that specifies the user in advance is used as electronic watermark information to perform printer printing on the front pattern of the ticket or card. The ticket or card on which the user-specific information is printed is delivered to the user's home, for example, in units of 10 sheets. (3) Individual printing (step S133) The user who receives the card or ticket on which the user-specific information is printed further receives individual unique information such as “ticket information”, “date”, and “reservation number” as digital watermark information. As a print on the front pattern of the card. In this way, the user can issue a ticket at home and there is no concern that the ticket or the like will be illegally used by anyone other than himself.
In addition, it is difficult to counterfeit tickets such as color copies by using a medium (backing paper, etc.) that is counterfeit-proof by a lot-specific background printing machine, and both convenience and fraud prevention are achieved. You can

Next, as a specific application example of the present invention, an example in which the present invention is applied to a soccer ticket will be described.

At present, certain soccer leagues are very popular, and it is very difficult to get a ticket for a match. Currently, this ticket is sold mainly at a ticket office using a dedicated ticket issuing machine. However, since it is very popular, there was a problem that a line could be formed at the ticket office on the day the ticket was released. We also accept reservations over the phone, but the number of calls is rushing on the day the ticket is released, and most of the calls are not connected. Therefore,
In the soccer league, we plan to accept reservations on the Internet, draw lots from the reservations and sell tickets

However, when a ticket is reserved on the Internet, how to give the actual ticket to the user becomes a problem. Of course, tickets will be issued at conventional ticket sales offices, but the number of sales offices is limited,
In particular, it is inconvenient for users in areas other than metropolitan areas. Although it may be possible to send the ticket by mail, there are problems such as the number of days to send the ticket and the postage. Therefore, it is planned to issue tickets using multimedia terminals at convenience stores that exist all over the country. The multimedia terminal of the convenience store already has a built-in printing function, and can issue tickets without making a large additional investment. However, the functions of the multimedia terminal are limited, and there is a technical problem in issuing a ticket by sufficiently taking measures against fraud.

Therefore, by utilizing the present invention, it is possible to supply a ticket medium, which has been adequately tampered with, to a multimedia terminal and issue a ticket securely and reliably. Further, by issuing a ticket at a convenience store, it is possible to make payment and issue a ticket at the same time, which improves user convenience.

FIG. 40 shows the processing when a soccer ticket is issued at a convenience store. (1) A user accesses the reservation management center 912 via the Internet 911 to open a Web page,
Make a reservation for the ticket. (2) The reservation management center 912 issues a ticket and notifies the charging information to the multimedia terminal 914 in the convenience store 913. (3) The user receives the ticket and pays the fee at the convenience store 913. It should be noted that there is a risk that a person concerned may extract the ticket medium and illegally use it in the process of supplying the ticket medium having the countermeasures against fraud to the multimedia terminal. Since it is embedded, it has the advantage of preventing fraud by internal parties.

As another specific example, the case of a gift voucher will be described. In automobile sales networks and the like, campaigns for sending special gifts to customers who visit the store by sending direct gift emails to customers who have purchased the car have been conducted. However, in the case where the free gift is particularly popular, there are cases in which a copy of the free gift voucher is brought and illegally received. Therefore, it is necessary to consider means for preventing fraud in the automobile sales network, but it is difficult to take an expensive counterfeit countermeasure for the gift voucher. In such a case, the present invention can be applied. That is, FIG. 41 is a diagram for explaining an example in the case of issuing a gift voucher. It is sent to each sales office 922. The cost is reduced by printing the medium collectively at the head office 821. (2) The sales office 922 refers to the managed customer list and prints a voucher in which the individual unique information of the customer is embedded as electronic watermark information on the medium supplied from the head office 921. (3) At the sales office 922, the printed voucher is sent to the user by direct mail. In this way, it is possible to issue a gift voucher that is a countermeasure against fraud at low cost.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above illustrated examples, and various modifications can be made without departing from the gist of the present invention. Of course.

Further, a program for realizing the functions of the ticket output device, the digital watermark detection device, the background printing machine, and the individual unique information printing machine disclosed in the present invention is recorded in a computer-readable recording medium, and A ticket output device, a digital watermark detection device, and a background of the present invention by causing a computer in a ticket output device, a digital watermark detection device, a background printing machine, and an individual unique information printing machine to read and execute the program recorded in a recording medium. You may perform the process which implement | achieves the function of a printing machine and an individual unique information printing machine.

The "computer-readable recording medium" means a flexible disk, a magneto-optical disk,
A portable medium such as a ROM or a CD-ROM, or a storage device such as a hard disk built in a computer system. Further, the "computer-readable recording medium" is a volatile memory (RAM) inside a computer system that serves as a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. As described above, the one that holds the program for a certain period of time is also included.

Further, the above program may be transmitted from a computer system storing the program in a storage device to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the "transmission medium" for transmitting the program means a medium for transmitting information such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.

Further, the above program may realize a part of the above-mentioned functions. Further, it may be a so-called difference file (difference program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

[0122]

As described above, according to the first aspect of the invention, a digital watermark is embedded in a tint block or background pattern of a medium such as a card or a ticket. As a result, a large amount of digital watermark information and a large amount of redundant components are included in a wide range of tint block and background patterns, and read failures are reduced. Therefore, it is not necessary to prepare a special ticket paper or the like for preventing forgery, and a plain paper printer can be used. In addition, there is no need to store and manage special ticket papers to prevent counterfeiting. Also. The effect of reducing the cost of issuing tickets such as tickets can be obtained.

According to the second aspect of the present invention, the characters or images are individually or individually separated from each other or on the ticket on which the background pattern in which the electronic watermark of the lot-specific information is embedded is printed in advance. A front pattern composed of both of the above is printed, and unique information for uniquely identifying a ticket or the like is embedded as a digital watermark in this front pattern. As a result, the physical forgery prevention effect that the paper is difficult to obtain can be achieved first, and
The digital watermark of the front pattern provides the effect of being able to achieve the double anti-counterfeiting effect.

According to the third aspect of the invention, a digital watermark is embedded in the tint block or background pattern of a medium such as a card or a ticket. As a result, a large amount of digital watermark information and a large amount of redundant components are included in a wide range of tint block and background patterns, and read failures are reduced. Therefore, it is not necessary to prepare a special ticket paper or the like for preventing forgery, and a plain paper printer can be used. In addition, there is no need to store and manage special ticket papers to prevent counterfeiting. Also. The effect of reducing the cost of issuing tickets such as tickets can be obtained.

Further, according to the invention described in claim 4, in addition to embedding a digital watermark in a tint block or background pattern of a card or a ticket, character information for identifying the ticket is printed on the front surface of the ticket. As a result, the information of the electronic watermark of the background pattern can be collated with the character information of the ticket or the like, and the validity of the ticket or the like can be easily confirmed.

According to the fifth aspect of the invention, the information specified by the ticket issuer is embedded in the front pattern as a digital watermark. As a result, the information of the electronic watermark embedded in the front pattern and the face information can be collated, and the security level can be improved.

According to the invention described in claim 6, background image data in which lot-specific information is embedded as a digital watermark is generated, and the image data with the digital watermark is mass-produced by a gravure printing machine or an offset printing machine. I decided to issue it cheaply. As a result, first, it is possible to obtain a physical forgery prevention effect that the paper is difficult to obtain.

According to the seventh aspect of the invention, the background image data in which the encrypted lot-specific information is embedded as a digital watermark is generated, and the image data with the digital watermark is printed by a gravure printing machine or offset printing. I decided to issue it in large quantities at a low price with a machine. This makes it possible to prevent the forgery from being easily forged because the encryption method is unknown even if the digital watermark information is published or leaked to the outside.

Further, according to the invention of claim 8, the characters or images are individually or individually separated from each other or on the ticket or the like on which the background pattern in which the electronic watermark of the lot-specific information is embedded is printed in advance. A front pattern composed of both of the above is printed, and individual unique information for uniquely identifying a ticket or the like is embedded as a digital watermark in this front pattern. As a result, a physical forgery prevention effect that paper is difficult to obtain is achieved first, and a double forgery prevention effect can be obtained by the digital watermark of the front pattern.

According to the present invention, the digital watermark information embedded in the tint block or background pattern printed on the medium such as a card or ticket is detected, and the character information printed on the surface of the medium is detected. By reading, the electronic watermark information and the character information are collated, and the collation result is output.By doing so, it is possible to collate the electronic watermark information embedded in the tint block or background pattern with the face information. The effect that the security level can be improved can be obtained.

According to the tenth aspect of the invention, the electronic watermark information is detected from the tint block or background pattern printed on the medium, and collated with the confidential information relating to the electronic watermark notified in advance by the medium issuer. I chose As a result, the confidential information of the issuer and the information of the digital watermark are compared, and the security level can be greatly improved.

According to the eleventh aspect of the present invention, the electronic watermark of the encrypted lot-specific information embedded in the background pattern of a medium such as a ticket or card is read, and its validity is confirmed. The digital watermark of the encrypted individual unique information embedded in the front pattern was read, its validity was confirmed, and the lot-specific information was compared with the corresponding data in the individual unique information.
This makes it possible to issue and use tickets and cards that have a significantly high anti-counterfeiting effect.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a model for preventing forgery of a card and a ticket according to the present invention.

FIG. 2 is a diagram for explaining a method of generating a message digest (MD).

FIG. 3 is a first diagram for explaining an encryption method and a decryption method.

FIG. 4 is a second diagram for explaining the encryption method and the decryption method.

FIG. 5 is a diagram for explaining encryption of digital watermark information.

FIG. 6 is a diagram illustrating a method of using a unique MD of a digital watermark.

FIG. 7 is a block diagram showing a configuration example of a basic ticket output device.

FIG. 8 is a processing flow for explaining the operation of the ticket output device shown in FIG.

FIG. 9 is a block diagram showing a specific configuration example of a ticket output device.

FIG. 10 is a block diagram showing a configuration example of a digital watermark detection device.

11 is a processing flow for explaining the operation of the digital watermark detection apparatus shown in FIG.

FIG. 12 is a block diagram showing a specific configuration example of a digital watermark detection device.

FIG. 13 is a block diagram showing a configuration example of a ticket output device equipped with a digital watermark information encryption function.

14 is a processing flow for explaining the operation of the ticket output device shown in FIG.

FIG. 15 is a block diagram showing a specific configuration example of a ticket output device having an encryption function.

FIG. 16 is a block diagram showing a configuration example of a digital watermark detection device compatible with encryption of watermark information.

17 is a processing flow for explaining the operation of the digital watermark detection apparatus shown in FIG.

FIG. 18 is a block diagram showing a specific configuration example of a digital watermark detection device compatible with encryption of digital watermark information.

FIG. 19 is a block diagram showing a configuration example of a ticket output device using an encryption key generated from a passphrase.

20 is a process flow for explaining the operation of the ticket output device shown in FIG.

FIG. 21 is a block diagram showing a specific configuration example of a ticket output device that supports encryption with a passphrase.

FIG. 22 is a block diagram showing a configuration example of a digital watermark detection device compatible with passphrase encryption.

23 is a processing flow for explaining the operation of the digital watermark detection apparatus shown in FIG.

FIG. 24 is a block diagram showing a specific configuration example of a digital watermark detection device compatible with passphrase encryption.

FIG. 25 is a diagram showing an example of a ticket issued by using a printing machine and a printer together.

FIG. 26 is a diagram showing an example of a card issued by using a printing machine and a printer together.

FIG. 27 is a diagram showing a schematic flow of background printing and individual printing.

FIG. 28 is a diagram showing a schematic processing flow of background printing.

FIG. 29 is a diagram showing a schematic processing flow of individual printing.

FIG. 30 is a block diagram illustrating a configuration example of a background printing machine.

FIG. 31 is a diagram showing a processing flow of background printing.

FIG. 32 is a block diagram illustrating a specific configuration example of a background printing machine.

FIG. 33 is a block diagram showing a configuration example of an individual unique information printing apparatus.

FIG. 34 is a diagram showing a processing flow of individual unique information printing.

FIG. 35 is a block diagram showing a specific configuration example of an individual unique information printing machine.

FIG. 36 is a block diagram showing a configuration example of a digital watermark detection device for lot-specific information and individual unique information.

FIG. 37 is a diagram showing a flow of a detection process of lot-specific information and individual-specific information.

FIG. 38 is a diagram showing a specific configuration example of the digital watermark detection device shown in FIG. 36.

FIG. 39 is a diagram showing a schematic flow when a user issues a ticket at home.

FIG. 40 is a diagram for explaining an example of a soccer ticket.

FIG. 41 is a diagram for explaining an example of a gift voucher.

[Explanation of symbols]

1 Convenience stores, etc. 2 network 3 ticket output device 4 background image database 5 printers 6 Ticketing information database 7 tickets or cards 8a digital camera 8b Handy scanner 9 Digital watermark detector 10 Ticketer Secret Information Database 20 Ticket output device 21 Digital Watermarked Image Data Generation Means 22 Character image generation means 23 Print Output Data Generation Means 24 Printing means 80 Digital Watermark Detection Device 81 Image scanning means 82 Digital Watermark Information Detection Means 83 Character detection means 84 Ticketer Confidential Information Storage Means 85 Data collating means 86 display means 130, 260 ticket output device 131,263 data combination means 132, 264 encryption means 133, 265 Digital Watermarked Image Data Generating Means 134, 266 Character image generation means 135, 267 Print output data generation means 136, 268 printing means 190, 340 Digital Watermark Detection Device 191, 341 Image scanning means 192, 342 Digital Watermark Information Detection Means 193,343 Character detection means 194, 345 Data combining means 195 encryption key information storage means 196, 348 encryption means 197, 349 Data collating means 198, 344 Ticketer secret information storage means 199,350 Display means 261 and 346 Passphrase input means 262, 347 Encryption key generation means 345 data combination means 348 encryption means 522, 533, 551 background printing machine 523 and 542 printers 552 encryption means 553 Image data generating means with digital watermark 554 Print output data generation means 555 printing means 631 Individual unique information printing device 632 image scanning means 633 electronic watermark information detection means 634 Lot-specific information confirmation method 635 encryption means 636 Image data generating means with digital watermark 637 Print output data generation means 638 printing means 731 Digital Watermark Detection Device 732 image scanning means 733 Background watermark electronic watermark reading means 734 Means for confirming lot-specific information 735 Digital watermark reading means of front pattern 736 Confirmation method of individual unique information 737 collation means 738 Collation result output means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Guo Somei             1-5-1 Taito, Taito-ku, Tokyo Toppan stamp             Imprint Co., Ltd. (72) Inventor Kenji Matsudo             1-5-1 Taito, Taito-ku, Tokyo Toppan stamp             Imprint Co., Ltd. (72) Inventor Takuya Oshige             1-5-1 Taito, Taito-ku, Tokyo Toppan stamp             Imprint Co., Ltd. F-term (reference) 2C061 AP00 AS12 CL10 JJ02 JJ14                 2H134 NA01                 5B057 AA11 BA02 CB19 CE08 CE09                       CG07 CH11 DC33                 5C076 AA14 BA06                 5J104 AA09 AA13 AA14 PA10 PA14

Claims (15)

[Claims] 1. A printing medium including at least a card or a ticket, wherein predetermined information designated by an issuer of the medium is embedded as digital watermark information in a tint block or background pattern printed on the medium. A medium on which a digital watermark is printed. 2. A printing medium including at least a card or a ticket, in which a background pattern in which digital watermark information of lot-specific information is embedded is printed, and a character or an image is independently or as a character on the background pattern. A medium on which a digital watermark is printed, in which a front pattern composed of both the image and the front pattern is embedded with individual unique information for uniquely identifying the medium as digital watermark information. 3. An electronic watermark containing background image data in which predetermined information designated by an issuer of this medium is embedded as electronic watermark information in a tint block or background pattern of a medium including at least a card or a ticket. Image data generating means, print output data generating means for generating print output data for printing the digital watermarked background image data on a medium, and printing means for printing the print output data on the medium. An electronic watermark printing device characterized by: 4. A second print output data generation method for generating second print output data for printing characters or images independently on a medium including at least a card or a ticket or for printing both characters and images as a front pattern. The electronic watermark printing apparatus according to claim 3, further comprising: a unit and a second printing unit that prints the second print output data on a medium. 5. The second print output data further comprises second digital watermark-embedded image data generating means for embedding predetermined information designated by a ticket issuer as digital watermark information in advance. Item 5. The digital watermark printing device according to item 4. 6. A digital watermark printing apparatus for printing a background pattern of a printing medium including at least a card or a ticket, wherein lot-specific information specified by an issuer of the medium is embedded as digital watermark information. Digital watermarked image data generating means for generating digital watermarked background image data, print output data generating means for generating print output data from the digital watermarked background image data, and printing the print output data on a printing medium A digital watermark printing device, comprising: 7. A digital watermark printing apparatus for printing a background pattern of a printing medium including at least a card or a ticket, and an encryption means for encrypting lot-specific information specified by an issuer of this medium. A digital watermark-embedded image data generating means for generating digital watermark-embedded background image data in which the encrypted lot-specific information is embedded as digital watermark information; and printout data generated from the digital watermark-embedded background image data. An electronic watermark printing apparatus comprising: a print output data generation unit; and a print unit that prints the print output data on a printing medium. 8. A digital watermark printing in which a character or an image is printed independently or a front pattern consisting of both the character and the image is printed on a medium on which a background pattern in which the digital watermark information of the lot-specific information is embedded is previously printed. A second digital watermarked image data generating unit that embeds individual unique information for uniquely identifying a medium in the front pattern as digital watermark information, and generates front image data with a digital watermark; A second print data generating unit that generates second print output data from the watermarked front image data; and a second printing unit that prints the second print output data on a medium. A characteristic digital watermark printing device. 9. A digital watermark detecting device for reading digital watermark information embedded in a tint block or background pattern printed on a medium and character information printed on the medium, wherein the medium is scanned to obtain digital image data. Image scanning means, digital watermark information detecting means for detecting digital watermark information embedded in a tint block or background pattern from the digital image data, and character detecting means for reading character information printed on a medium from the digital image data And a data collating unit that collates the detected digital watermark information with the character information, and an output unit that outputs a collation result obtained from the data collating unit. . 10. A digital watermark detection apparatus for reading digital watermark information embedded in a tint block or background pattern printed on a medium, comprising image scanning means for scanning the medium to obtain digital image data, and the digital image data. A digital watermark information detecting means for detecting digital watermark information embedded in a tint block or a background pattern; A digital watermark detecting device comprising: a data collating unit that collates the detected digital watermark information with the secret information; and an output unit that outputs a collation result obtained from the data collating unit. 11. The unique information for each lot, which is the digital watermark information in the background pattern printed on the medium including at least a card or a ticket, and the individual unique information, which is the digital watermark information in the front pattern, are read. An electronic watermark detection device, which is an image scanning means for scanning a medium to obtain digital image data, and a background pattern electronic device for detecting lot-specific information which is electronic watermark information in a background pattern from the digital image data. Watermark reading means, means for confirming the unique information by lot for confirming the validity of the electronic watermark information of the detected unique information by lot, and individual digital watermark information from the digital image data, which is the electronic watermark information in the front pattern. Front pattern electronic watermark reading means for detecting unique information, and electronic watermark of the detected individual unique information. Confirming means of individual unique information for confirming the correctness of the information, collating means for collating the lot-specific information with the individual unique information, and an output means for outputting a collation result obtained from the collating means, An electronic watermark detection device comprising: 12. An electronic watermark containing background image data in which predetermined information designated by an issuer of the medium is embedded as electronic watermark information in a tint block or background pattern of a medium including at least a card or a ticket. An image data generation procedure, a print output data generation procedure for generating print output data for printing the digital watermark embedded background image data generated by the digital watermark embedded image data generation procedure, and the print output data A digital watermark printing method comprising: a printing procedure for printing on a medium; 13. A digital watermark printing method for printing a background pattern of a printing medium including at least a card or a ticket, wherein lot-specific information specified by an issuer of the medium is embedded as digital watermark information. Digital watermark embedded image data generation procedure for generating digital watermark embedded background image data, print output data generation procedure for generating print output data from the digital watermark embedded background image data, and printing generated in the print output data generation procedure A digital watermark printing method comprising: a printing procedure for printing output data on a printing medium; 14. A digital watermark printing for printing a character or an image independently or a front pattern consisting of both the character and the image on a medium on which a background pattern in which the electronic watermark information of the lot-specific information is embedded is printed in advance. A second digital watermarked image data generation step of generating digital watermarked front image data by embedding individual unique information for uniquely identifying a medium in the front pattern as digital watermark information; A second print output procedure for generating second print output data from the watermarked front image data; and a print procedure for printing the second print output data generated by the second print output procedure on a medium. A digital watermark printing method comprising: 15. A digital watermark detection method for reading digital watermark information embedded in a tint block pattern or a background pattern printed on a medium and character information printed on the medium, wherein the medium is scanned to obtain digital image data. Image scanning procedure, digital watermark information detection procedure for detecting digital watermark information embedded in a tint block or background pattern from this digital image data, and character detection procedure for reading character information printed on a medium from this digital image data And a data collation procedure for collating the detected digital watermark information with the character information, and an output procedure for outputting a collation result obtained from the data collation procedure.