JP2002016597A - Data generation method and data separation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect data in such a way that parties other than prescribed users cannot use the data stored in a device or a recording medium as well as data that are being transmitted, by using the data with respect to fingerprints or the voice print of a prescribed user. SOLUTION: A protection data generating means 6 generates protection data, by directly imbedding information of a specific part of prescribed users, such as fingerprint data or information generated from a part of the bodies of the prescribed users, such as voice print to base data that are to be protected. Furthermore, a data-separation means uses the information of specific parts of the body of the prescribed users, such as the fingerprint data or the information generated from parts of the body of the prescribed users, such as voice print to separate the base data from the protection data, so as to allow only the prescribed users to utilize the base data contents.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology that allows only a predetermined user to use a specific part of the body such as a fingerprint or a voiceprint that can identify the predetermined user. The present invention relates to a data creation method for creating different data and a data separation method.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. 08-030 discloses a conventional technique for preventing unauthorized use of contents by using data such as fingerprint data that can identify a predetermined user.
Japanese Patent Application Publication No. 513 discloses a portable data storage device which stores predetermined fingerprint data in advance, and records and reproduces data when the fingerprint data is collated and matched. There are many techniques for fingerprint authentication, and most of them are means for registering a fingerprint of an individual in advance for the purpose of preventing unauthorized intrusion and unauthorized operation, and for identifying a person by collation.

[0003]

However, in the prior art, since the fingerprint data is stored in advance in the portable data storage device, the contents are always stored together with the fingerprint data and protected. Therefore, for example, it is impossible to protect content outside the portable data storage device during transmission, or content stored in a device or a recording medium that does not have a data protection function using fingerprint data, using such fingerprint data. It is possible.

The present invention uses a specific device, such as fingerprint data, of a specific part of a predetermined user's body, and information generated from a predetermined user's body, such as a voiceprint, by using a specific device,
The purpose is to create data that cannot be used by anyone other than the specified user, and to make the data usable, not only for data recorded on recording media, but also for data being transmitted. And

[0005]

In order to achieve the above object, according to the present invention, information on a specific part of a predetermined user's body, such as fingerprint data, and information generated from a part of the predetermined user's body, such as a voiceprint, are provided. Directly into the underlying data content you want to protect.

That is, according to the present invention, there is provided a data creating method for processing base data to create protected data which can be used only by a predetermined user, wherein the predetermined user can be identified. A data creation method for acquiring information on a specific part of the body of the predetermined user or information generated from the specific part and embedding the obtained information in the base data to create the protection data is provided. You.

In the present invention, information based on a specific portion of a predetermined user's body such as fingerprint data or data directly embedded with information generated from a part of the predetermined user's body such as a voiceprint is used as a basis. Separated so that only a predetermined user can use the underlying data.

That is, according to the present invention, there is provided a data creation method for processing base data to create protection data that can be used only by a predetermined user, wherein the predetermined user can be identified. Acquiring information on a specific part of the body of the predetermined user or information generated from the specific part, and embedding the obtained information in the base data, with respect to the protected data, A method of obtaining shape information of a specific part of the body or specific information generated from the specific part, and separating the base data from the protected data with reference to the obtained information.

DETAILED DESCRIPTION OF THE INVENTION <Data Creation Method> An embodiment of a data creation method according to the present invention will be described below with reference to the drawings. First, the configurations of the user side and the data supply side according to the data creation method and the data separation method of the present invention will be described. FIG. 5 shows an embodiment of the configuration on the user side and the data supply side according to the data creation method and the data separation method of the present invention. Here, the data supply side 1 is the communication line 3
A mode in which data is supplied to the user side 2 via the.
The data supply side 1 and the user side 2 are connected by a communication line 3 such as a dedicated line or a public line.

The data supply side 1 includes a data storage means 4 for storing underlying data (for example, contents such as image data and music data), a buffer memory 5 for storing fingerprint data received from the user side 2, And a communication interface 7 for performing communication with the user side 2. The user side 2 includes a fingerprint reading unit 8 for reading a user's fingerprint, a fingerprint data creating unit 9 for creating fingerprint data corresponding to the read fingerprint, and a communication unit for performing communication with the data supply side 1. It has an interface 10. Note that, in addition to the configuration of the data supply side 1 and the user side 2, as long as the data creation method and the data separation method of the present invention can be implemented, the present invention is not limited to the above configuration, and any configuration can be realized.

Next, an embodiment of a method in which the user side 2 transmits the fingerprint data and the desired data name to the data supply side 1 will be described. FIG. 1 is a flowchart showing one embodiment of the operation on the user side according to the data creation method of the present invention.
First, in step S101, the user (data applicant) inputs (or selects) a desired data name using the input unit 11. Next, in step S103,
The fingerprint is read by touching the fingerprint reading means 8 with the finger.
Then, in step S105, the fingerprint data creating means 9 converts the fingerprint read in step S103 into data, and creates fingerprint data. In step S107, the fingerprint data created in step S105 and the desired data name input in step S101 are transmitted to the data supply side 1. Note that it is also possible to create fingerprint data in advance and transmit that data in step S107.

Next, an embodiment of a method in which the data supply side 1 protects data using fingerprint data will be described. FIG.
5 is a flowchart showing an embodiment of the operation on the data supply side according to the data creation method of the present invention. First, in step S111, the fingerprint data and the desired data name sent from the user (data applicant) are received and stored in the buffer memory 5. Next, in step S113, data (base data) corresponding to the desired data name received in step S111 is read out of the data stored in the data storage unit 4, and step S1 is executed.
In step S15, the protected data creating means 6 adds the data read in step S113 to the underlying data in step S1.
The fingerprint data received in step 11 is embedded to create data protected by the fingerprint data (protected data). The method of embedding the fingerprint data will be described later in detail. Then, in step S117, the data (protected data) in which the fingerprint data is embedded is transmitted to the user (data applicant) side 2.

The above steps S101 to S11
By the operation of 7, the user can obtain the protection data in which the user's own fingerprint data is embedded in the desired data (base data). Although this protection data is stream data, even if the protection data is reproduced by considering it as image data or audio data, for example, it is impossible to normally reproduce the underlying data because the fingerprint data is embedded. is there.

Next, an embodiment relating to the creation of fingerprint data in step S105 will be described in detail. In order for the user's fingerprint to correspond to the fingerprint data in a one-to-one correspondence, the fingerprint image data of the fingerprint read in step S103 and the created fingerprint data must be in a one-to-one correspondence. There are many methods for creating fingerprint data from a user's fingerprint. Hereinafter, a pattern of the read fingerprint image data will be recognized, and a pattern to be classified among the prepared patterns will be determined. The method will be described.

First, as a first classification process, features of a fingerprint image read by the fingerprint reading means are extracted, and the fingerprint image is classified into one of 100 types of patterns prepared in advance. And it is expressed by a classification code for each pattern prepared in advance. In addition,
If there are 100 types of classified patterns,
The classification of the fingerprint image into one of the 100 types of patterns can be represented by 8-bit data.

Next, as a second classification process, a new feature of the fingerprint image is extracted and classified into one of 100 types of patterns different from the pattern used in the first classification process. Is also represented by 8-bit data. That is, the fingerprint image is classified into one of 10,000 types of patterns by combining the first classification process and the second classification process, and the classification is 8 bits + 8 bits = 16.
It is represented by bit data.

Further, as a third classification process, a new feature of the fingerprint image is extracted and classified into one of 100 types of patterns different from the patterns used in the first and second classification processes. Are represented by 8-bit data. As described above, the fingerprint image is classified into one of 1,000,000 kinds of patterns by the first to third classification processes, and this classification is 8 bits + 8 bits + 8 bits = 24.
It is represented by bit data. The 24-bit (3 bytes) data is used as fingerprint data.

In the fingerprint pattern classification method described above, the classification process is performed in three steps, and as a result, the fingerprint image data is classified into one of 1,000,000 types of patterns, and a 24-bit fingerprint is classified. Created data. However, the accuracy of the pattern classification (here, 1 million classifications)
It can be arbitrarily determined, and the length of the fingerprint data (here, 24 bits) also differs depending on the accuracy of the pattern classification. Further, in the above-described fingerprint pattern classification method, the classification process is divided into three times.
The number of times of this classification process can also be arbitrarily determined.

In the creation of fingerprint data by the above-described pattern classification, the reproducibility of creating identical fingerprint data from a user's fingerprint is high. Further, since the fingerprint data created by the pattern classification is not a fingerprint image but data of a code number based on the pattern classification, there is no possibility of misuse. Therefore, it is not necessary to store and manage the fingerprint data, and the fingerprint data to be embedded in the data is not specified. Therefore, there is little fear that fingerprint data is misused.

Next, an embodiment relating to the creation of protected data in step S115 will be described in detail. By repeatedly connecting the fingerprint data created as described above, stream data having the same length as the underlying data (content) to be embedded with the fingerprint data (hereinafter referred to as extended fingerprint data) Create The data synchronization circuit synchronizes the phase of the extended fingerprint data created as described above with the underlying data, and uses the two data as stream data as an Ex-OR circuit (Exclusive OR circuit: also called an exclusive OR circuit or XOR circuit). ).

As shown in FIG. 4, the Ex-OR circuit has input terminals A and B to which two variables are input and one output terminal Z, and only one of the input terminals A and B is provided. Is 1, the output from the output terminal Z is set to 1, and when the input variables of the input terminals A and B are equal, the output from the output terminal is set to 0. The stream data of the extended fingerprint data and the stream data of the underlying data (content) are input to each of the input terminals A and B, and the data output from the output terminal Z is used as protection data. This protected data is data in which extended fingerprint data is embedded in the underlying data, and this protected data is transmitted to the user. Note that, without using the Ex-OR circuit, it is also possible to create protected data by mixing fingerprint data and underlying data according to a predetermined rule.

In step S105, the user 2 creates the above-mentioned extended fingerprint data, and in step S107
It is also possible that the user side 2 transmits extended fingerprint data instead of fingerprint data to the data supply side. Also,
In the above-described creation of the protected data, extended fingerprint data having the same length as the base data is created. However, it is necessary to repeatedly input 24-bit fingerprint data to the Ex-OR circuit to create the protected data. Is also possible. In this case, there is no need to create extended fingerprint data having the same length as the base data, so there is no need to consider the length of the base data.

Further, the fingerprint data is repeated as it is Ex
Rather than input to the OR circuit, data obtained by modifying the fingerprint data by performing, for example, dividing fingerprint data into 4-bit units and adding 4 bits of “0” between the divided data. Can be input to the Ex-OR circuit, and the fingerprint data can be encrypted and used. In this case, since the fingerprint data is altered or encrypted, problems such as the user's fingerprint data being stolen can be suppressed. Further, in the above-described embodiment, the mode in which the data supply side 1 receives the fingerprint data from the user side 2 and creates the fingerprint data is described. For example, the personally created data is recorded in the recording unit. In doing so, it is also possible to perform protection using fingerprint data.

<Data Separation Method> Next, the data separation method of the present invention which separates the underlying data from the protected data created by the data creating method of the present invention and makes the underlying data usable is described. One such embodiment will be described.
FIG. 6 shows an embodiment of a data separation device according to the data separation method of the present invention. The data separating device 12 includes a fingerprint reading unit 13 for reading a user's fingerprint, a fingerprint data creating unit 14 for creating fingerprint data corresponding to the read fingerprint, and protection data (content) supplied from the data supply side 1. Data storage means 15 for storing
It has a data separating means 16 for separating the underlying data (content) from the protected data using the fingerprint data. The data separation device 12 generates fingerprint data in the same manner as in data creation, and separates the underlying data (contents) from the protected data using the fingerprint data, thereby performing data separation. The data separation device 12 is not limited to the above-described configuration, and can be implemented in any configuration as long as the data creation method and the data separation method of the present invention can be implemented.

FIG. 3 is a flowchart showing one embodiment of the operation of the user according to the data separation method of the present invention. First, in step S201, the user causes the fingerprint reader 13 to read a fingerprint by touching the finger. Next, in step S203, the fingerprint data creating unit 1
No. 4 creates fingerprint data from the fingerprint read in step S201. Then, in step S205,
The data separating unit 16 separates the fingerprint data portion and the underlying data (content) portion from the stored protection data using the fingerprint data created in step S203.

By the operations in steps S201 to S205, the user can obtain the underlying data (content) separated from the protected data and use the data. In order to separate the underlying data (content) from the protected data, data separation processing must be performed using fingerprint data of a predetermined user. Content) is impossible to retrieve.

Next, an embodiment of the separation of the underlying data in step S205 will be described in detail. When reproducing the protected data, the fingerprint data is used to separate the underlying data from the protected data. Then, the phase synchronization between the fingerprint data or extended fingerprint data and the protection data is obtained by the data synchronization circuit, and the two data are applied to the Ex-OR circuit as stream data. The data output from the Ex-OR circuit is the underlying data (contents), and this underlying data is sent to the playback unit to play back images and sounds. The fingerprint data in step S203 is the same as the creation of the fingerprint data in step S105 described above. When the fingerprint data embedded in the protected data is created according to a predetermined rule (for example, when the fingerprint data is encrypted), the data created according to the predetermined rule is stored in an Ex-OR circuit. Must be entered.

Further, in the above-described embodiment, information for identifying a user is created from a user's fingerprint. For example, in addition to a fingerprint, information for identifying each user such as voiceprint, iris, DNA, etc. It is also possible to use. These fingerprints, voiceprints, irises, DNA, etc. are different for each individual, and these fingerprints, voiceprints, irises,
It is assumed that information capable of identifying each individual can be created using DNA or the like.

[0029]

As described above, according to the present invention,
Since the fingerprint data of a predetermined user is directly embedded in the underlying data (content), for example, the content being transmitted or the content stored in a device or a recording medium that does not have a data protection function using fingerprint data. Can be protected by fingerprint data, and it is possible to prevent a person other than a predetermined user from using illegally copied data. Therefore, even if the content being transmitted is stolen due to the sale of the content in a network such as the Internet, the stolen third party cannot reproduce the content, and the content can be safely reproduced via the network. It will be possible to sell.

[Brief description of the drawings]

FIG. 1 is a flowchart showing one embodiment of a user-side operation according to a data creation method of the present invention.

FIG. 2 is a flowchart showing one embodiment of an operation on the data supply side according to the data creation method of the present invention.

FIG. 3 is a flowchart showing one embodiment of a user-side operation according to the data separation method of the present invention.

FIG. 4 is a diagram illustrating an Ex-OR circuit.

FIG. 5 is an embodiment of a configuration on a user side and a data supply side according to a data creation method and a data separation method of the present invention.

FIG. 6 is an embodiment of a data separation device according to the data separation method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Data supply side 2 User side 3 Communication line 4, 15 Data storage means 5 Buffer memory 6 Protected data creation means 7, 10 Communication interface 8, 13 Fingerprint reading means 9, 14 Fingerprint data creation means 11 Input means 12 Data separation device 16 Data separation means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G10L 17/00 H04L 9/00 673D 15/00 G10L 3/00 545A H04N 1/387 551G H04L 9/00 673A F term (reference) 5B057 CA12 CA16 CB12 CB16 CC01 CE08 5B085 AE25 5C076 AA14 BA06 5D015 AA03 KK01 5J104 AA01 AA13 AA14 KA01 KA16 NA02 NA05

Claims (2)

[Claims] 1. A data creating method for processing base data to create protected data that can be used only by a predetermined user, wherein the body of the predetermined user is identifiable to the predetermined user. A data creation method for acquiring the information of the specific part or the information generated from the specific part, and embedding the obtained information in the base data to create the protection data. 2. A data creation method for processing base data to create protected data that can be used only by a predetermined user, wherein the body of the predetermined user is identifiable to the predetermined user. The information of the specific part or the information generated from the specific part is acquired, and the acquired information is embedded in the base data. A data separation method for acquiring shape information or specific information generated from the specific portion, and separating the base data from the protected data with reference to the acquired information.