JP2005352786A - Electronic ticket vending method, electronic ticket vending/transferring method, server device, client device, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enables a user to transfer an electronic ticket without allowing his or her personal information to be known by others and to enable a transfer-destination user to securely use the transferred ticket without allowing it to be used by a person other than the transfer-destination. <P>SOLUTION: When the electronic ticket is purchased, a server stores a ticket ID for uniquely identifying the electronic ticket and user information on the ticket purchaser in a ticket information DB, and issues an electronic ticket having the ticket ID and user information electronically watermarked in a ticket image to the purchaser. When the purchaser transfers the ticket to another user, the transfer-destination user transmits the electronic ticket including the ticket image and his or her user information to a server. THe server reads the ticket ID and the user information of the ticket buyer out of the ticket image, and when matching with data of the ticket information DB is successful, the DB is updated to create and send a new electronic ticket to the transfer destination. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic ticket sales / transfer technique using the Internet or the like.

  An electronic ticket is an electronic version of a “right” such as an admission ticket or a voucher. Use of tickets in movie theaters and theaters by downloading electronic tickets purchased from Internet ticket sales sites, etc. to mobile phones and IC cards that support infrared communications, and reading electronic tickets using specific readers Is possible. In addition, digitalized rights can be issued / assigned / destroyed regardless of location or time.

  Conventionally, this type of electronic ticket transfer is performed in order to prove that a user (hereinafter referred to as a transfer source user) who transfers a ticket (to another person) uniquely identifies the ticket and is a ticket purchaser. Personal information such as a telephone number is transmitted to a user who is the ticket transfer destination (hereinafter referred to as the transfer destination user), and the transfer destination user is based on the received ticket ID and the personal information of the transfer source user. In addition, a method is used in which a corresponding electronic ticket is obtained and used by accessing a URL or the like from which the electronic ticket is obtained.

Further, the transfer source user once deposits the downloaded electronic ticket to the server device that manages the electronic ticket information, and the transfer destination user notifies the transfer source user of the personal information necessary for the ticket transfer process, and transfers The former user transmits the personal information of the transfer destination user notified from the transfer destination user and the corresponding ticket information to the server device as a transfer processing request, so that the server device is associated with the corresponding electronic ticket. The purchaser information is updated to personal information of the transferee user, and after the update process is completed, the transferee user accesses the server device with his / her personal information, and obtains and uses the corresponding electronic ticket. (For example, refer nonpatent literature 1).
@ Pia's “Electronic Ticket Download Service (Digipoke), PIA Corporation, [online], [February 24, 2004 search], Internet <http://etc.pia.co.jp/pia/html/guide. html>

  However, in the method in which the transfer destination user accesses the electronic ticket using the transfer source user information as in the former case, there is a problem that the transfer destination user's personal information is known to the transfer destination user. Furthermore, anyone who knows the ID that uniquely identifies the ticket and the personal information of the transfer source user can access the ticket, so the transfer source user or another third party can issue the ticket before the transfer destination user. If the user is used, the transfer destination user may not be able to use the ticket.

  On the other hand, when the method described in the latter non-patent document 1 is used, the purchaser information associated with the electronic ticket is rewritten with the personal information of the transfer destination user. However, although the possibility that the ticket can be used without the permission of the transfer destination user is low, there is a problem in that the transfer destination user has to give his / her personal information to the transfer source user at the time of transfer. Due to these problems, the transfer of tickets in the existing service assumes a transfer case between known users.

  In both the former and latter methods, the ticket transfer fee settlement processing is often performed independently of the ticket transfer sequence, and the responsibility for the ticket transfer fee settlement processing is left to the user involved in ticket transfer. It is often done.

  The present invention has been made in view of such circumstances of the prior art, and allows a user to transfer an electronic ticket without knowing his / her personal information by others, and the transfer has been performed. It is an object of the present invention to provide a new electronic ticket sales / transfer method and its server device, client device, and the like that make it possible for a transfer destination user to use the ticket without being used by a transfer destination user.

  In the present invention, an electronic ticket is handled as electronic data including image data (hereinafter referred to as a ticket image). When an electronic ticket is purchased, a ticket service provider issues a ticket ID that uniquely identifies the purchased electronic ticket, stores the ticket ID and user information of the ticket purchaser in a ticket information database, The ticket ID and the user information of the ticket purchaser are embedded invisible using the digital watermark technology to the ticket image, and the purchaser obtains an electronic ticket including the digital watermark embedded ticket image. To do.

  When a purchaser transfers a ticket to another user (hereinafter referred to as a transfer destination user), the transfer destination user obtains an electronic ticket including the ticket image from the purchaser, and the transfer destination user receives a ticket service provider. The ticket service provider transmits the electronic ticket and its user information, and the ticket service provider uses the ticket ID embedded as a digital watermark from the ticket image included in the received electronic ticket and the user of the ticket purchaser. Information, and when the ticket information corresponding to the read ticket ID and purchaser exists in the ticket information database, the user information of the purchaser in the corresponding ticket information is updated to the user information of the transfer destination user. The ticket ID and the user information of the transferee user are embedded invisible using digital watermark technology. The ticket image newly generated, the transfer destination user is to obtain the electronic ticket that includes the ticket image newly generated.

  Further, in the present invention, in addition to the above electronic ticket sales / transfer method, the following method is provided as a method when the ticket service agent performs the settlement processing of the electronic ticket transfer fee.

  When a purchaser transfers a ticket to another user (hereinafter referred to as a transfer destination user), the purchaser encodes the ticket ID, his / her user information, and the transfer amount of the ticket together. And the ticket transfer information is restored together with the two pieces of distribution information I / II and the distribution information I / II that can restore only the ticket ID and the ticket transfer amount using a secret sharing method or the like. Then, all of the ticket transfer information is divided into three pieces of distribution information III that can be restored, and the distribution information III is transmitted to the ticket service provider. On the other hand, the transfer destination user obtains the electronic ticket including the ticket image and the distribution information I / II from the purchaser, and the transfer destination user acquires the secret sharing method from the distribution information I / II. When the ticket ID and the ticket transfer amount are restored using decryption processing or the like, and the ticket ID and the ticket transfer amount are appropriate, the transfer destination user sends the electronic ticket and the ticket The distribution information I / II and the user information of the user are transmitted. The ticket service provider reads the ticket ID embedded as a digital watermark and the user information of the ticket purchaser from the ticket image included in the received electronic ticket, and uses the decryption process of the secret sharing method, etc. The ticket transfer information is restored from the distribution information I, II, and III, the ticket ID and user information pair read from the ticket image, and the ticket ID and user information pair included in the ticket transfer information restored from the distribution information. And the ticket information database includes ticket information corresponding to the pair of the ticket ID and user information, the user information of the purchaser in the corresponding ticket information is used as the user information of the transfer destination user. Update the ticket ID and the user information of the transferee user invisible using digital watermark technology Ticket image embedded newly generate, the transferee user to obtain the electronic ticket that includes the ticket image newly generated. The ticket service agent performs settlement processing for the transfer price generated between the purchaser and the transfer destination user according to the ticket transfer amount included in the restored ticket transfer information.

  According to the present invention, it becomes possible for a user to perform transfer processing of an electronic ticket without making his / her personal information known to others.

  In particular, for users who transfer tickets, it is possible to transfer tickets without depending on the distribution media for ticket transfers, and the transferred tickets are made public on P2P file sharing software, Internet websites, etc. Since the ticket transfer negotiation can be performed without using an intermediary such as the current auction site, the opportunity for ticket transfer increases.

  A user to whom a ticket is transferred can receive a reliable charging agent service and a ticket transfer service after confirming the ticket transfer amount even in a ticket transfer environment without an intermediary.

  For the service provider, it is possible to provide a ticket proof service and a billing agency service, and collect a fee related to ticket transfer between users from the user.

An outline of a suitable business model realized by the electronic ticket sales / transfer system of the present invention will be described with reference to FIG.
1. The ticket service provider registers the electronic ticket information to be sold in the electronic ticket sales / transfer system according to the present invention. The electronic ticket sales / transfer system issues an electronic ticket as electronic data that can be sold to a user based on the registered electronic ticket information.
2. User A purchases the electronic ticket and pays the ticket price to the ticket service provider through the electronic ticket sales / transfer system.
3. User A transfers the purchased electronic ticket to user B.
4). The user B transmits the transferred electronic ticket and his / her user information necessary for the ticket transfer process to the electronic ticket sales / transfer system, and the user B can use the update process of the electronic ticket purchaser information. The electronic ticket sales / transfer system is requested to reissue the electronic ticket. The electronic ticket sales / transfer system updates the purchaser information of the corresponding ticket and reissues the ticket, and transmits the reissued electronic ticket to the user B.
5. User B pays the electronic ticket sales / transfer system a sum of the price of the transferred electronic ticket and the fee for the purchaser information update process and ticket reissue process.
6). The electronic ticket sales / transfer system uses the transfer price settlement function to return to the user A the price of the electronic ticket out of the amount paid by the user B.
7). At the same time, the electronic ticket sales / transfer system returns the fee to the ticket service provider.

  The following is a case without a charging processing function. FIG. 2 shows a system configuration example of the electronic ticket sales / transfer system according to the first embodiment. The electronic ticket sales / transfer system includes a client device 10 of a ticket transfer source user, a client device 20 of a ticket transfer destination user, and a server device 30. The client device 10, the client device 20, and the server device 30 are: Connection is made via a communication network 40 such as the Internet.

  The client device 10 includes user information input means 11, ticket display means 12, and communication means 13. The user information input unit 11 provides a user information input unit such as a user ID and a password necessary for using the service provided by the server device 30. The ticket display unit 12 displays the electronic ticket obtained by the user on the client device 10 and enables the use of the electronic ticket. The communication unit 13 provides the client device 20 and the server device 30 with a communication unit for requesting and obtaining an electronic ticket and transferring the electronic ticket via the communication network 40.

  Similar to the client device 10, the client device 20 includes a user information input unit 21, a ticket display unit 22, and a communication unit 23. The user information input means 21 provides means for inputting user information such as a user ID and a password necessary for using the service provided by the server device 30. The ticket display means 22 displays the electronic ticket obtained by the user on the client device 20 and enables the use of the electronic ticket. The communication unit 23 provides the client device 10 and the server device 30 with a communication unit for requesting and obtaining an electronic ticket and transferring the electronic ticket through the communication network 40.

  The server device 30 includes user information management means 31, ticket sales information management means 32, ticket information management means 33, watermark embedding means 34, electronic ticket issuing means 35, watermark reading means 36, and communication means 37. , A user information DB 38, a ticket sales information DB 39, and a ticket information DB 3a.

  An example of the data structure of the user information DB 38 is shown in FIG. The user information DB 38 stores user information such as the user ID, password, name, and contact information of the user of the service provided by the server device 30.

  An example of the data structure of the ticket sales information DB 39 is shown in FIG. The ticket sales information DB 39 includes an event ID for uniquely identifying an electronic ticket event sold by the ticket service provider, event information indicating the content of the event, a sales price of the electronic ticket, and electronic ticket data. The storage location of image data (hereinafter referred to as ticket image) is stored.

  An example of the data structure of the ticket information DB 3a is shown in FIG. The ticket information DB 3a stores a ticket ID for uniquely identifying a ticket sold to the user, a user ID of the ticket purchaser, and an event ID of the sold ticket.

  Note that this embodiment does not particularly define the types of various information related to the sale / transfer of electronic tickets and the manner of recording. At a minimum, it is only necessary to record the association between a user who sells / transfers a ticket, a ticket to be sold / transferred, and a user uniquely determined for each ticket, as in this embodiment. Instead of managing the records with one DB, the management may be performed with only one DB, or a method of associating each ticket with the owning user as one file may be considered.

  The user information management means 31 of the server device 30 registers user information of service users and searches for user information in the user information DB 38. The ticket sales information management means 32 issues a ticket sales ID for various tickets sold by the ticket service provider, and registers ticket sales information and searches for ticket sales information in the ticket sales information DB 39. The ticket information management unit 33 issues a ticket ID for each electronic ticket purchased by the user, and registers ticket information, searches for ticket information, and updates ticket information in the ticket information DB 3a. The watermark embedding unit 34 embeds a ticket ID, ticket purchaser information, and the like in the ticket image using digital watermark technology. The electronic ticket issuing means 35 issues electronic ticket data that can be used by the user, including an embedded ticket image such as a ticket ID and ticket purchaser information. The watermark reading unit 36 reads information embedded in the ticket image included in the electronic ticket data using a digital watermark technique. The communication unit 37 provides the client unit 10 and the client unit 20 with a communication unit for receiving each service request, transmitting an electronic ticket, and the like via the communication network 40.

  Next, the overall operation of the electronic ticket sales / transfer system according to the first embodiment will be described.

<Preprocessing>
(1) User Registration Before using the service, a user who uses this service needs to register user information necessary for user authentication and electronic ticket purchase in advance. Therefore, the user inputs user information necessary for using the service provided by the server device 30 by using the user information input means 11 or 21 of the client device 10 or 20, and transmits the user information to the server device 30. The server device 30 uses the user information management means 31 to issue a user ID for uniquely identifying the user, associates the issued user ID with the received user information, and stores the user information DB 38 (FIG. 4). ).

(2) Registration of ticket sales information In the present invention, electronic ticket data is handled as electronic data including image data. In order to sell an electronic ticket, the ticket service provider needs to register image data included in the electronic ticket. Therefore, the ticket service provider transmits the event information necessary for selling the electronic ticket, the ticket sales price, and the image data corresponding to the electronic ticket to be sold to the server device 30. The server device 30 uses the ticket sales information management means 32 to issue an event ID for uniquely identifying the event of the ticket, the issued event ID, the received event information, the ticket sales price, and the reception The image data is stored in the ticket sales information DB 39 (FIG. 5) in association with the image data storage location.

(3) Disclosure of event information The server device 30 associates ticket information (event information, sales price, etc.) registered with the ticket sales information with the event ID, and the ticket service provider's web site that can be viewed by the ticket purchaser. Publish to

  After the pre-processing as described above, an electronic ticket issuance process when a user purchases a ticket, and an electronic ticket transfer process when a purchaser of an electronic ticket transfers a ticket to another user has the following sequence: To do.

<Electronic ticket issue sequence>
FIG. 8 shows an electronic ticket issuing sequence according to the embodiment of the present invention.

  A user who uses this service (assuming a user of the client device 10) designates electronic ticket information desired to be purchased from electronic ticket information that can be purchased from a ticket service provider's website or the like, and requests electronic ticket purchase. The event ID of the corresponding ticket is transmitted to the server device 30 (S01). At that time, the user ID input using the user information input means 11 and the password are also transmitted to the server device 30.

  The server device 30 searches the user information DB 38 (FIG. 4) for the user corresponding to the received user ID and password using the user information management means 31, and confirms the presence or absence of the corresponding user information. User authentication is performed (S02). If the user authentication is successful, the ticket information management unit 33 issues a ticket ID for uniquely identifying the purchased ticket (S03). The ticket information management means 33 associates the issued ticket ID, the user ID of the ticket purchaser, and the received event ID of the corresponding ticket, and stores them in the ticket information DB 3a (FIG. 6) (S04).

  The ticket sales information management means 32 acquires a ticket image corresponding to the purchased electronic ticket according to the image storage location stored in the ticket sales information DB 39 (FIG. 5) (S05). The watermark embedding unit 34 embeds the ticket ID and the user ID of the ticket purchaser in the acquired ticket image using the digital watermark technology (S06). The electronic ticket issuing means 35 issues electronic ticket data including the watermark-embedded ticket image (S07).

  The server device 30 uses the communication unit 37 to transmit the electronic ticket data issued by the electronic ticket issuing unit 35 to the client device 10 of the ticket purchaser (S08).

<Electronic ticket transfer sequence>
FIG. 9 shows an electronic ticket transfer sequence according to the first embodiment. When the electronic ticket issued by the electronic ticket issuing process is transferred by a ticket purchaser (hereinafter referred to as a transfer source user) to another user (hereinafter referred to as a transfer destination user), the ticket transfer process is performed in the sequence of FIG. . Even when transferring electronic tickets, the transferee user inputs the user ID and password using the user information input means 11 and 21 and receives user authentication before the ticket information is updated. Although it is necessary to keep it, it is omitted in FIG.

  The transfer source user uses the communication unit 13 of the client device 10 to transmit the transfer target electronic ticket to the transfer destination user (S10). The transfer destination user uses the communication unit 23 of the client device 20 to transmit the received electronic ticket and user ID to the server device 30 as a ticket transfer update request (S11).

  Upon receiving the ticket transfer update request, the server device 30 uses the watermark reading unit 36 to read the digital watermark information embedded in step S06 of FIG. 8 from the ticket image included in the received electronic ticket (S12). . It is determined whether or not the ticket ID and the user ID of the ticket purchaser can be read by this digital watermark reading process (S13). If the ticket ID cannot be read, the communication means 37 is used to notify the processing impossible notification. The message is transmitted to the transfer destination user, and the process is terminated. If it can be read, the corresponding ticket information is searched from the ticket information DB 3a (FIG. 4) using the ticket information management means 33 based on the read ticket ID and user ID ( S14). Then, it is determined whether or not the corresponding ticket information exists in the ticket information DB 3a (S15). If the ticket information does not exist, the communication means 37 is used to transmit a process impossible notification to the transfer destination user and the process ends. .

  If the ticket information exists in the ticket information DB 3a, the ticket information management means 33 receives the user ID of the ticket information in the ticket information DB 3a (FIG. 6) in the electronic ticket transfer update request in step S11. The user ID of the transfer destination user is updated (S16). The watermark embedding unit 34 embeds the ticket ID and the user ID of the transfer destination user in the image data included in the corresponding electronic ticket data using the digital watermark technology (S17). The electronic ticket issuing means 35 issues electronic ticket data including the watermark-embedded ticket image (S18).

  The server device 30 uses the communication unit 37 to transmit the electronic ticket data issued by the electronic ticket issuing unit 35 to the client device 20 of the transfer destination user (S19).

  The following is a case with a charge processing function. FIG. 3 shows a system configuration example of an electronic ticket sales / transfer system according to the second embodiment. The electronic ticket sales / transfer system includes a client device 10 of a ticket transfer source user, a client device 20 of a ticket transfer destination user, and a server device 30. These client device 10, client device 20, and server device 30 are connected to the Internet. Or the like via a communication network 40.

  The client device 10 includes user information input means 11, ticket display means 12, distribution information generation means 13, and communication means 14. The user information input unit 11 provides a user information input unit such as a user ID and a password necessary for using the service provided by the server device 30. The ticket display unit 12 displays the electronic ticket obtained by the user on the client device 10 and enables the use of the electronic ticket. The distribution information generation unit 13 divides arbitrary electronic data into a plurality of different electronic data using a secret sharing method or the like. Here, it is impossible to guess the electronic data before the division of each of the plurality of divided data, but by restoring some of the plurality of data in a specific combination The electronic data before division can be partially or entirely restored. The communication unit 14 provides the client device 20 and the server device 30 with a communication unit for requesting and obtaining an electronic ticket and transferring the electronic ticket through the communication network 40.

  As with the client device 10, the client device 20 includes a user information input unit 21, a ticket display unit 22, a distribution information restoration unit 23, and a communication unit 24. The user information input means 21 provides means for inputting user information such as a user ID and a password necessary for using the service provided by the server device 30. The ticket display means 22 displays the electronic ticket obtained by the user on the client device 20 and enables the use of the electronic ticket. The distribution information restoration unit 23 decodes some of the plurality of pieces of distribution information generated by using the distribution information generation unit 13 of the client device 10 in a specific combination, thereby obtaining one piece of electronic data before division. Restore part or whole. The communication unit 24 provides the client device 10 and the server device 30 with a communication unit for requesting and obtaining an electronic ticket and transferring the electronic ticket through the communication network 40.

  The server device 30 includes user information management means 31, ticket sales information management means 32, ticket information management means 33, watermark embedding means 34, electronic ticket issuing means 35, watermark reading means 36, and distribution information restoring means. 37, transfer information management means 38, settlement means 39, communication means 3a, user information DB 3b, ticket sales information DB 3c, ticket information DB 3d, and transfer information DB 3e.

  An example of the data structure of the user information DB 3b is shown in FIG. The user information DB 3b stores user information such as the user ID, password, name, and contact information of the user of the service provided by the server device 30.

  An example of the data structure of the ticket sales information DB 3c is shown in FIG. In the ticket sales information DB 3c, an event ID for uniquely identifying an electronic ticket event sold by a ticket service provider, event information indicating the content of the event, a sales price of the electronic ticket, and an image included in the electronic ticket data The storage location of data (hereinafter referred to as ticket image) is stored.

  An example of the data structure of the ticket information DB 3d is shown in FIG. The ticket information DB 3d stores a ticket ID for uniquely identifying a ticket sold to the user, a user ID of the ticket purchaser, and an event ID of the sold ticket.

  An example of the data structure of the transfer information DB 3e is shown in FIG. In the transfer information DB 3e, a transaction ID that uniquely identifies transfer processing, a ticket ID of a transferred ticket, and a ticket transfer source user for a ticket transfer action between users performed using the server device 30 In addition, the user ID of the transfer destination user, the ticket transfer amount, and the like are stored.

  Note that this embodiment does not particularly define the types of various information related to the sale / transfer of electronic tickets and the manner of recording. At a minimum, it is only necessary to record the association between a user who sells / transfers a ticket, a ticket to be sold / transferred, and a user uniquely determined for each ticket, as in this embodiment. Instead of managing the records with one DB, the management may be performed with only one DB, or a method of associating each ticket with the owning user as one file may be considered.

  In addition, although it is not always necessary to record ticket transfer information in the present invention, it is desirable to record it in order to refer to and modify transfer details later or to perform post-processing such as tabulation. In this embodiment, the transfer information DB is configured as one DB. However, the transfer information DB may be divided into a plurality of DBs and files, and is not limited to the data configuration of the present embodiment.

  The user information management means 31 of the server device 30 registers the user information of the service user and searches for user information with respect to the user information DB 3b (FIG. 4). The ticket sales information management means 32 issues ticket sales IDs for various tickets sold by the ticket service provider, and registers ticket sales information and searches for ticket sales information with respect to the ticket sales information DB 3c (FIG. 5). Do. The ticket information management means 33 issues a ticket ID for each electronic ticket purchased by the user, and registers ticket information, searches for ticket information, and updates ticket information with respect to the ticket information DB 3d (FIG. 6). Do. The watermark embedding unit 34 embeds a ticket ID, ticket purchaser information, and the like in the ticket image using digital watermark technology. The electronic ticket issuing means 35 issues electronic ticket data that can be used by the user, including an embedded ticket image such as a ticket ID and ticket purchase information. The watermark reading unit 36 reads information embedded in the ticket image included in the electronic ticket data using a digital watermark technique. These means are basically the same as those of the first embodiment shown in FIG.

  The distribution information restoring unit 37 decodes some of the plurality of pieces of distribution information generated by using the distribution information generation unit 13 of the client device 10 in a specific combination, so that one piece of electronic data before division is obtained. Restore part or whole. The transfer information management means 38 issues a transaction ID for transfer of electronic tickets between users, registers transfer information in the transfer information DB 3e (FIG. 7), searches transfer information, and updates transfer information. I do. The settlement means 39 collects the ticket transfer fee from the transfer destination user and returns the ticket transfer fee to the transfer source user based on the transfer information of the electronic ticket stored in the transfer information DB 3e (FIG. 7). The communication unit 3 a provides the client device 10 and the client device 20 with a communication unit for receiving each service request, transmitting an electronic ticket, and the like via the communication network 40.

  Next, the overall operation of the electronic ticket sales / transfer system according to the second embodiment will be described.

<Preprocessing>
This is basically the same as in the case of the first embodiment.
(1) User Registration Before using the service, a user who uses this service needs to register user information necessary for user authentication and electronic ticket purchase in advance. Therefore, the user inputs user information necessary for using the service provided by the server device 30 by using the user information input means 11 or 21 of the client device 10 or 20, and transmits the user information to the server device 30. The server device 30 uses the user information management unit 31 to issue a user ID for uniquely identifying the user, associates the issued user ID with the received user information, and stores the user information DB 3b (FIG. 4). ).

(2) Registration of ticket sales information In the present invention, electronic ticket data is handled as electronic data including image data. In order to sell an electronic ticket, the ticket service provider needs to register image data included in the electronic ticket. Therefore, the ticket service provider transmits the event information necessary for selling the electronic ticket, the ticket sales price, and the image data corresponding to the electronic ticket to be sold to the server device 30. The server device 30 uses the ticket sales information management means 32 to issue an event ID for uniquely identifying the event of the ticket, the issued event ID, the received event information, the ticket sales price, and the reception The image data is stored in the ticket sales information DB 3c (FIG. 5) in association with the image data storage location.

(3) Disclosure of event information The server device 30 associates ticket information (event information, sales price, etc.) registered with electronic ticket sales information with an event ID, and is a ticket service provider's web site that can be viewed by the ticket purchaser. To the public.

  After the pre-processing as described above, an electronic ticket issuance process when a user purchases a ticket, and an electronic ticket transfer process when a purchaser of an electronic ticket transfers a ticket to another user has the following sequence: To do.

(Electronic ticket issue sequence)
FIG. 8 shows an electronic ticket issuing sequence according to the embodiment of the present invention. This electronic ticket issuing sequence is the same in both the first embodiment and the second embodiment.

  A user who uses this service (assuming a user of the client device 10) designates electronic ticket information desired to be purchased from electronic ticket information that can be purchased from a ticket service provider's website or the like, and requests electronic ticket purchase. The event ID of the corresponding ticket is transmitted to the server device 30 (S01). At that time, the user ID input using the user information input means 11 and the password are also transmitted to the server device 30.

  The server device 30 searches the user information DB 3b (FIG. 4) for the user corresponding to the received user ID and password from the user information DB 3b (FIG. 4) using the user information management means 31, and confirms the presence or absence of the corresponding user information. User authentication is performed (S02). If the user authentication is successful, the ticket information management unit 33 issues a ticket ID for uniquely identifying the purchased ticket (S03). The ticket information management means 33 associates the issued ticket ID, the user ID of the ticket purchaser, and the received event ID of the corresponding ticket, and stores them in the ticket information DB 3d (FIG. 6) (S04).

  The ticket sales information management means 32 acquires a ticket image corresponding to the purchased electronic ticket according to the image storage location stored in the ticket sales information DB 3c (FIG. 5) (S05). The watermark embedding unit 34 embeds the ticket ID and the user ID of the ticket purchaser in the acquired ticket image using the digital watermark technology (S06). The electronic ticket issuing means 35 issues electronic ticket data including the watermark-embedded ticket image (S07).

  The server device 30 uses the communication unit 37 to transmit the electronic ticket data issued by the electronic ticket issuing unit 35 to the client device 10 of the ticket purchaser (S08).

(Electronic ticket transfer sequence)
10 and 11 show an electronic ticket transfer sequence according to the second embodiment. When an electronic ticket issued by the electronic ticket issuing process is transferred by a ticket purchaser (hereinafter referred to as a transfer source user) to another user (hereinafter referred to as a transfer destination user), the ticket transfer is performed in the sequence of FIG. 10 or FIG. Process. In the transfer of the electronic ticket, the transfer source user gives the user ID and password to the user information input means 11, 21 before the ticket transfer declaration and the transfer destination user updates the ticket information. However, it is omitted in FIGS. 10 and 11.

The transfer source user uses the distribution information generation unit 13 of the client device 10 to electronically encode the electronic data indicating the ticket ID of the ticket to be transferred, his / her user ID, and the transfer amount. Data (hereinafter referred to as ticket transfer information) is generated, and the generated ticket transfer information is divided into three distribution information under the following conditions to generate distribution information (S21).
The divided three pieces of distribution information are referred to as distribution information I, distribution information II, and distribution information III, respectively. When the distribution information restoring unit 23 of the client device 20 or the distribution information restoring unit 35 of the server device 30 is used to decrypt the combination of the distribution information I and the distribution information II, only the transfer amount of the ticket transfer information is obtained. Restored. If the same means is used to decrypt all three pieces of distribution information, all of the ticket transfer information is restored.

  The transfer source user transmits the user ID and the distribution information III to the server device 30 as a ticket transfer report using the communication unit 24 of the client device 10 (S22).

  The process of step S22 means that the transfer source user has permitted transfer of the purchased electronic ticket. However, at this time, the transfer destination user may or may not be specified. That is, in this embodiment, it is assumed that the electronic ticket can be transferred in one of the two ticket transfer modes shown in FIGS. 10 and 11.

  FIG. 10 shows a case where an electronic ticket is transferred by designating a specific transfer destination user such as an acquaintance or a user who has already completed transfer negotiation using an auction site (hereinafter referred to as case 1). FIG. 11 shows a case where an electronic ticket to be transferred is disclosed to an unspecified number and transferred to a user using a web site or P2P file exchange software (hereinafter referred to as case 2).

  In the case of the transfer form of case 1, the transfer source user transmits the transfer target electronic ticket and the distribution information I and II to the transfer destination user (S23 in FIG. 10). In the case of the transfer form of case 2, the transfer source user publishes the electronic ticket to be transferred and the distribution information I and II on a web site that can be browsed by other users, P2P file exchange software, and the like. The previous user obtains the published electronic ticket (ticket image / distribution information I, II) using the web site, P2P file exchange software, or the like (S23 ′ in FIG. 11). The subsequent processing sequence is the same for cases 1 and 2 in FIGS.

  The transfer destination user uses the distribution information restoring means 23 of the client device 20 to perform decryption processing with the combination of the distribution information I and the distribution information II acquired in step S10 or step S10 ′, and transfers the transfer amount of the electronic ticket. Is restored (S24). The transfer destination user confirms the transfer amount of the ticket, and if appropriate, uses the communication means 24 to send the acquired electronic ticket, distribution information I, II, and user ID as a ticket transfer update request. It transmits to the apparatus 30 (S25).

  When the server device 30 receives the ticket transfer update request from the transfer destination user, the watermark reading unit 36 is used to extract the digital watermark information embedded in step S06 in FIG. 8 from the ticket image included in the received electronic ticket. Read (S26). Then, it is determined whether or not the ticket ID and the ticket purchaser's user ID can be read (S27). If the ticket ID and the ticket purchaser's user ID cannot be read, the communication means 3a is used to send a processing impossible notification to the transfer destination user. Then, the process ends.

  When the ticket ID and the user ID of the ticket purchaser can be read out, the server device 30 uses the distribution information restoring means 37, and the distribution information III received from the client device 10 of the transfer source user in step S22; In step S25, decryption processing is performed in combination with the distribution information I and II received from the client device 20 of the transfer destination user to restore all the ticket transfer information (S28).

  It is determined whether or not the ticket transfer information can be restored by the ticket transfer information restoration process (S29). If the ticket transfer information cannot be restored, the communication means 39 is used to transmit a process impossible notification to the transfer destination user. The process is terminated.

  If the distribution information I and II for which the fictitious transfer amount can be restored is forged by the transfer destination user by this processing, the ticket transfer information cannot be restored using a combination of the information and the distribution information III. The subsequent transfer process is not performed. Further, the transfer source user cannot change the transfer amount after the ticket transfer or the public declaration process in step S21. Therefore, it becomes possible to perform the settlement processing described later with a legitimate ticket transfer amount agreed by the ticket transfer source user and the ticket transfer destination user.

  When the electronic ticket transfer information is restored, the server device 30 sets the ticket ID and user ID read from the ticket image in step S26, and the ticket ID and user ID set included in the ticket transfer information restored in step S28. Are matched or mismatched (S30). If they do not match, the communication means 3a is used to transmit a process impossible notification to the transfer destination user, and the process ends.

  If the watermark information and the restoration information match, the server device 30 searches the ticket information DB 3d (FIG. 6) for ticket information corresponding to the combination of the ticket ID and the user ID using the ticket information management means 33. (S31). Then, it is determined whether or not the corresponding ticket information exists in the ticket information DB 3d (S32). If the ticket information does not exist, the communication means 3a is used to transmit a process impossible notification to the transfer destination user, and the process is terminated.

  When the corresponding ticket information exists in the ticket information DB 3d (FIG. 6), the processing after step 33 is performed. With this process, in the case of the ticket transfer form of case 2, the public electronic ticket and distribution information are acquired, and the electronic ticket transfer process is performed for the user who made the ticket information update request earliest. Will be.

  The ticket information management means 33 updates the user ID of the ticket information in the ticket information DB 3d (FIG. 6) with the user ID of the transfer destination user received in step S25 (S33). The watermark embedding unit 34 embeds the ticket ID and the user ID of the transfer destination user in the image data included in the corresponding electronic ticket data using the digital watermark technology (S34). The electronic ticket issuing means 35 issues electronic ticket data including the ticket image with watermark embedded generated in step S34 (S35). And the server apparatus 30 transmits the electronic ticket issued by step S35 with respect to the client apparatus 20 of a transfer destination user using the communication means 3a (S36).

  After completion of the electronic ticket transmission process for the transfer destination user, the transfer information management unit 38 issues a transaction ID for uniquely identifying the transfer process, the issued transaction ID, the ticket ID to be transferred, and the transfer source. The user ID of the user, the user ID of the transfer destination user, the transfer date and time, the transfer amount, and the settlement processing status “0: unprocessed” are associated and registered in the transfer information DB 3e (FIG. 7) (S37).

  The settlement means 39 notifies the transfer destination user registered in the transfer information DB 3e of the ticket transfer process and collects the transfer price at the same time (S38). The transfer price is collected from the user information DB 3b by using the user information management means 31 and the user's payment method corresponding to the user ID of the transfer destination user. After the collection of the transfer price is completed, the value of the settlement process status item of the transfer information in the transfer information DB 3e is updated to “1: unreturned process”.

  The settlement means 39 returns the ticket transfer fee collected in step S38 to the transfer source user (S39). The corresponding transfer information is searched from the transfer information DB 3e, the user ID of the transfer source user is acquired, and the user settlement method corresponding to the acquired user ID is retrieved from the user information DB 3b using the user information management means 31. Acquire and transfer the transfer price according to the acquired payment method. After the transfer price has been returned, the value of the settlement processing status item of the transfer information in the transfer information DB 3e is updated to “2: processed”.

<Secret sharing method>
The secret sharing method used in the second embodiment will be described below. The present invention relates to a restoration control-type secret described in Japanese Patent Application No. 2003-366538, which is an extension of the (k, n) threshold secret sharing method and the (d, k, n) threshold secret sharing method. A so-called threshold secret sharing method such as an information sharing method is used.

The (k, n) threshold secret sharing method is an integer distribution number n of 2 or more, which is the number of distributed information distribution, and an integer of 2 or more, n or less, which is the minimum number of distributed information necessary for restoring the secret information S. (K−1) degree polynomial f (x) with secret information S as a constant term
f (x) = S + r1x +... rk-1xk-1 mod p (1)
(R1,..., Rk-1: random number, p: prime number), and the secret information distributor who owns or distributes the original secret information S by deposit is each shared information holder i (i = 1, 2,..., N), distributed information Wi = f (i) is distributed.

  This (k, n) threshold secret sharing method can restore the original secret information S by solving simultaneous equations relating to f (x) if any k pieces of distributed information are gathered among n pieces of shared information. However, there is a feature that the original secret information S cannot be restored because the simultaneous equations relating to f (x) cannot be solved even if up to (k−1) pieces of distributed information are collected. Therefore, even if up to (n−k) pieces of shared information are lost or destroyed, the original secret information S can be restored, and up to (k−1) pieces of shared information can be obtained by leakage or theft. However, it is possible to realize a method for safely storing the secret information in which the original secret information S cannot be restored.

The (d, k, n) threshold secret sharing method is an extension of the above (k, n) threshold secret sharing method, and is an integer number n of 2 or more, which is the number of distributed information distribution, and the secret information S. An integer threshold value k of 2 or more and n or less, which is the minimum number of shared information necessary for complete restoration of the information, and a shortage number of shared information that allows partial restoration of the secret information S with respect to the threshold value k 2 The secret information S is divided into S ₀ , S ₁ ,..., S _d−1 from an integer division number d of k or less, and the divided secret information (division information) is a constant term (k−1). ) The following polynomial f (x)
f (x) = S ₀ + S _1x + ... S _d-1 xd-1r _1x d + ... rk-dk-1 mod P
... (2)
(R ₁ ,..., R _k-d : random number, p: prime number), and the secret information distributor who owns or distributes the original secret information S by deposit is each shared information holder i that stores the distributed information. The distributed information W _i = f (i) is distributed to (1 = 1, 2,..., N).

This (d, k, n) threshold secret sharing method is similar to the (k, n) threshold secret sharing method described above. If any k pieces of shared information are gathered among n pieces of shared information, f ( The original secret information S can be restored by solving the simultaneous equations relating to x), but the simultaneous equations relating to f (x) cannot be solved even if any (k−d) pieces of distributed information are collected. The secret information S cannot be restored. However, when any (k−d + 1) to (k−1) pieces of distributed information are collected, the division information S ₀ , S ₁ ,..., S _{d−1 is} obtained from simultaneous equations relating to f (x). Since the relational expression is obtained, possible values can be obtained as the pieces of divided information S ₀ , S ₁ ,..., S _d−1 , and the original secret information S can be partially restored.

  The (k, n) threshold secret sharing method and the (d, k, n) threshold secret sharing method are described in detail in “A. Shamir,“ How to Share a Secret ”, Commun. Of ACM, Vol. 22, No. 11, pp. 612-613, 1979 ”and“ GR Blakley, C. Meadows, “Security of ramp schemes”, Proc. Of Crypto '84, Lecure Notes on Computer. Sci., 196, pp. 242-268, 1984 ".

The restoration control type secret information distribution method is a method further expanding the (k, n) threshold secret distribution method and the (d, k, n) threshold secret distribution method, and any k pieces of n pieces of distributed information. The original secret information S can be restored by solving simultaneous equations relating to f (x), but even if there are up to (k−d) pieces of distributed information, simultaneous information relating to f (x) can be obtained. Since the equation cannot be solved, the original secret information S cannot be restored. However, by defining a distribution function for distributing information in a specific format, when any (k−d + 1) to (k−1) pieces of distributed information are arranged in a specific combination, f (x ), The specific division information S ₀ , S ₁ ,..., S _d−1 can be obtained, and the original secret information S can be partially restored.

This restoration control type secret information distribution method is basically based on the threshold value k and the threshold value k, which are two or more integers, which is the minimum number of shared information necessary for complete restoration of the secret information S. An integer division number d of 2 or more and k or less that determines the number of shared information deficiencies that allow partial restoration of the secret information S, and d pieces of division information S ₀ , S _{1 ,.} Enter the conditions for distributing the secret information S such as _-1 .
A prime number p larger than the maximum division information S _t (0 ≦ t ≦ d−1), and a random number r _i (1 ≦ 1 ≦ k−d) smaller than the prime number p and not 0 (k−d), (K (k−1) / 2) random numbers a _j (1 ≦ j ≦ k (k−1) / 2) are generated,
f (x) = S ₀ + S ₁ (x−a ₁ ) +... + S _d−1 (x−a _{(d−1) (d−2) / 2 + 1} ) (x−a _{(d−1) (d− 2) / 2 + 2) ...} (x-a (d-1) (d-2) / 2 + d-1) + r 1 (x-a d (d-1) / 2 + 1) (x-a d (d-1) _{/ 2 + 2)} ... (x- _{ad (d-1) / 2 + d} ) + ... + rk _-d (x-a _{(k-1) (k-2) / 2 + 1} ) (x-a _{(k-1) ( k-2) / 2 + 2} ) (x-a _{(k-1) (k-2) / 2 + k-1} ) mod P (3)
The shared information f (x) of the secret information S expressed by the following formula is generated.

For example, when the dispersion function f (x) in the above formula (3) is k = 3 and d = 2,
f (x) = S0 + S1 (x-a1) + r (X-a2) (x-a3) mod P (4)
The simultaneous equations for any two pieces of distributed information Wx and Wx + b (x> 0, b> 0) can be expressed by the following determinant.

上記行列式の左項を掃き出し法により変形すると、

When the left term of the above determinant is transformed by the sweep method,

となり、ａ_１，ａ_２，ａ_３の値によっては−ｘ^２＋（２ａ_１−ｂ）＋ａ_１ｂ−ａ_１ａ_２−ａ_１ａ_３＋ａ_２ａ_３＝０，もしくは２ｘ＋ｂ−ａ_２−ａ_３＝０を満たすｘとｂがある場合に、連立方程式から分割情報（部分情報）のＳ_０のみ、もしくはＳ_１のみを求めることができる。

Depending on the values of a ₁ , a ₂ , and a ₃ , −x ² + (2a ₁ −b) + a ₁ b−a ₁ a ₂ −a ₁ a ₃ + a ₂ a ₃ = 0, or 2x + b−a ₂ − When there are x and b satisfying a ₃ = 0, only S _{0 of the} division information (partial information) or only S ₁ can be obtained from the simultaneous equations.

<Distribution information generation processing>
Next, the distribution information generation processing in step S21 in the ticket transfer sequence of FIGS. 10 and 11 will be described in detail. In the following, it is assumed that the restoration control type secret information distribution method described in Japanese Patent Application No. 2003-366538 is used.

  It is assumed that the transfer source user negotiates with the transfer destination user about the ticket to be transferred and determines the transfer amount with mutual agreement. In the client device 10, the user information input means 11 receives and encodes the user ID, password, ticket ID to be transferred and transfer amount by the transfer source user, forms ticket transfer information, and stores it in the internal memory or the like. Remember. In this embodiment, it is assumed that “endo” is input as the user ID, “gu8she3” as the password, “T0000000l” as the ticket ID, and “2500” as the transfer amount. The encoding results are “656E646F2020”, “67753873865653300”, “54303030303030331”, and “3032353030”, respectively. A configuration example of ticket transfer information in the present embodiment is shown in FIG.

  The present embodiment does not particularly define the configuration of the ticket transfer information and the encoding method for the input value.

  In this embodiment, the ticket transfer information is composed of a 6-byte user ID, an 8-byte password, a 9-byte ticket ID of the ticket to be transferred, and a 5-byte transfer amount. The information that enables authentication, the information that makes it possible to identify the ticket to be transferred, and the information that clarifies the amount related to the transfer of the ticket need to be included in a minimum length. The configuration is not limited to the example.

  Further, the ticket configuration information may include other information. For example, a configuration including a transfer expiration date, identification of a transfer destination user, and a transfer confirmation password or password may be considered. Further, as an encoding method, the present embodiment encodes an input value using a shift JIS code. For an input that is less than a specified length, 20 indicates a blank, 00 indicates no input, and 0 represents a number. 30 is given, but other encoding methods and methods may be used, and the security of the ticket transfer information is enhanced by using a means such as calculating a hash value or encrypting it. Things can also be considered.

  Further, the present invention does not particularly define a method and format for inputting a user ID, a password, a ticket ID to be transferred, and a transfer amount. The user ID and password recorded in advance on the client device 10 or on an external recording medium such as an IC card may be input as a file, or the ticket ID to be transferred is the ticket information of the ticket to be transferred or You may make it acquire from a ticket image.

  The ticket display means 12 displays the ticket information such as the input ticket ID and the ticket image as information related to the ticket to be transferred. The present embodiment does not particularly define the content displayed on the ticket display means 12. The transfer source user only needs to be able to confirm the minimum information regarding the ticket to be transferred. For example, the transfer amount may be displayed.

  Next, the distribution information generation means 13 generates distribution information I, II, and III using a special function f (x) called a distribution function for distributed encryption of ticket transfer information. The dispersion function f (x) in this embodiment is assumed to be expressed by the following equation (7) with a1 = 7, a2 = 1, and a3 = 5 using the above equation (4).

f (x) = S0 + S1 (x-7) + R (x-1) (x-5) (mod P) (7)
In this equation (7), x is an information number for distributedly encrypting electronic data to generate distributed data Wx, S0 and S1 are division information obtained by dividing the ticket transfer information, and R is division information S0 from the distributed data Wx. A random character string (r in the previous equation (4)) for preventing S1 from being estimated, and P represents a fixed character string for the remainder calculation. The dispersion function f (x) of the equation (7) is obtained by substituting f (2) calculated by substituting 2 for x with W2, f (3) calculated by substituting 3 for x with W3, and 4 with x. When f (4) calculated by substitution is W4, W0 can be restored from W3 and W4 to S0, W2 and W4 to S1, W2 and W3 to W4, or any three Wx. It is a dispersion function such that Further, since the original pieces of divided information S0 and S1 are not known from the individual distributed data Wx including W2, W3 and W4, the divided information S0 and S1 can be safely distributed. Such a special distribution function f (x) can be obtained by the restoration control-type secret information distribution method described in Japanese Patent Application No. 2003-366538, and is not limited to Expression (7).

  In this embodiment, since the division information S0 and S1 are 14 bytes in length, a 14-byte hexadecimal character string P = FFFFFFFFFFFFFFFFFFFFFFFFFFB5 is used as the fixed character string P. In this embodiment, P is described as a fixed character string, but the actual P used in the calculation is treated as numerical information. In the case of numerical information, the fixed character string P is preferably a prime number. The size and value of the fixed character string P are not particularly defined in the present embodiment. It may be arbitrarily determined from the viewpoint of the assumed length of electronic data to be distributed and encrypted and the security strength against brute force attacks.

  Note that the distribution function f (x) and the fixed character string P are used not only in the client device 10 but also in the client device 20 and the server device 30. The means for sharing these pieces of information between the devices is not defined by the present invention. For example, these pieces of information may be always built into the fixed memory in each device as fixed information. A means of commonly using a recording medium such as an IC card storing these pieces of information can be considered.

  The distribution information generation means 13 first determines a random character string R in the dispersion function f (x) of the above equation (7) at random. The random character string R is a 14-byte hexadecimal character string and needs to be smaller than the fixed character string P. In this embodiment, it is assumed that R = 1A2B3C4D5E6F708192A3B4C5D6E7 is obtained as a random character string.

  Next, the distribution information generating means 13 distributes the distribution information I by substituting f = 2 for x = 2 into the distribution function f (x) of the above equation (7), and the distribution information I by substituting f = 4 for x = 4. F (6) into which II and x = 6 are substituted is calculated as distribution information III and stored in an internal memory or the like. In the present embodiment, S0 = 656E646F202067753387368653300, S1 = 543030303030330313032353030, R = 1A2B3C4D5E6F708192A3B4C5D6E7, and P = FFFFFFFFFFFFFFFFFFFFFFFFFFB5, each distribution information is calculated as follows.

I = f (2) = S0-5S1-3R = 71FBBE9613E124FF8A974F09BCC5 (mod P)
II = f (4) = S0-3S1-3R = 1A5C1EF6744185555FECF7B3741D70 (mod P)
III = f (6) = S0-S1 + 5R = 941661c1c81D69CCE475BE0D3533 (mod P)
From the calculated distribution information, division information S1 from distribution information I and II, S0, S1 from all distribution information I, II, and III, and random character string R are distributed according to the characteristics of the dispersion function f (x) described above. It can be restored. FIG. 13 shows a calculation example of the distribution information generation process.

  10 and 11, the transfer source user calculates the distribution information III and submits it to the ticket service provider (server device 30) each time the ticket is transferred, but the transfer source user registers with the ticket service provider as a user. In the present invention, it is possible to set the distribution information III and always use the same distribution information III. In this case, the transfer source user may generate the distribution information III at the time of user registration, or the ticket service provider may generate the distribution information III and distribute it to the transfer source user. Note that the present invention does not particularly define a method for generating the distribution information III in this case. The distribution information III may be an arbitrary value as long as it is smaller than the fixed character string P. For example, the ticket service provider can disclose the authentication information such as the user ID and password of the transfer source user from the distribution information III. You may make it calculate the remainder by the fixed character string P, after encrypting with a key.

  Hereinafter, generation of distribution information in the distribution information generation unit 13 when the distribution information III is a fixed value will be described.

  The distribution information generation means 13 uniquely determines a random character string R used in the distribution function formula f (x) based on the distribution information III and the distribution function f (x). In the case of Expression (7), the distribution information III is f (6) obtained by substituting x = 6 into the dispersion function expression f (x). Therefore, f (6) = S0−S1 + 5R = III is R , The random character string R can be determined from the following equation (8).

本実施例においては、分配情報IIIを「９４１６６１ＣＩＣ８１Ｄ６９ＣＣＥ４７５ＢＥ０Ｄ３５５３」と与えると、上記の式（８）にＳ０＝６５６Ｅ６４６Ｆ２０２０６７７５３８７３６８６５３３００、Ｓ１＝５４３０３０３０３０３０３０３０３１３０３２３５３０３０を代入して算出する事で、Ｒ＝１Ａ２Ｂ３Ｃ４Ｄ５Ｅ６Ｆ７０８１９２Ａ３Ｂ４Ｃ５Ｄ６Ｅ７が得られる。

In this embodiment, when the distribution information III is given as “941661CIC81D69CCE475BE0D3553”, R = 1A2B3C4D5E6F7C6D5E6F7C4D6E6F7C6D5E6F7F6C6D5E6F is obtained by substituting S0 = 656E646F20206773538368653300 and S1 = 54303030303030332353030 into the above equation (8).

  The distribution information generation means 13 calculates distribution information I and II using the calculated R, and obtains I = 71FBBE9613E124FF8A974F09BCC5, II = 1A5CIEF6744185555FECF7B3741D70. In this way, the present invention can calculate the random number character string R and then calculate the distribution information I and II after setting the distribution information III to a predetermined value.

<Distributed information restoration processing>
Next, the distribution information restoration processing in step S24 in the ticket transfer sequence of FIGS. 10 and 11 will be described in detail.
The client device 20 first receives the ticket image and distribution information I and II in the user information input means 21 and stores them in an internal memory or the like. In this embodiment, it is assumed that the transfer target ticket image output and transmitted in the client device 10 and distribution information I = 71FBBE9613E124FF8A974F09BCC5, II = 1A5CIEF6744185555FECF7B3741D70 are input.

  Note that this embodiment does not particularly define the input target, method, and format of the user information input means 21. It is only necessary to input the ticket image and the distribution information I and II at the minimum, and it is also possible to accept the input of ticket information such as the ticket ID of the ticket to be transferred. In addition to user keyboard input, file name input and drag-and-drop input on the screen, reading from an external recording medium such as an IC card, ticket information including ticket images directly transmitted from the client device 10, and The distribution information I and II may be received via the communication means 24.

  The ticket display unit 22 displays the input ticket image as information related to the ticket to be transferred. The present embodiment does not particularly define the contents displayed on the ticket display means 22. The transfer destination user only needs to be able to confirm the minimum information regarding the ticket to be transferred, and when ticket information such as a ticket ID is input, this is displayed or the server of the ticket service provider via the communication means 24. The ticket information corresponding to the ticket ID may be acquired and displayed by communicating with the device 30.

  The distribution information restoring means 23 restores the division information S1 in the ticket transfer information from the input distribution information I and II according to a predetermined calculation process. Since the distribution information I and II in this embodiment is f (2) obtained by substituting x = 2 into the dispersion function f (x) of the equation (7) and f (4) obtained by substituting x = 4. A simultaneous equation such as the following equation (9) can be established.

したがって、分配情報ＩとIIから分割情報Ｓ１を求める式は以下のようになる。ただし、分割情報Ｓ１と乱数文字列Ｒはこの方程式からは得る事ができない。

Therefore, the equation for obtaining the division information S1 from the distribution information I and II is as follows. However, the division information S1 and the random number character string R cannot be obtained from this equation.

本実施例においては、分配情報Ｉ、IIがそれぞれ、Ｉ＝７１ＦＢＢＥ９６１３Ｅ１２４ＦＦ８Ａ９７４Ｆ０９ＢＣＣ５、II＝１Ａ５ＣＩＥＦ６７４４１８５５ＦＥＣＦ７Ｂ３７４１Ｄ７０である事から、上記の式（１０）によりＳ１を算出すると、Ｓ１＝５４３０３０３０３０３０３０３０３１３０３２３５３０３０を得る。図１４に分配情報復元処理の計算例を示す。

In this embodiment, since the distribution information I and II are I = 71FBBE9613E124FF8A974F09BCC5 and II = 1A5CIEF67441855FECF7B3741D70, when S1 is calculated by the above equation (10), S1 = 5430303030330313032353030 is obtained. FIG. 14 shows a calculation example of the distribution information restoration process.

  When the calculated S1 is divided into a 9-byte ticket ID and a 5-byte transfer amount according to a predetermined configuration, and reverse encoding is performed, “T0000000l” as the ticket ID to be transferred and “2500” as the transfer amount are obtained. . By displaying the restored ticket ID and transfer amount on the ticket display IF 22, the transfer destination user can confirm the ticket ID and transfer amount as a result of negotiation with the transfer source user. However, the user ID and password of the transfer source user cannot be confirmed. The client device 20 may acquire detailed information related to the ticket to be transferred by transmitting the ticket ID to the ticket service provider.

  When the transfer destination user confirms the ticket ID and transfer amount, the client device 20 transfers the ticket image and distribution information I and II to be transferred to the server device 30 of the ticket service provider via the communication means 24, and the transfer. Submit the user ID and password of the previous user and request an update of the ticket information.

  The present invention does not particularly define the method and format for inputting the user ID and password of the transfer source user submitted from the communication means 24. The user information input IF 21 may accept the input of the transfer source user, or the user ID and password recorded in advance on the client device 20 or on an external recording medium such as an IC card may be input as a file. .

  Further, the present embodiment does not particularly define the communication method and contents in the communication means 24. The server device 30 only needs to submit the ticket image, the distribution information I and II, and information as a means for authenticating the transferee user, and use other communication means such as mail instead of direct communication through the network line. Alternatively, it may be submitted by physical means using an external recording medium such as an IC card. Also, when submitting via a network line, it is desirable to increase the security of the submission via the network line by, for example, encrypting and submitting using the public key of the ticket service provider.

  Next, the distribution information restoration processing in step S28 in the ticket transfer sequence of FIGS. 10 and 11 will be described in detail. The server device 30 first receives input of distribution information III transmitted from the client device 10 of the transfer source user and authentication information including, for example, the user ID and password of the transfer source user via the communication unit 3a. In this embodiment, it is assumed that “941661CIC81D69CCE475BE0D3553” is input as the distribution information III, “end0” is input as the user ID, and “gu8che3” is input as the password. When the user information management unit 31 authenticates the transfer source user, the distribution information III is stored in the internal memory or the user information DB 3b in association with the user ID of the user. If authentication of the transfer source user is not established, processing such as returning an error message to the client device 10 may be performed.

  Next, the server device 30 inputs the authentication information including the ticket image and distribution information I and II transmitted from the client device 20 of the transfer destination user and the user ID and password of the transfer destination user via the communication unit 3a. Accept and store in internal memory. In this embodiment, it is assumed that “71FBBE9613E124FF8A974F09BCC5”, “1A5CIEF67441855FECF7B3741D70”, “hirota” as the user ID, and “kh3his9” as the password are input as the distribution information I and II.

  Next, the watermark reading means 36 reads the watermark information embedded in the ticket image from the input ticket image and stores it in the internal memory or the like. In this embodiment, it is assumed that “endo” that is the user ID of the transfer destination user and “T0000000l” that is the ticket ID of the ticket image are read from the ticket image to be transferred.

  The user information management means 31 acquires the distribution information III stored in the internal memory or the user information DB 3b (FIG. 4) based on the user ID.

  The distribution information restoring means 37 completely restores the division information S0, S1 of ticket information, that is, ticket transfer information according to a predetermined calculation process from the input distribution information I, II and distribution information III, and the ticket ID, transfer amount and transfer Get the user ID and password of the original user. The distribution information I, II, and III in the present embodiment includes f (2) obtained by substituting x = 2 into the dispersion function f (x) of Expression (7), f (4) obtained by substituting x = 4, and x = Since f (6) is a value obtained by substituting 6, simultaneous equations such as the following equation (11) can be established.

この連立方程式を行列式で表わすと次のようになる。

This simultaneous equation is expressed as a determinant as follows.

上記行列式を掃き出し法などにより解く事で、分割情報Ｓ０、Ｓ１と乱数文字列Ｒを得る事ができる。本実施例においては、分配情報Ｉ、II、IIIがそれぞれ、Ｉ＝７１ＦＢＢＥ９６１３Ｅ１２４ＦＦ８Ａ９７４Ｆ０９ＢＣＣ５、II＝１Ａ５ＣＩＥＦ６７４４１８５５ＦＥＣＦ７Ｂ３７４１Ｄ７０、III＝９４１６６１ＣＩＣ８１Ｄ６９ＣＣＥ４７５ＢＥ０Ｄ３５５３である事から、上記式（１２）の行列式を解いてＳ０、Ｓ１、Ｒを算出すると、Ｓ０＝６５６Ｅ６４６Ｆ２０２０６７７５３８７３６８６５３３００、Ｓ１＝５４３０３０３０３０３０３０３０３１３０３２３５３０３０、Ｒ＝１Ａ２Ｂ３Ｃ４Ｄ５Ｅ６Ｆ７０８１９２Ａ３Ｂ４Ｃ５Ｄ６Ｅ７が得られる。図１５に分配情報復元処理の計算例を示す。

The division information S0 and S1 and the random character string R can be obtained by solving the determinant by a sweeping method or the like. In this embodiment, since the distribution information I, II, and III are I = 71FBBE9613E124FF8A974F09BCC5, II = 1A5CIEF67441855FECF7B3741D70, III = 941661, CIC81D69CCE475BE0D3553 Then, S0 = 656E646F20206775387368865300, S1 = 54303030303030313032353030, and R = 1A2B3C4D5E6F708192A3B4C5D6E7 are obtained. FIG. 15 shows a calculation example of the distribution information restoration process.

  When the calculated S0 is divided into a 6-byte user ID and an 8-byte password according to a predetermined configuration and subjected to reverse encoding, “endo” as the user ID of the transfer source user and “gu8sh3” as the password are obtained. Similarly, when S1 is divided into a 9-byte ticket ID and a 5-byte transfer amount according to a predetermined configuration, and reverse encoding is performed, “T0000000l” as the ticket ID to be transferred and “2500” as the transfer amount are obtained. .

<Program, recording medium>
The processing functions of some or all of the devices in the system shown in FIGS. 2 and 3 can be configured by a computer program, and the program can be executed using the computer to implement the present invention. Needless to say, the processing procedures shown in FIGS. 8 to 11 can be configured by a computer program, and the computer can execute the program. In addition, a computer-readable recording medium such as an FD, MO, ROM, memory card, CD, or the like is stored in the computer. In addition, the program can be recorded and stored on a DVD, a removable disk, etc., and the program can be distributed through a network such as the Internet.

It is the figure which showed the business model implement | achieved by this invention. It is the figure which showed the system whole structure of the electronic ticket sales and transfer system of Example 1 of this invention. It is the figure which showed the system whole structure of the electronic ticket sale and transfer system of Example 2 of this invention. It is the figure which showed the data structure example of user information DB. It is the figure which showed the example of a data structure of ticket sales information DB. It is the figure which showed the data structure example of ticket information DB. It is the figure which showed the data structure example of transfer information DB. It is the figure which showed the electronic ticket issue sequence of Example 1 and Example 2. FIG. It is the figure which showed the electronic ticket transfer sequence of Example 1. FIG. It is the figure which showed the electronic ticket transfer sequence of Example 2. FIG. It is the figure which showed another electronic ticket transfer sequence of Example 2. FIG. It is the figure which showed the data structure example of ticket transfer information. It is the figure which showed the example of a distribution information generation process in the transfer origin user. It is a figure showing an example of distribution information restoration processing in a transfer destination user. It is the figure which showed the example of distribution information restoration processing in a ticket service provider.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Client apparatus 11 User information input means 12 Ticket display means 13 Communication means 20 Client apparatus 21 User information input means 22 Ticket display means 23 Communication means 30 Server apparatus 31 User information management means 32 Ticket sales information management means 33 Ticket information management means 34 Watermark embedding means 35 Electronic ticket issuing means 36 Watermark reading means 37 Communication means 38 User information DB
39 Ticket Sales Information DB
3a Ticket information DB
DESCRIPTION OF SYMBOLS 10 Client apparatus 11 User information input means 12 Ticket display means 13 Distribution information generation means 14 Communication means 20 Client apparatus 21 User information input means 22 Ticket display means 23 Distribution information restoration means 24 Communication means 30 Server apparatus 31 User information management means 32 Ticket Sales information management means 33 Ticket information management means 34 Watermark embedding means 35 Electronic ticket issuing means 36 Watermark reading means 37 Distribution information restoring means 38 Transfer information management means 39 Payment means 3a Communication means 3b User information DB
3c Ticket sales information DB
3d ticket information DB
3e Transfer information DB

Claims (13)

An electronic device in which a client device and a server device are connected to a network, the server device issues an electronic ticket in response to an electronic ticket purchase request issued from the client device, and provides an electronic ticket to the client device A ticket sales method,
The server device
Obtaining an event ID for uniquely identifying an electronic ticket event to be purchased and user information of a ticket purchaser necessary for purchasing the electronic ticket from the client device;
Issuing a ticket ID for uniquely identifying a purchased electronic ticket;
Storing the event ID and the user information of the ticket purchaser in the ticket information database in association with the ticket ID;
Issuing electronic ticket data including image data in which the user information of the ticket purchaser and the ticket ID are embedded as a digital watermark;
Transmitting the electronic ticket data to the client device;
An electronic ticket selling method characterized by comprising: A plurality of client devices and a server device are connected to a network, and the server device performs an electronic ticket issue process in response to an electronic ticket purchase request issued from a first client device of a first user who is a ticket purchaser. When the electronic ticket is transferred from the first user who is the ticket purchaser to the second user different from the first user, in response to the electronic ticket transfer change request issued from the client device of the second user An electronic ticket sales / transfer method for performing electronic ticket transfer processing and providing an electronic ticket to a user,
The server
A process of obtaining an event ID for uniquely identifying an electronic ticket event to be purchased from the first client device of the first user who is the ticket purchaser, and user information of the ticket purchaser necessary for purchasing the electronic ticket When,
Issuing a ticket ID for uniquely identifying a purchased electronic ticket;
Storing the event ID and the user information of the ticket purchaser in the ticket information database in association with the ticket ID;
Issuing electronic ticket data including image data in which the user information of the ticket purchaser and the ticket ID are embedded as a digital watermark;
Transmitting the electronic ticket data to the first client device;
An electronic ticket sales / transfer method comprising: An electronic ticket sales / transfer method according to claim 2,
The server device
The transfer target electronic sent from the second client device of the second user who is the ticket transfer destination to the second client device from the first client device of the first user who is the ticket purchaser Obtaining ticket data and user information of the second user necessary for electronic ticket transfer processing;
A process of reading out a ticket ID embedded as a digital watermark and user information of the ticket purchaser from image data included in the electronic ticket data;
When the pair of the read ticket ID and the user information exists in the ticket information database, the user information of the ticket purchaser associated with the corresponding ticket ID is updated to the user information of the second user. Process,
Issuing new electronic ticket data including image data in which the user information of the second user and the ticket ID are embedded as a digital watermark;
Sending the new electronic ticket data to the second client device;
An electronic ticket sales / transfer method comprising: An electronic ticket sales / transfer method according to claim 2,
When the first client device transfers the electronic ticket from the first user who is the ticket purchaser to the second user, the user information of the first user and the electronic ticket to be transferred First and second distribution information capable of restoring only the transfer amount information of the electronic ticket using the secret sharing method, ticket transfer information encoded by combining the ticket ID and the transfer amount of the ticket, By performing decryption processing together with the first and second distribution information, the process of dividing the ticket transfer information into third distribution information that can be restored, and the third distribution information , As a ticket transfer application, a process of transmitting to the server device, electronic ticket data to be transferred, and the first and second distribution information, the second client device or the second And a process of transmitting to a storage device accessible from the client apparatus,
The second client device arranges the first and second distribution information, and the first client device or the first client device arranges the electronic ticket and the first and second distribution information. A process of obtaining from the storage device, a process of restoring and confirming the ticket ID and transfer amount of the electronic ticket from the obtained first and second distribution information, the electronic ticket data, and the electronic ticket A step of transmitting the user information of the second user necessary for the transfer processing of the first and second distribution information to the server device,
The server device obtains the third distribution information from the first client device, and electronic ticket data to be transferred transmitted from the first client device to the second client device; Obtaining the user information of the second user necessary for the electronic ticket transfer process and the first and second distribution information from the second client device, and from the second client device. A process of reading a ticket ID and user information of a ticket purchaser embedded as a digital watermark from image data included in the obtained electronic ticket data; and third distribution information obtained from the first client device; The process of restoring all of the ticket transfer information from the first and second distribution information obtained from the second client device The pair of the ticket ID read from the digital watermark and the user information of the ticket purchaser matches the pair of the ticket ID included in the ticket transfer information restored from the distribution information and the user information of the ticket purchaser, and If the information exists in the ticket information database, the user information of the ticket purchaser associated with the corresponding ticket ID is updated to the user information of the second user, and the user of the second user A step of issuing new electronic ticket data including image data in which information and the ticket ID are embedded as a digital watermark, a step of transmitting the new electronic ticket data to the second client device, The ticket is transferred from the second user according to the ticket transfer amount included in the restored ticket transfer information. A step of collecting a transfer fee, the relative first user, the electronic ticket vending and transfer method characterized by having a process of performing the reduction of the ticket transfer rate. In the electronic ticket sales / transfer method according to claim 3 or 4,
An electronic ticket sales / transfer method, wherein a service provider operating the server device collects an update fee for ticket information from the second user. A server device that is connected to a client device over a network, performs electronic ticket issue processing in response to an electronic ticket purchase request issued from the client device, and provides an electronic ticket to the client device,
Means for obtaining, from the client device, an event ID that uniquely identifies an event of the electronic ticket to be purchased, and user information of the ticket purchaser necessary for purchasing the electronic ticket;
Means for issuing a ticket ID for uniquely identifying a purchased electronic ticket;
Means for storing the event ID and the user information of the ticket purchaser in the ticket information database in association with the ticket ID;
Means for issuing electronic ticket data including image data in which the user information of the ticket purchaser and the ticket ID are embedded as a digital watermark;
Means for transmitting the electronic ticket data to the client device;
A server device characterized by comprising. An electronic ticket issuance process is performed in response to an electronic ticket purchase request issued from a first client device of a first user who is a ticket purchaser connected to a plurality of client devices, and the ticket purchaser When transferring an electronic ticket from one user to a different second user, an electronic ticket transfer process is performed in response to an electronic ticket transfer change request issued from the client device of the second user, and the user A server device that provides electronic tickets to
Means for obtaining, from the first client device, an event ID for uniquely identifying an event of the electronic ticket to be purchased and user information of the ticket purchaser necessary for purchasing the electronic ticket;
Means for issuing a ticket ID for uniquely identifying a purchased electronic ticket;
Means for storing the event ID and the user information of the ticket purchaser in the ticket information database in association with the ticket ID;
Means for issuing electronic ticket data including image data in which the user information of the ticket purchaser and the ticket ID are embedded as a digital watermark;
Means for transmitting the electronic ticket data to the first client device;
A server device comprising: The server device according to claim 7,
Electronic ticket data that is a transfer target transmitted from the first client device of the first user to the second client device, and user information of the second user that is necessary for the transfer process of the electronic ticket, Means for obtaining from the second client device;
Means for reading out user information of the ticket purchaser embedded as a digital watermark from the image data included in the electronic ticket data;
When the pair of the read ticket ID and the user information exists in the ticket information database, the user information of the ticket purchaser associated with the corresponding ticket ID is updated to the user information of the second user. Means,
Means for issuing new electronic ticket data including image data in which the user information of the second user and the ticket ID are embedded as a digital watermark;
A server device comprising: means for transmitting the new electronic ticket data to the second client device. The server device according to claim 7,
When transferring an electronic ticket from the first user who is the ticket purchaser to the second user, the user information of the first user, the ticket ID of the electronic ticket to be transferred, and the transfer of the ticket The ticket transfer information encoded together with the amount is divided using a secret sharing method or the like, and the first and second distribution information capable of restoring only the ticket ID and the transfer amount, and the first and second The third distribution information is obtained from the first client device out of the third distribution information that makes it possible to restore all of the ticket transfer information by performing decryption processing together with the second distribution information. Means to
Electronic ticket data to be transferred, transmitted from the first client device to the second client device, user information of the second user necessary for the electronic ticket transfer process, the first and second Means for obtaining the distribution information from the second client device;
Means for reading out a ticket ID and user information of a ticket purchaser embedded as a digital watermark from image data included in the electronic ticket data obtained from the second client device;
Means for restoring all of the ticket transfer information from the third distribution information obtained from the first client device and the first and second distribution information obtained from the second client device;
The pair of the ticket ID read from the digital watermark and the user information of the ticket purchaser matches the pair of the ticket ID included in the ticket transfer information restored from the distribution information and the user information of the ticket purchaser, and Means for updating the user information of the ticket purchaser associated with the corresponding ticket ID to the user information of the second user if the information is present in the ticket information database;
Means for issuing new electronic ticket data including image data in which the user information of the second user and the ticket ID are embedded as a digital watermark;
Means for transmitting the new electronic ticket data to the second client device;
Means for collecting a ticket transfer fee from the second user in accordance with the transfer amount of the ticket included in the restored ticket transfer information;
Means for returning the ticket transfer price to the first user;
A server device comprising: Providing an electronic ticket by issuing an electronic ticket purchaser request to the server device by a client device connected to the server device and another second client device and used by the first user who is a ticket purchaser And a client device that issues an electronic ticket transfer application to the server device when transferring an electronic ticket from the first user who is the ticket purchaser to a second user different from the first user. ,
Using the secret sharing method, the transfer of the electronic ticket is performed using the secret transfer method, which is obtained by encoding the user information of the first user, the ticket ID of the electronic ticket to be transferred, and the transfer amount of the ticket. By performing decryption processing together with the first and second distribution information capable of restoring only the money amount information and the first and second distribution information, a third that makes it possible to restore all of the ticket transfer information Means for dividing the distribution information into three parts;
Means for transmitting the third distribution information to the server device as a ticket transfer application;
Means for transmitting electronic ticket data to be transferred and the first and second distribution information to a second client device of the second user or a storage device accessible from the second client device; ,
In the server device, after completion of the update process of the user of the electronic ticket, means for receiving the transfer amount of the electronic ticket;
A client device comprising: The server device is connected to the first client device other than the first user who is the ticket purchaser, and is used for the second user to whom the electronic ticket is transferred from the first user who is the ticket purchaser. When a client device transfers an electronic ticket from the first user, the client device issues an electronic ticket transfer update request to the server device,
A secret sharing method, wherein the first client device generates ticket transfer information encoded by combining the user information of the first user, the ticket ID of the electronic ticket to be transferred, and the transfer amount of the ticket. The ticket transfer is performed by performing decryption processing together with the first and second distribution information and the first and second distribution information that can be restored only by the ticket ID and the transfer amount. Of the third distribution information that makes it possible to restore all of the information, the first client device or the first client device receives the first and second distribution information from the electronic ticket and the first distribution information. Means for obtaining the second distribution information from the storage device,
Means for restoring and confirming the ticket ID of the electronic ticket and the transfer amount from the obtained first and second distribution information;
Means for transmitting the electronic ticket data, user information of the second user necessary for electronic ticket transfer processing, and the first and second distribution information to the server device as the electronic ticket transfer update request When,
Means for receiving from the server device, as electronic ticket data after transfer, image data in which the user information of the second user and the ticket ID are embedded as a digital watermark;
In the server device, after the update processing of the user of the electronic ticket is completed, a means for paying the transfer amount of the electronic ticket;
A client device comprising:   A program for causing a computer to execute the electronic ticket sales method or the electronic ticket sales / transfer method according to any one of claims 1 to 5.   A computer-readable recording medium storing a program for causing a computer to execute the electronic ticket sales method or the electronic ticket sales / transfer method according to any one of claims 1 to 5.

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