JP2013025558A - Variable printing system, variable printing request device, variable printing control device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guarantee that only a part of printed matters having the same content is output in variable printing.SOLUTION: A client device 10 is configured to notify a printer 50 of the number of data of a variable data group including a plurality of variable data to be successively embedded in a fixed model so as to be printed. The printer 50 is configured to acquire a set of encryption keys and decryption keys of the number of data of which the printer 50 has been notified, transmit the encryption keys of the number of data to the client device 10, and manage the decryption keys. The client device 10 is configured to receive the encryption keys, and transmit an encrypted variable data group including encrypted variable data encrypted by associating one of the received encryption keys with every variable data included in the variable data group to the printer 50. The printer 50 is configured to complete printing based on print data generated by embedding the variable data obtained by decrypting every encrypted variable data included in the encrypted variable data group by the corresponding decryption key in a fixed model, and then delete the decryption key corresponding to the encrypted variable data.

Description

  The present invention relates to a variable printing system, a variable printing request apparatus, a variable printing control apparatus, and a program.

  For printed materials such as invoices and direct mails, the template data common to the printed materials is divided into variable data (variable data) that differs for each printed material, and printing is performed while sequentially replacing the variable data for the template data. (Variable printing) (see, for example, Patent Document 1 below).

  When an error occurs during variable printing and printing is interrupted, if the printing is restarted from the beginning, a plurality of the same printed matter may be output, and there is a risk of information leakage.

JP 2005-031889 A

  One of the objects of the present invention is to provide a variable printing system, a variable printing requesting device, a variable printing control device, and a program capable of guaranteeing that only a part of a printed matter having the same contents is output in variable printing.

  In order to achieve the above object, the invention of the variable printing system according to claim 1 includes a variable printing requesting device and a variable printing control device, and the variable printing requesting device sequentially applies a predetermined printing format. Notification means for notifying the variable print control apparatus of the number of data of a variable data group including a plurality of variable data to be embedded and printed, the variable print control apparatus including an encryption key of the number of data notified by the notification means; An encryption key transmitting unit that acquires a set of decryption keys and transmits an encryption key of the number of data to the variable print requesting device; and a management unit that manages the decryption key, and the variable printing requesting device further includes: An encryption key receiving means for receiving the encryption key transmitted by the encryption key transmitting means, and one of the encryption keys received by the encryption key receiving means for each variable data included in the variable data group. And a transmission means for transmitting the encrypted variable data group including the encrypted variable data respectively encrypted to the variable print control apparatus, wherein the variable print control apparatus further includes the cipher transmitted by the transmission means. Receiving means for receiving the encrypted variable data group, and for each encrypted variable data included in the encrypted variable data group, the variable data obtained by decrypting the encrypted variable data with a corresponding decryption key is the predetermined printing format. Generating means for embedding in print data, and deleting means for deleting the decryption key corresponding to the encrypted variable data from the management means after printing based on the print data generated by the generating means is completed. It is characterized by including.

  According to a second aspect of the present invention, in the variable printing system according to the first aspect, the generation unit is one of the decryption keys managed by the management unit each time the decryption key is deleted by the deletion unit. And the variable data obtained by decrypting the encrypted variable data included in the encrypted variable data group corresponding to the newly selected decryption key with the newly selected decryption key is the predetermined print format. The print data is generated by embedding the print data.

  According to a third aspect of the present invention, in the variable printing system according to the first or second aspect, after the printing based on the print data generated by the generation unit is interrupted, the acquisition key is acquired from the management unit Means for generating variable data obtained by decrypting encrypted variable data included in the encrypted variable data group corresponding to the decryption key obtained by the obtaining means with the decryption key. The print data is generated by embedding in a form.

  According to a fourth aspect of the present invention, in the variable printing system according to any one of the first to third aspects, the deleting unit is configured to print the print data after printing based on the print data generated by the generating unit is completed. And at least one of the variable data used to generate the print data.

  The invention of the variable print requesting device according to claim 5 is a notification means for notifying the variable print control device of the number of data of a variable data group including a plurality of variable data to be printed by being sequentially embedded in a predetermined print format; An encryption key receiving unit that receives an encryption key of the number of data notified by the notification unit from the variable printing control device, and an encryption key received by the encryption key receiving unit for each variable data included in the variable data group A variable print requesting device including: transmission means for transmitting to the variable printing control device an encrypted variable data group that includes encrypted variable data that is encrypted in association with each other. Print data in which variable data obtained by decrypting the encrypted variable data with a corresponding decryption key is embedded in the predetermined print format for each encrypted variable data included in the group Is generated, the decryption key corresponding to the encryption variable data after the printing based on the print data the generated is completed, characterized in that it is deleted.

  According to a sixth aspect of the present invention, there is provided a program for notifying a variable print control apparatus of the number of data in a variable data group including a plurality of variable data to be printed by sequentially embedding in a predetermined print format, and the variable printing. One of the encryption key receiving means for receiving the encryption key of the number of data notified by the notification means from the control device, and one of the encryption keys received by the encryption key receiving means for each variable data included in the variable data group. Is a program for causing a computer to function as a transmission unit that transmits encrypted variable data groups including encrypted variable data associated with each other to the variable printing control apparatus, and is included in the encrypted variable data group For each encrypted variable data, the variable data obtained by decrypting the encrypted variable data with the corresponding decryption key is embedded in the predetermined print format. It is the print data is generated, a program, wherein a decryption key corresponding to the encryption variable data is deleted after the printing based on the print data the generated is completed.

  The invention of the variable print control device according to claim 7 acquires a set of encryption keys and decryption keys of the number of data of a variable data group including a plurality of variable data to be printed by being sequentially embedded in a predetermined print format, The encryption key transmitting unit that transmits the encryption key of the number of data to the variable print requesting device, the managing unit that manages the decryption key, and the variable key included in the variable data group are transmitted by the encryption key transmitting unit. Receiving means for receiving from the variable print requesting device an encrypted variable data group including encrypted variable data that is encrypted in association with one of the encryption keys; and the encrypted variable data included in the encrypted variable data group And generating means for generating print data by embedding variable data obtained by decrypting the encrypted variable data with a corresponding decryption key in the predetermined print format, and A decryption key corresponding to the encrypted variable data after the printing based on the print data has been made has been completed, characterized in that it comprises a deletion means for deleting from the management unit.

  The invention of the program according to claim 8 obtains a set of an encryption key and a decryption key of the number of data of a variable data group including a plurality of variable data to be printed by being sequentially embedded in a predetermined print format, and the number of the data Encryption key transmitting means for transmitting the encryption key to the variable print requesting apparatus, management means for managing the decryption key, and for each variable data included in the variable data group, the encryption key transmitted by the encryption key transmitting means. Receiving means for receiving from the variable print requesting device an encrypted variable data group including encrypted variable data that is encrypted in association with each other, and for each encrypted variable data included in the encrypted variable data group, Generation means for generating print data by embedding variable data obtained by decrypting the encrypted variable data with a corresponding decryption key in the predetermined print format, and generated by the generation means And a program for causing a computer to function as a deleting means printing based on the printing data to delete the decryption key corresponding to the encryption variable data after completing from the management unit.

  According to the first and fifth aspects of the present invention, it can be ensured that only a part of the printed matter having the same content is output in variable printing.

  According to the second aspect of the present invention, when variable printing is interrupted, a plurality of data during printing can be prevented from being present.

  According to the third aspect of the present invention, when the interrupted variable printing is resumed, it is possible to specify the data to be printed to be resumed from the information on the decryption key to be managed.

  According to the fourth aspect of the present invention, it is possible to delete information necessary for outputting a printed matter having the same content again from the variable printing control apparatus.

It is a figure which shows an example of the system block diagram of the variable printing system which concerns on this embodiment. It is a figure which shows an example of the functional block diagram of a client apparatus. 2 is a diagram illustrating an example of a functional block diagram of a printer. FIG. It is a figure which shows an example of a template. It is a figure which shows an example of a data structure of a variable data group. It is a figure which shows an example of an encryption key data table. It is a figure which shows the figure explaining the flow of the encryption process of a variable data group. It is a figure which shows an example of a decryption key data table. It is a sequence diagram of the process performed in a variable printing system. 3 is a flowchart of processing performed in a printer.

  Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  FIG. 1 shows an example of a system configuration diagram of a variable printing system 1 according to the present embodiment. As shown in FIG. 1, the variable printing system 1 includes a client device 10 and a printer 50, and the client device 10 and the printer 50 communicate data with each other via a network 5. In the present embodiment, an example will be described in which the variable print request device is applied to the client device 10 and the variable print control device is applied to the printer 50. Note that variable printing is a printing method in which printing is performed by sequentially replacing variable data (variable data) that differs for each printed material on a fixed template common to the printed material. Hereinafter, a set of variable data used for variable printing is referred to as a variable data group.

  The client apparatus 10 is a computer that provides a variable data group to be printed to the printer 50 and performs variable printing. Details of functions provided in the client device 10 will be described later.

  The printer 50 is an image forming apparatus that receives a variable data group provided from the client device 10 and executes variable printing based on the variable data group and designated template data. Details of functions provided in the printer 50 will be described later.

  Details of the functions provided in the client device 10 and the printer 50 will be described below with reference to the functional block diagrams shown in FIGS. 2A and 2B.

  FIG. 2A shows an example of a functional block diagram of the client device 10. 2A, the client device 10 includes a variable data group acquisition unit 12, a data number acquisition unit 14, an encryption key acquisition unit 16, a variable data group division unit 18, a variable data encryption unit 20, and an encrypted data generation unit. 22 and an encrypted data transmission unit 24.

  The functions of the above-described units included in the client device 10 are information storage media that can be read by a computer including a control unit such as a CPU, a storage unit such as a memory, and an input / output unit that transmits and receives data to and from an external device. It may be realized by reading and executing the program stored in the. The program may be supplied to the client device 10 that is a computer by an information storage medium such as an optical disk, a magnetic disk, a magnetic tape, a magneto-optical disk, or a flash memory, or may be supplied via a data communication network such as the Internet. It is also good to do.

  The variable data group acquisition unit 12 acquires a variable data group including a plurality of variable data to be printed. The variable data group acquisition unit 12 may read and acquire a variable data group stored in a storage unit such as a hard disk or a memory in the client device 10, or may acquire a variable data group from another device or an information storage medium. It is good to do.

  FIG. 3 shows an example of a template for printing by embedding each variable data included in the variable data group to be printed. The template shown in FIG. 3 includes a character string of each item of name, date of birth, card number, address, and telephone number, and an area in which data of each item is embedded.

  FIG. 4 shows an example of the data configuration of the variable data group to be printed. FIG. 4 shows an example in which the data of the variable data group is configured as a table (variable data table) including a plurality of records storing variable data. Each record includes a record number (record ID), a template Data of each item to be embedded in (name, date of birth, card number, address, telephone number data) is stored.

  The data number acquisition unit 14 acquires the number of data (number of records) included in the variable data group acquired by the variable data group acquisition unit 12. For example, the data number acquisition unit 14 may refer to the maximum record number in the variable data table to be printed and acquire the record number as the data number (record number).

  The encryption key acquisition unit 16 requests the printer 50 to issue encryption keys for the number of data acquired by the data number acquisition unit 14, and acquires encryption keys for the number of data issued by the printer 50 in response to the request. . In the present embodiment, the public key cryptosystem is used as the encryption scheme, and the printer 50 generates a set of public keys and secret keys for the number of data related to the issuance request from the client device 10, and the generated public key is It is transmitted to the client device 10. The generated secret key is held in the storage unit in the printer 50.

  FIG. 5 shows an example of the encryption key data table storing the encryption keys acquired by the encryption key acquisition unit 16. In the example of the encryption key data table shown in FIG. 5, a job ID, a record number, and an encryption key are stored in association with each other. The job ID is an identifier given by the printer 50 to the encryption key issuance request by the encryption key acquisition unit 16. In this embodiment, the record number of the encryption key data table matches the record number of the variable data, and the variable data is stored in the encryption key data table in association with the record number of the variable data. Encrypted. As long as the correspondence between the encryption key and the variable data is uniquely determined, the record number of the encryption key data table may not match the record number of the variable data.

  The variable data group dividing unit 18 divides the variable data group (variable data table) acquired by the variable data group acquiring unit 12 for each variable data (record). Each variable data (record) divided by the variable data group dividing unit is output to the variable data encryption unit 20.

  The variable data encryption unit 20 encrypts each variable data (record) divided by the variable data group division unit 18 using an encryption key corresponding to the variable data (record). Here, the encryption key corresponding to the variable data (record) may be obtained from the encryption key data table using the record number of the variable data as a key.

  The encrypted data generation unit 22 combines the variable data (encrypted records) encrypted by the variable data encryption unit 20 to generate encrypted variable data group data (encrypted data).

  Here, FIG. 6 shows a diagram for explaining the flow of the encryption processing of the variable data group (variable data table) to be printed. As shown in FIG. 6, each record (A) included in the variable data table is encrypted with the encryption key of the corresponding record number (B) and then combined again (C). Thus, an encrypted variable data table (encrypted variable data table) is generated.

  The encrypted data transmission unit 24 transmits the encrypted data (encrypted variable data table) generated by combining the variable data (encrypted records) encrypted by the encrypted data generation unit 22 to the printer 50. For example, the encrypted data transmission unit 24 may transmit the encrypted data including the job ID assigned by the printer 50 to the encryption key and the template ID for identifying the template for embedding the variable data. .

  Next, an example of functions provided in the printer 50 will be described. FIG. 2B shows an example of a functional block diagram of the printer 50. As shown in FIG. 2B, the printer 50 includes a key information generation unit 52, a decryption key management unit 54, an encryption key transmission unit 56, an encrypted data reception unit 58, an encrypted variable data group division unit 60, and encrypted variable data. A decoding unit 62, a template data acquisition unit 64, a print data generation unit 66, a print control unit 68, an error determination unit 70, and a data update unit 72 are provided.

  The function of each unit provided in the printer 50 is as follows: a computer having a control unit such as a CPU, a storage unit such as a memory, an input / output unit that transmits and receives data to and from an external device, and an image forming unit such as a print engine. It may be realized by reading and executing a program stored in a readable information storage medium. The program may be supplied to the printer 50 as a computer by an information storage medium such as an optical disk, a magnetic disk, a magnetic tape, a magneto-optical disk, or a flash memory, or may be supplied via a data communication network such as the Internet. It is good as well.

  When the key information generation unit 52 receives an encryption key issuance request for the number of pieces of variable data to be printed from the encryption key acquisition unit 16 of the client device 10, the key information generation unit 52 sets the encryption key and the decryption key for the number of data. Create a tuple. In the present embodiment, the public key cryptosystem is used as the cryptosystem, and the key information generation unit 52 generates a set of public keys and secret keys for the number of received data. Here, the key information generation unit 52 associates record numbers 1 to N (N is the number of data) of variable data corresponding to a set of a public key and a secret key. Then, the key information generation unit 52 generates a job ID for identifying the received encryption key issuance request, and outputs information on the combination of the job ID, the record number, and the secret key to the decryption key management unit 54.

  The decryption key management unit 54 manages the decryption key (secret key) generated by the key information generation unit 52. For example, the decryption key management unit 54 stores information on the combination of the job ID and record number input from the key information generation unit 52 and the secret key.

  FIG. 7 shows an example of a decryption key data table managed by the decryption key management unit 54. As shown in FIG. 7, the decryption key data table stores a job ID, a record number, and a decryption key (secret key) in association with each other. As described above, the record number of the decryption key data table shown in FIG. 7 is configured to correspond to the record number of variable data.

  The encryption key transmitting unit 56 transmits, to the client device 10, encryption keys for the number of variable data generated by the key information generating unit 52 in response to a request from the client device 10. For example, the encryption key transmission unit 56 generates an encryption key data table that stores information on a combination of a job ID, a record number, and a public key, and transmits the encryption key data table to the client device 10. An example of the encryption key data table is as shown in FIG.

  The encrypted data receiving unit 58 receives the encrypted data transmitted from the encrypted data transmitting unit 24 of the client device 10. In the present embodiment, the encrypted data includes an encrypted variable table including a job ID, a template ID for identifying a template, and encrypted variable data (record).

  The encrypted variable data group dividing unit 60 divides the encrypted variable table received by the encrypted data receiving unit 58 for each record (encrypted variable data). Each record divided by the encrypted variable data group dividing unit 60 is output to the encrypted variable data decrypting unit 62.

  The encrypted variable data decrypting unit 62 decrypts using the secret key corresponding to each record (encrypted variable data) divided by the encrypted variable data group dividing unit 60. In the present embodiment, a predetermined rule (for example, by referring to the decryption key management table managed by the decryption key management unit 54 in association with the job ID included in the encrypted data received by the encrypted data reception unit 58). Select the record number according to the order of the record number. Here, the encrypted variable data decryption unit 62 uses the selected record number as the target record number, and acquires the decryption key associated with the target record number from the decryption key management table. Next, the encrypted variable data decrypting unit 62 selects a record corresponding to the record number of interest among the records (encrypted variable data) divided by the encrypted variable data group dividing unit 60, and obtains the selected record as described above Decrypt using the decrypted key.

  The template data acquisition unit 64 acquires template data stored in association with the template ID included in the encrypted data received by the encrypted data reception unit 58. The template data may be stored in a storage unit inside the printer 50, or may be stored in a database outside the printer 50. In this embodiment, the client device 10 transmits the template ID for specifying the template data to the printer 50. However, the template data may be transmitted to the printer 50 instead of the template ID.

  The print data generation unit 66 generates print data based on the record (variable data) decrypted by the encrypted variable data decryption unit 62 and the template data. For example, the print data generation unit 66 may generate a raster image (RIP data) in a state where data included in the decrypted record is embedded in template data.

  The print control unit 68 causes the print engine to execute print processing based on the print data generated by the print data generation unit 66.

  The error determination unit 70 determines whether an error has occurred in the printing process executed by the print control unit 68. When the error that has occurred requires interruption of printing, the error determination unit 70 instructs the printing control unit 68 to suspend printing, suspends printing, and corresponds to the print data at the time of interruption and the print data. Save the private key and variable data.

  When resuming printing interrupted by an instruction from the error determination unit 70, the print control unit 68 executes print processing of the saved print data at the time of interruption, and after the print processing is completed, the secret key and print data After the variable data is deleted, the record number is selected according to a predetermined rule (for example, in ascending order of the record number) with reference to the decryption key management table managed by the decryption key management unit 54, and the selected record The printing process may be continued with the number as the processing target.

  The data update unit 72 manages the print data managed by the decryption key management unit 54 when the print process executed by the print control unit 68 is normally completed based on the print data generated by the print data generation unit 66. The decryption key associated with the target record number related to is deleted. The data update unit 72 may also delete the print data for which the print processing has been completed and the record decrypted with the decryption key associated with the record number of interest associated with the print data, together with the decryption key.

  After the data update unit 72 deletes the decryption key from the decryption key management table, the encrypted variable data decryption unit 62 follows the predetermined rule (for example, in ascending order of the record number) from the updated decryption key management table. The record number is selected again, and the same flow as above is repeatedly executed until there is no decryption key stored in the decryption key management table.

  Next, the flow of processing in the variable printing system 1 will be described with reference to the sequence diagram shown in FIG. 8 and the flowchart shown in FIG.

  As illustrated in FIG. 8, the client device 10 acquires a variable data group (variable data table) to be printed based on, for example, a print instruction received from a user (S101), and is included in the acquired variable data group. The number of data (data number: N) is specified (S102). Then, the client apparatus 10 transmits print request data including the number of data (N) specified in S102 to the printer 50 (S103).

  The printer 50 sets a set of public keys and secret keys for the number of data (N) transmitted in S103 (each set as a private key i corresponding to the public key i, i = 1,..., N). It generates (S104), stores the generated secret keys 1 to N (S105), and transmits the generated public keys 1 to N to the client device 10 (S106).

  The client device 10 selects one of the variable data included in the variable data group (variable data i, i = 1,..., N and the initial value of i is 1) (S107). The variable data i is encrypted using the public key i corresponding to the variable data i (S108). When i has not reached N (S109: N), the client apparatus 10 increments i (S110), returns to S107, and when i has reached N (S109: Y), the encryption is performed. An encrypted variable data group including the converted variable data 1 to N (hereinafter referred to as encrypted variable data 1 to N) is generated (S111). Then, the client device 10 transmits the encrypted data in which the template ID for designating the template is added to the generated encrypted variable data group to the printer 50 (S112).

  The processes after S112 will be described with reference to the flowchart shown in FIG. As shown in FIG. 9, the printer 50 acquires template data based on the template ID transmitted from the client device 10 in S112 (S113).

  Next, the printer 50 selects the secret key j having the smallest number among the stored secret keys i (i = j,..., N, j has an initial value of 1) (S114), and the encryption variable is selected. The encrypted variable data j included in the data group is decrypted using the secret key j (S115) to obtain the variable data j. The printer 50 generates print data j (RIP data) based on the variable data j obtained by decoding and the template data (S116), and starts a printing process using the generated print data j (S117). If the printer 50 determines that an error that requires interruption has occurred in the printing process (S118: Y), the printing is interrupted and the printing data is saved (S119), and printing is resumed (S120: N). When waiting and resuming printing (S120: Y), printing processing of the print data that was the processing target at the time of printing interruption is started (S121), and then the process proceeds to S122.

  If there is no error that requires interruption in the printing process (S118: N), the printer 50 determines whether printing based on the print data j has been completed (S122). Here, if printing is not completed (S122: N), the printer 50 returns to S118, and if printing is completed (S122: Y), the secret key j, print data j, variable data j. Is deleted (S123). If the private key i to be managed remains (S124: Y), the printer 50 returns to S114. If the private key i does not remain (S124: N), the printer 50 ends the process.

  In the variable printing system 1 described above, a unique encryption key / decryption key pair is assigned to each of a plurality of variable data, and the variable data encrypted on the client side is decrypted on the printer 50 side for printing processing. Since the decryption key used for decryption is deleted every time printing is completed, it is guaranteed that printing for one variable data is performed only once. In addition, when the print data and variable data used for printing are deleted together with the decryption key, information for reprinting does not remain on the printer 50 side, so the risk of information leakage is suppressed compared to the case where it is not. It is done.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the variable print control apparatus is applied to the printer 50. However, the variable print control apparatus is applied to the print server, and the print data generated by the print server is applied to the printer connected to the print server. You may make it perform printing by transmitting. Each record of the variable data table may correspond to one part of the printed material or may correspond to one page of the printed material. In the above-described embodiment, the printer 50 generates a set of public keys and secret keys for the number of data received from the client device 10. However, the printer 50 provides a public key to a management server that manages key information. And a secret key may be requested, and the public key and secret key generated by the management server may be acquired.

  DESCRIPTION OF SYMBOLS 1 Variable printing system, 5 network, 10 client apparatus, 12 Variable data group acquisition part, 14 Data number acquisition part, 16 Encryption key acquisition part, 18 Variable data group division part, 20 Variable data encryption part, 22 Encrypted data generation part , 24 Encrypted data transmission unit, 50 Printer, 52 Key information generation unit, 54 Decryption key management unit, 56 Encryption key transmission unit, 58 Encrypted data reception unit, 60 Encrypted variable data group segmentation unit, 62 Encrypted variable data Decoding unit, 64 template data acquisition unit, 66 print data generation unit, 68 print control unit, 70 error determination unit, 72 data update unit.

Claims (8)

A variable printing requesting device and a variable printing control device;
The variable print requesting device includes:
A notification means for notifying the variable print control device of the number of data of a variable data group including a plurality of variable data to be embedded and printed in a predetermined print format sequentially;
The variable printing control device includes:
An encryption key transmitting means for acquiring a set of encryption keys and decryption keys for the number of data notified by the notification means, and transmitting the encryption key for the number of data to the variable print requesting device;
Managing means for managing the decryption key,
The variable print requesting device further includes:
An encryption key receiving means for receiving the encryption key transmitted by the encryption key transmitting means;
For each variable data included in the variable data group, an encrypted variable data group including encrypted variable data in which one of the encryption keys received by the encryption key receiving unit is associated with each other and encrypted. Transmitting means for transmitting to
The variable printing control device further includes:
Receiving means for receiving the encrypted variable data group transmitted by the transmitting means;
Generation means for generating print data for each encrypted variable data included in the encrypted variable data group by embedding variable data obtained by decrypting the encrypted variable data with a corresponding decryption key in the predetermined print format; ,
A variable printing system, comprising: a deletion unit that deletes a decryption key corresponding to the encrypted variable data from the management unit after printing based on the print data generated by the generation unit is completed. Each time the generation unit deletes a decryption key by the deletion unit, the generation unit newly selects one of the decryption keys managed by the management unit, and the encryption variable corresponding to the newly selected decryption key The variable data according to claim 1, wherein variable data obtained by decrypting encrypted variable data included in a data group with the newly selected decryption key is embedded in the predetermined print format to generate print data. Printing system. And further comprising an acquisition means for acquiring a decryption key from the management means after printing based on the print data generated by the generation means is interrupted.
The generating unit embeds variable data obtained by decrypting encrypted variable data included in the encrypted variable data group corresponding to the decryption key acquired by the acquiring unit with the decryption key in the predetermined print format and prints The variable printing system according to claim 1, wherein data is generated. The deletion unit deletes at least one of the print data and variable data used for generation of the print data after printing based on the print data generated by the generation unit is completed. Item 4. The variable printing system according to any one of Items 1 to 3. A notification means for notifying the variable print control device of the number of data in a variable data group including a plurality of variable data to be embedded and printed in a predetermined print format sequentially;
An encryption key receiving means for receiving an encryption key of the number of data notified by the notification means from the variable printing control apparatus;
For each variable data included in the variable data group, an encrypted variable data group including encrypted variable data in which one of the encryption keys received by the encryption key receiving unit is associated with each other and encrypted. A variable printing request apparatus including a transmission means for transmitting to
For each encrypted variable data included in the encrypted variable data group, print data in which variable data obtained by decrypting the encrypted variable data with a corresponding decryption key is embedded in the predetermined print format is generated,
The variable print requesting apparatus, wherein the decryption key corresponding to the encrypted variable data is deleted after printing based on the generated print data is completed. A notification means for notifying the variable print control device of the number of data in a variable data group including a plurality of variable data to be embedded and printed in a predetermined print format sequentially;
An encryption key receiving means for receiving an encryption key of the number of data notified by the notification means from the variable printing control apparatus;
For each variable data included in the variable data group, an encrypted variable data group including encrypted variable data in which one of the encryption keys received by the encryption key receiving unit is associated with each other and encrypted. A program for causing a computer to function as a transmission means for transmitting to
For each encrypted variable data included in the encrypted variable data group, print data in which variable data obtained by decrypting the encrypted variable data with a corresponding decryption key is embedded in the predetermined print format is generated,
A program characterized in that the decryption key corresponding to the encrypted variable data is deleted after printing based on the generated print data is completed. Acquires a set of encryption keys and decryption keys for the number of variable data groups including a plurality of variable data to be printed by sequentially embedding in a predetermined print format, and transmits the encryption key for the number of data to the variable print requesting device. An encryption key transmission means;
Management means for managing the decryption key;
For each variable data included in the variable data group, the variable print requesting device includes an encrypted variable data group including encrypted variable data that is encrypted in association with one of the encryption keys transmitted by the encryption key transmitting unit. Receiving means for receiving from,
Generation means for generating print data for each encrypted variable data included in the encrypted variable data group by embedding variable data obtained by decrypting the encrypted variable data with a corresponding decryption key in the predetermined print format; ,
A variable printing control apparatus, comprising: a deletion unit that deletes a decryption key corresponding to the encrypted variable data from the management unit after printing based on the print data generated by the generation unit is completed. Acquires a set of encryption keys and decryption keys for the number of variable data groups including a plurality of variable data to be printed by sequentially embedding in a predetermined print format, and transmits the encryption key for the number of data to the variable print requesting device. An encryption key transmission means;
Management means for managing the decryption key;
For each variable data included in the variable data group, the variable print requesting device includes an encrypted variable data group including encrypted variable data that is encrypted in association with one of the encryption keys transmitted by the encryption key transmitting unit. Receiving means for receiving from,
Generation means for generating print data for each encrypted variable data included in the encrypted variable data group by embedding variable data obtained by decrypting the encrypted variable data with a corresponding decryption key in the predetermined print format; ,
A program for causing a computer to function as a deletion unit that deletes a decryption key corresponding to the encrypted variable data from the management unit after printing based on the print data generated by the generation unit is completed.

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