JP4168856B2 - Print job processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing system that separately transmits and receives a job command and job data of a print job, and relates to a printing system that can effectively prevent erroneous printing and unauthorized use due to a time lag between sessions.
[0002]
[Prior art]
As in the case of an Internet printing service such as BMLinkS, a network printing system that transmits and receives a print job in two communication sections of a job command and job data is known. That is, in such a printing system, the print server receives the job command from the client in the previous session and holds it, and executes the print job after receiving the job data from the client in the subsequent session. .
[0003]
However, in such a case, there is a time lag between the job command transmission / reception session and the job data transmission / reception session, so that there is a possibility that excessive print processing may be performed due to mixing of job data related to other print jobs. . In order to prevent such a situation, in the above printing system, when the print server receives a print command from the client, the job identifier of the print job related to the print command is attached and job data is transmitted to the print server. However, since identifiers in the specified range are repeatedly used within a specified period, if the time lag increases in Internet printing services that handle a large number of print jobs in a short time, erroneous printing is completely prevented. There was a problem that I could not. In addition, it is necessary to take effective measures against the problem of unauthorized use in which identifiers are stolen and unauthorized job data is input in the time lag.
[0004]
On the other hand, a print job processing method is known in which when two or more print jobs by the same person are continuously received within a predetermined period, these are processed as one print job (see Patent Document 1). However, this method discriminates a print job by a user ID, and even if this is applied to the printing system, the problem of erroneous printing and unauthorized use cannot be solved as in the case of the job identifier.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-259088
[Problems to be solved by the invention]
The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide an error due to a time lag between sessions in a print system that transmits and receives job commands and job data of a print job separately. An object of the present invention is to provide a printing system that can effectively prevent printing and unauthorized use.
[0007]
[Means for Solving the Problems]
The above object of the present invention is achieved by the following means.
[0008]
(1) A print job processing apparatus for separately receiving a job command and job data of a print job,
Job command receiving means for receiving a job command from a print job transmitting apparatus together with job data identification data for identifying job data of a print job relating to the job command;
Job data receiving means for receiving job data from the print job transmitting device;
Job data verification means for verifying whether the job data received by the job data reception means based on the job data identification data is job data of a print job related to the job command;
Print job processing means for processing a print job related to the job command when it is verified that the job data received by the job data receiving means is job data of the print job related to the job command;
A print job processing apparatus.
[0009]
(2) further comprising job identifier transmitting means for transmitting a job identifier of the print job relating to the job command to the print job transmitting apparatus;
The job data receiving means is for receiving job data together with a job identifier,
The job data verification unit verifies job data received by the job data reception unit based on job data identification data of a print job related to the job identifier.
The print job processing apparatus according to (1).
[0010]
(3) The job data identification data is unique encrypted data created based on the characteristics of the job data from the job data by a specific encryption method,
The job data verification means creates the encrypted data by the encryption method that created the job data identification data from the job data received by the job data reception means, and compares the job data identification data with the job data reception data The job data received by the means is verified.
The print job processing apparatus according to (1) or (2).
[0011]
(4) The print job processing apparatus according to (3), wherein the encrypted data is a message digest of the job data.
[0012]
(5) When it is verified that the job data received by the job data receiving unit is job data of a print job related to the job command, the print job processing unit converts the job data based on the job command. The print job processing apparatus according to any one of (1) to (4), which is for printing out.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
FIG. 1 is a block diagram showing the overall configuration of a printing system according to an embodiment of the present invention. As shown in FIG. 1, the printing system according to the present embodiment includes a personal computer 1 as a print job transmission device and a printer 2 as a print job processing device, which are mutually connected via a communication network 3. It is connected so that it can communicate. Note that the types and number of devices connected to the communication network 3 are not limited to the example shown in FIG.
[0015]
Next, the configuration of each of the above devices will be described. However, each of the above devices may include a component other than the components described below, or may not include some of the components described below. Good. In addition, portions having similar functions in each device are described only for the first time in order to avoid duplication of description, and descriptions thereof are omitted for the second and subsequent times.
[0016]
FIG. 2 is a block diagram showing an example of the configuration of the personal computer 1 according to the present embodiment. As shown in FIG. 2, the personal computer 1 includes a CPU 11, a ROM 12, a RAM 13, a hard disk 14, a display 15, an input device 16, and a network interface 17, which are mutually connected via a bus 18 for exchanging signals. It is connected.
[0017]
The CPU 11 performs control of the above parts, various arithmetic processes, and the like according to a program. The ROM 12 stores various programs and parameters for controlling the basic operation of the personal computer 1. The RAM 13 temporarily stores programs and data as a work area. The hard disk 14 stores an OS (operating system, basic software) and programs and parameters for controlling predetermined operations of the personal computer 1 described later.
[0018]
The display 15 displays various information. The input device 16 is a keyboard, a mouse, or the like, and is used for performing various inputs.
[0019]
The network interface 17 is an interface for connecting to a network and communicating with other devices on the network, and standards such as Ethernet (registered trademark), token ring, and FDDI are used.
[0020]
FIG. 3 is a block diagram illustrating an example of the configuration of the printer 2 according to the present embodiment. As illustrated in FIG. 3, the printer 2 includes a CPU 21, a ROM 22, a RAM 23, a hard disk 24, an operation panel unit 25, a printing unit 26, a network interface 27, and a bus 28.
[0021]
The operation panel unit 25 includes a touch panel, a fixed key outside the touch panel, a display lamp, and the like, and is used to perform various inputs and displays. The printing unit 26 performs printing based on the print job.
[0022]
The communication network 3 includes a public network such as a telephone network, a mobile communication network, ISDN, and a packet switching network, and a computer network such as a LAN, WAN, and the Internet.
[0023]
Next, an outline of the operation of the printing system in the present embodiment will be described. FIG. 4 is a flowchart showing the procedure of the print job transmission process of the personal computer 1 in this embodiment. The algorithm shown in the flowchart of FIG. 4 is stored as a program such as a printer driver in the hard disk 14 of the personal computer 1, and is read out to the RAM 13 and executed by the CPU 11 at the start of printing.
[0024]
In FIG. 4, the personal computer 1 first creates job data relating to a print job from a document file or image file to be printed, and stores it in the RAM 13 or the hard disk 14 (S101). Here, the job data is image data generated from the document file or the like, or a compression process of the image data, or converted into description language data interpretable by the printer 2.
[0025]
Next, a message digest of the job data created in step S101 is created and stored in the RAM 13 or the like (S102). Here, the message digest of job data is unique encrypted data created from job data using a one-way hash function, and consists of fixed-bit data as shown in FIG. While the probability that the message digests created from different data will be the same is very low, the original data cannot be restored from the message digest, so using the message digest for job data verification can result in misprinting due to misuse of job data. Unauthorized use due to theft can be effectively prevented. As such a one-way hash function, MD5, SHA-1, or the like can be used.
[0026]
Furthermore, the personal computer 1 creates a job command and stores it in the RAM 13 or the like (S103). The job commands include the number of copies, paper size, layout (function to place N pages of data in one page of output data (Nin1), etc.), single-sided / double-sided printing, sorting, finishing functions (staple function, folding function, Printing conditions such as a punch hole function) and user IDs can be included.
[0027]
Furthermore, a job command transmission message including the message digest information related to the message digest created in step S102 and the job command created in step S103 is created and stored in the RAM 13 or the like (S104). FIG. 6 is a diagram illustrating an example of a job command transmission message created by the personal computer 1 in the present embodiment. As shown in FIG. 6, the job command transmission message 41 uses HTTP as the communication protocol, and includes a HTTP command 411 and a job command 412 described in XML. The job command 412 includes message digest information 413 as an XML element, and the message digest information 413 includes a calculation method 414 and a message digest 415. The calculation method 414 is the type of hash function that created the message digest 415. FIG. 7 is a view showing another example of a job command transmission message created by the personal computer 1 in this embodiment. As shown in FIG. 7, the job command transmission message 42 includes an HTTP header 421 and job data 422, and the HTTP header 421 includes message digest information 423 including a calculation method 424 and a message digest 425. It is.
[0028]
Then, the job command transmission message created in step S104 is transmitted to the printer 2 via the network interface 17 and the communication network 3 (S105).
[0029]
Next, the personal computer 1 waits until a response message is received from the printer 2 (NO in S106). When the response message is received from the printer 2 via the communication network 3 and the network interface 17 (YES in S106), the personal computer 1 receives the response message. The job identifier included in the response message is extracted and stored in the RAM 13 or the like (S107).
[0030]
Further, a job data transmission message including the job identifier acquired in step S107 and the job data created in step S101 is created and stored in the RAM 13 or the like (S108). FIG. 8 is a diagram showing an example of a job data transmission message created by the personal computer 1 in the present embodiment. As shown in FIG. 8, the job data transmission message 43 uses HTTP as a communication protocol similarly to the job command transmission messages 41 and 42, and includes an HTTP header 431 and job data 432. A job identifier 433 is included in the HTTP header 431.
[0031]
Then, the job data transmission message created in step S108 is transmitted to the printer 2 via the network interface 17 and the communication network 3 (S109).
[0032]
FIG. 9 and FIG. 10 are flowcharts showing the print processing procedure of the printer 2 in the present embodiment. The algorithm shown in the flowcharts of FIGS. 9 and 10 is stored as a control program in the hard disk 24 of the printer 2 and is read out to the RAM 23 and executed by the CPU 21 at the start of processing.
[0033]
In FIG. 9, the printer 2 waits until a job command transmission message is received from the personal computer 1 (NO in S201), and receives a job command transmission message from the personal computer 1 via the communication network 3 and the network interface 27 (S201). YES), the received job command transmission message is stored in the RAM 23 or the like.
[0034]
Next, a job command is extracted from the job command transmission message received in step S201 (S202), a job identifier is assigned to the print job related to the acquired job command, and the print job management table stored in the RAM 23 or the like is stored. (S203). The print job management table will be described later. Further, a job instance is generated from the acquired job command, and the job identifier is added and stored in the RAM 23 or the like (S203). Here, the job instance is a substance of a job, which is obtained by converting the contents of the job command into a format that can be actually processed by the printer 2.
[0035]
Further, message digest information is extracted from the job command transmission message received in step S201 and recorded in the print job management table (S204). FIG. 11 is a diagram illustrating an example of a print job management table owned by the printer 2 in the present embodiment. As shown in FIG. 10, in the print job management table 51, a job identifier, a message digest, and a calculation method thereof are registered for each print job related to the received job command.
[0036]
Then, a response message including the job identifier is created (S205), and the created response message is transmitted to the personal computer 1 via the network interface 27 and the communication network 3 (S206).
[0037]
Next, in FIG. 10, the printer 2 waits until a job data transmission message is received from the personal computer 1 (NO in S <b> 207), and receives the job data transmission message from the personal computer 1 via the communication network 3 and the network interface 27. (YES in S207), the received job data transmission message is stored in the RAM 23 or the like. Further, the job identifier and job data are extracted from the received job data transmission message and stored in the RAM 23 or the like (S208).
[0038]
Next, with reference to the print job management table, a message digest is created from the job data acquired in step S208 by the calculation method for creating the message digest for the job identifier (S209), and the created message digest is managed as a print job. It collates with what is registered in the table (S210). If the message digest matches that registered (YES in S211), the job data acquired in step S208 is printed out using the job instance associated with the job identifier (S212). On the other hand, if the message digest does not match that registered (NO in S211), the job data acquired in step S208 is discarded and the printing process is terminated.
[0039]
In the above embodiment, the printer 2 itself calculates the message digest of the job data on the premise that the printer 2 can cope with all the calculation methods of the message digest received from the personal computer 1. There is no need to calculate the job data message digest corresponding to all the calculation methods. For example, this is done by using an external message digest calculation service reference, which is a service that performs the message digest calculation. Also good. In this case, the printer 2 has a message digest calculation service reference table 51 as shown in FIG. 12 in the RAM 23 or the like, and a message digest calculation service according to the message digest calculation method of the job identifier received with reference to this. It is possible to obtain a URL (Uniform Resource Locator) of a reference, access the service reference, and acquire a message digest of job data by the calculation method.
[0040]
Further, instead of the printer 2 having the message digest calculation service reference table 51, the personal computer 1 transmits to the printer 2 a job command transmission message including the message digest calculation service reference URL according to the message digest calculation method as message digest information. You may do it. FIGS. 13 and 14 are diagrams illustrating an example of a job command transmission message that the personal computer 1 transmits to the printer 2 in such a case. 13 includes an HTTP header 441 and a job command 442. In the job command 442, the message digest information 433 includes a calculation method 444, a message digest 445, and a message digest calculation service reference URL 446. Contains. 14 includes an HTTP header 451 and a job command 452, and includes a calculation method 454, a message digest 455, and a URL 456 of a message digest calculation service reference as message digest information 453 in the HTTP header 451. Is included.
[0041]
In the above embodiment, the job command transmission message and the job data transmission message transmitted from the personal computer 1 to the printer 2 use HTTP as a communication protocol, and the job command uses XML as a description format. In the invention, the communication protocol and job command description format at the time of transmission of the job command and job data are not limited to the above examples.
[0042]
In the above embodiment, whether or not the job data received by the printer 2 is the job data of the same print job as the previously received job command is verified by using the job data message digest. In the present invention, the data used for job data verification is not limited to this, and any format, technique, and calculation method can be used as long as the data can identify job data.
[0043]
In each of the above embodiments, the printing system of the present invention has been described by taking a personal computer as a print job transmission device and a printer as a print job processing device. However, the present invention is not limited to this, and a print job transmission is performed. In addition to a personal computer, the apparatus has a print job transmission function for computers such as workstations and servers, portable terminals such as mobile phones, PHS (registered trademark), PDAs, and electronic notebooks, digital copiers, and facsimile machines. It may be a multifunction peripheral device (MFP) or the like. In addition to the printer, the print job processing apparatus may be a multifunction peripheral device (MFP) having a printing function such as a digital copying machine or a facsimile machine. Further, the print job processing apparatus may be a print server that prints out a print job by a printing apparatus such as an external printer in addition to printing out the print job by itself. In this case, the print job processing apparatus uses the message digest described above. When the job data is verified in the job data verification process (YES in S210 and S211), instead of printing out the job data, the job data is transmitted to the external printing apparatus together with the job instance to be printed out. .
[0044]
The print job transmission apparatus and the print job processing apparatus according to the present invention can be realized by a dedicated hardware circuit for executing the above procedures, or by a CPU executing a program describing the procedures. Can do. When the present invention is realized by the latter, the program for operating the print job transmitting apparatus and the print job processing apparatus may be provided by a computer-readable recording medium such as a floppy (registered trademark) disk or a CD-ROM. It may be provided online via a network such as the Internet. In this case, the program recorded on the computer-readable recording medium is usually transferred and stored in a ROM, a hard disk or the like. Further, this program may be provided as, for example, a single application software, or may be incorporated in the software of the apparatus as a function of the print job transmission apparatus and the print job processing apparatus.
[0045]
In addition to the inventions described in claims 1 to 5 of the claims, the embodiments of the present invention described above include the inventions shown in the following supplementary notes 1 to 13.
[0046]
[Appendix 1] The print job processing unit prints the job command and the job data when it is verified that the job data received by the job data receiving unit is the job data of the print job related to the job command. The print job processing apparatus according to claim 1, which is transmitted to the apparatus.
[0047]
[Supplementary Note 2] A print job transmission apparatus for separately transmitting a job command and job data of a print job,
Print job creation means for creating job commands and job data;
Job data identification data creating means for creating job data identification data for identifying the job data;
Job command transmission means for transmitting the job command to the print job processing apparatus together with the job data identification data;
And a job data transmission unit configured to transmit the job data to the job processing apparatus.
[0048]
[Supplementary Note 3] Job identifier receiving means for receiving a job identifier of a print job relating to the job command from the print job processing apparatus,
The job data transmitting means transmits the job data together with the job identifier;
The print job transmission apparatus according to appendix 2.
[0049]
[Supplementary Note 4] The job data identification data is unique encrypted data created based on the characteristics of the job data from the job data by a specific encryption method.
The print job transmission apparatus according to appendix 2 or 3.
[0050]
[Supplementary Note 5] The print job transmitting apparatus according to Supplementary Note 4, wherein the encrypted data is a message digest of the job data.
[0051]
[Appendix 6] A printing system for separately transmitting and receiving a job command and job data of a print job, wherein a print job transmission device and a print job processing device are connected to each other via a network,
The print job transmission device includes:
Print job creation means for creating job commands and job data;
Job data identification data creating means for creating job data identification data for identifying the job data;
Job command transmission means for transmitting the job command to the print job processing apparatus together with the job data identification data;
Job data transmission means for transmitting the job data to the job processing device;
Have
The print job processing apparatus includes:
Job command receiving means for receiving the job command from the print job transmitting apparatus together with the job data identification data;
Job data receiving means for receiving job data from the print job transmitting device;
Job data verification means for verifying whether the job data received by the job data reception means based on the job data identification data is job data of a print job related to the job command;
And print job processing means for processing the print job related to the job command when it is verified that the job data received by the job data receiving means is job data of the print job related to the job command. And
Printing system.
[0052]
[Supplementary Note 7] A print job processing method for separately receiving a job command and job data of a print job,
A job command receiving step for receiving a job command together with job data identification data for identifying job data of a print job related to the job command;
A job data receiving step for receiving job data;
A job data verification step for verifying whether the job data received by the job data reception step based on the job data identification data is job data of a print job according to the job command;
A print job processing step for processing a print job related to the job command when it is verified that the job data received in the job data reception step is job data of the print job related to the job command;
A print job processing method characterized by comprising:
[0053]
[Appendix 8] A print job transmission method for separately transmitting a job command and job data of a print job,
A print job creation step for creating job commands and job data;
A job data identification data creating step for creating job data identification data for identifying the job data;
A job command transmission step of transmitting the job command together with the job data identification data;
A job data transmission step for transmitting the job data;
A print job transmission method characterized by comprising:
[0054]
[Supplementary Note 9] A printing method in a printing system for separately transmitting and receiving a job command and job data of a print job, wherein the print system communicates with each other via a network between a print job transmitting device and a print job processing device. Connected to be possible
A print job creating step in which the print job transmitting device creates a job command and job data;
A job data identification data creating step in which the print job transmitting apparatus creates job data identification data for identifying the job data;
A job command transmission step in which the print job transmission device transmits the job command together with the job data identification data to a print job processing device;
A job command receiving step in which the print job processing device receives the job command from the print job transmission device together with the job data identification data;
A job data transmission step in which the print job transmission device transmits the job data to the job processing device;
A job data receiving step in which the print job processing apparatus receives job data from a print job transmitting apparatus;
A job data verification step for verifying whether or not the job data received by the job data reception step based on the job data identification data is job data of a print job according to the job command;
Print job processing for processing the print job relating to the job command when the print job processing apparatus verifies that the job data received in the job data receiving step is job data relating to the job command. And having a step,
Printing method.
[0055]
[Supplementary Note 10] A print job processing program for separately receiving a job command and job data of a print job,
A job command receiving step for receiving a job command together with job data identification data for identifying job data of a print job related to the job command;
A job data receiving step for receiving job data;
A job data verification step for verifying whether the job data received by the job data reception step based on the job data identification data is job data of a print job according to the job command;
A print job processing step for processing a print job related to the job command when it is verified that the job data received in the job data reception step is job data of the print job related to the job command;
A print job processing program for causing a print job processing apparatus to execute the above.
[0056]
[Supplementary Note 11] A computer-readable recording medium on which the print job processing program according to Supplementary Note 10 is recorded.
[0057]
[Supplementary Note 12] A print job transmission program for separately transmitting a job command and job data of a print job,
A print job creation step for creating job commands and job data;
A job data identification data creating step for creating job data identification data for identifying the job data;
A job command transmission step of transmitting the job command together with the job data identification data;
A job data transmission step for transmitting the job data;
A print job transmission program for causing a print job transmission apparatus to execute the above.
[0058]
[Supplementary Note 13] A computer-readable recording medium on which the print job transmission program according to Supplementary Note 12 is recorded.
[0059]
【The invention's effect】
As described above, in a printing system that separately transmits and receives a job command and job data of a print job, the job command is received from the print job transmission device, and then the job data is received from the same print job transmission device. When the time lag is large, job identifiers of a predetermined range are repeatedly used within a predetermined period. Therefore, job data of another print job having the same job identifier (for example, transmitted from another print job transmission apparatus) However, according to the printing system of the present invention, since only the job data verified by the job data identification data is printed, the job command and the job data are incorrect. It is possible to effectively prevent erroneous printing due to different combinations. Even if the job identifier is stolen in the above time lag, only the job data verified by the job data identification data is printed, so it is possible to effectively prevent printing by unauthorized use by unauthorized persons. it can.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an overall configuration of a printing system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing an example of the configuration of the personal computer 1 in FIG.
FIG. 3 is a block diagram illustrating an example of a configuration of a printer 2 in FIG.
FIG. 4 is a flowchart illustrating a procedure of print job transmission processing of the personal computer 1;
FIG. 5 is a diagram showing an example of a message digest created by the personal computer 1 from job data.
6 is a diagram showing an example of a job command transmission message created by the personal computer 1. FIG.
FIG. 7 is a diagram showing another example of a job command transmission message created by the personal computer 1;
FIG. 8 is a diagram showing an example of a job data transmission message created by the personal computer 1;
FIG. 9 is a flowchart illustrating a printing process procedure of the printer.
FIG. 10 is a flowchart illustrating a printing process procedure of the printer 2 subsequent to FIG. 9;
FIG. 11 is a diagram illustrating an example of a print job management table owned by the printer 2;
FIG. 12 is a diagram illustrating an example of a message digest calculation service reference table held by the printer 2;
13 is a diagram illustrating an example of a job command transmission message transmitted from the personal computer 1 to the printer 2. FIG.
FIG. 14 is a diagram illustrating another example of a job command transmission message transmitted from the personal computer 1 to the printer 2;
[Explanation of symbols]
1 ... PC
2. Printer,
3 ... communication network,
11, 21 ... CPU,
12, 22 ... ROM,
13, 23 ... RAM,
14, 24 ... Hard disk,
15 ... Display,
16: Input device,
17, 27 ... Network interface,
18, 28 ... Bus,
25 ... operation panel section,
26: Printing section.

Claims (18)

A print job processing apparatus for separately receiving a job command and job data of a print job,
Job command receiving means for receiving a job command from a print job transmitting apparatus together with job data identification data for identifying job data of a print job relating to the job command;
Job data receiving means for receiving job data from the print job transmitting device;
Job data verification means for verifying whether the job data received by the job data reception means based on the job data identification data is job data of a print job related to the job command;
Print job processing means for processing a print job related to the job command when it is verified that the job data received by the job data receiving means is job data of the print job related to the job command;
A print job processing apparatus. Job identifier transmission means for transmitting the job identifier of the print job relating to the job command to the print job transmission device;
The job data receiving means is for receiving job data together with a job identifier,
The job data verification unit verifies job data received by the job data reception unit based on job data identification data of a print job related to the job identifier.
The print job processing apparatus according to claim 1. The job data identification data is unique encrypted data created based on the characteristics of the job data from the job data by a specific encryption method,
The job data verification means creates the encrypted data by the encryption method that created the job data identification data from the job data received by the job data reception means, and compares the job data identification data with the job data reception data The job data received by the means is verified.
The print job processing apparatus according to claim 1.   The print job processing apparatus according to claim 3, wherein the encrypted data is a message digest of the job data.   The print job processing unit prints out the job data based on the job command when it is verified that the job data received by the job data receiving unit is the job data of the print job related to the job command. The print job processing apparatus according to claim 1, wherein the print job processing apparatus is one.   The print job processing unit transmits the job command and the job data to a printing apparatus when it is verified that the job data received by the job data receiving unit is the job data of the print job related to the job command. The print job processing apparatus according to claim 1, wherein the print job processing apparatus is one. A print job transmission apparatus that transmits a job command and job data of a print job separately,
Print job creation means for creating job commands and job data;
Job data identification data creating means for creating job data identification data for identifying the job data;
Job command transmission means for transmitting the job command to the print job processing apparatus together with the job data identification data;
Job data transmission means for transmitting the job data to the job processing device;
A print job transmitting apparatus. Job identifier receiving means for receiving a job identifier of a print job relating to the job command from the print job processing apparatus;
The job data transmitting means transmits the job data together with the job identifier;
The print job transmission apparatus according to claim 7. The job data identification data is unique encrypted data created based on the characteristics of the job data from the job data by a specific encryption method.
The print job transmission apparatus according to claim 7 or 8.   The print job transmission apparatus according to claim 9, wherein the encrypted data is a message digest of the job data. A printing system that separately transmits and receives job commands and job data of a print job, wherein a print job transmission device and a print job processing device are connected to each other via a network,
The print job transmission device includes:
Print job creation means for creating job commands and job data;
Job data identification data creating means for creating job data identification data for identifying the job data;
Job command transmission means for transmitting the job command to the print job processing apparatus together with the job data identification data;
Job data transmission means for transmitting the job data to the job processing device;
Have
The print job processing apparatus includes:
Job command receiving means for receiving the job command from the print job transmitting apparatus together with the job data identification data;
Job data receiving means for receiving job data from the print job transmitting device;
Job data verification means for verifying whether the job data received by the job data reception means based on the job data identification data is job data of a print job related to the job command;
And print job processing means for processing the print job related to the job command when it is verified that the job data received by the job data receiving means is job data of the print job related to the job command. And
Printing system. A print job processing method for separately receiving a job command and job data of a print job,
A job command receiving step for receiving a job command together with job data identification data for identifying job data of a print job related to the job command;
A job data receiving step for receiving job data;
A job data verification step for verifying whether the job data received by the job data reception step based on the job data identification data is job data of a print job according to the job command;
A print job processing step for processing a print job related to the job command when it is verified that the job data received in the job data reception step is job data of the print job related to the job command;
A print job processing method characterized by comprising: A print job transmission method for transmitting a job command and job data of a print job separately,
A print job creation step for creating job commands and job data;
A job data identification data creating step for creating job data identification data for identifying the job data;
A job command transmission step of transmitting the job command together with the job data identification data;
A job data transmission step for transmitting the job data;
A print job transmission method characterized by comprising: A printing method in a printing system in which job commands and job data of a print job are separately transmitted and received, wherein the print job transmission device and the print job processing device are connected to each other via a network so that they can communicate with each other. And
A print job creating step in which the print job transmitting device creates a job command and job data;
A job data identification data creating step in which the print job transmitting apparatus creates job data identification data for identifying the job data;
A job command transmission step in which the print job transmission device transmits the job command together with the job data identification data to a print job processing device;
A job command receiving step in which the print job processing device receives the job command from the print job transmission device together with the job data identification data;
A job data transmission step in which the print job transmission device transmits the job data to the job processing device;
A job data receiving step in which the print job processing apparatus receives job data from a print job transmitting apparatus;
A job data verification step for verifying whether or not the job data received by the job data reception step based on the job data identification data is job data of a print job according to the job command;
Print job processing for processing the print job relating to the job command when the print job processing apparatus verifies that the job data received in the job data receiving step is job data relating to the job command. And having a step,
Printing method. A print job processing program for separately receiving a job command and job data of a print job,
A job command receiving step for receiving a job command together with job data identification data for identifying job data of a print job related to the job command;
A job data receiving step for receiving job data;
A job data verification step for verifying whether the job data received by the job data reception step based on the job data identification data is job data of a print job according to the job command;
A print job processing step for processing a print job related to the job command when it is verified that the job data received in the job data reception step is job data of the print job related to the job command;
A print job processing program for causing a print job processing apparatus to execute the above.   A computer-readable recording medium on which the print job processing program according to claim 15 is recorded. A print job transmission program for separately transmitting a job command and job data of a print job,
A print job creation step for creating job commands and job data;
A job data identification data creating step for creating job data identification data for identifying the job data;
A job command transmission step of transmitting the job command together with the job data identification data;
A job data transmission step for transmitting the job data;
A print job transmission program for causing a print job transmission apparatus to execute the above.   A computer-readable recording medium on which the print job transmission program according to claim 17 is recorded.

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