JP2004252888A - Security printing program, security printing system and storage medium storing security printing program - Google Patents

Security printing program, security printing system and storage medium storing security printing program Download PDF

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Publication number
JP2004252888A
JP2004252888A JP2003044881A JP2003044881A JP2004252888A JP 2004252888 A JP2004252888 A JP 2004252888A JP 2003044881 A JP2003044881 A JP 2003044881A JP 2003044881 A JP2003044881 A JP 2003044881A JP 2004252888 A JP2004252888 A JP 2004252888A
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JP
Japan
Prior art keywords
function
print data
printing
encryption key
identifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003044881A
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Japanese (ja)
Inventor
Tsutomu Yuki
力 結城
Original Assignee
Ricoh Co Ltd
株式会社リコー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd, 株式会社リコー filed Critical Ricoh Co Ltd
Priority to JP2003044881A priority Critical patent/JP2004252888A/en
Publication of JP2004252888A publication Critical patent/JP2004252888A/en
Pending legal-status Critical Current

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Abstract

A security printing program with a high security level that prevents print data from leaking to a third party even when an unauthorized access is made.
As shown in FIG. 4, print data is divided into five print data. Then, a sequence number is added to the divided print data at the beginning of the divided print data. The transmission order is determined randomly (in the order of 4, 3, 5, 2, 1). Then, a sequence number is added to the head of the divided print data (S12). The order in which the divided print data is transmitted to the printing apparatus is determined (S13) and transmitted. Upon receiving the divided print data, the printing apparatus stores the data in the memory (S20), and transmits an assembly request to the print data assembly control unit 38. Upon receiving the assembling request, the print data assembling control unit 38 assembles the print data based on the sequence numbers of the divided print data (S21). This is transmitted to the print control unit 42 and printing is performed.
[Selection diagram] Fig. 4

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to print security printing that prevents information leakage when print data is transmitted from a terminal device to a printing device.
[Prior art]
Recently, in a network environment using a wireless LAN (local area network), transmission and reception of various types of data have become widespread. Under such an environment, it has been pointed out that while the usability of the OA device is improved, there is a risk that data may be exploited by a third party.
Specifically, as shown in FIG. 15, when print data is sent from a PC to a printing apparatus and a third party eavesdrops on the network due to unauthorized access, the print data is printed by a third party. There is a problem printing on the device. In such a situation, security cannot be said to be sufficient.
Therefore, there are the following technologies as technologies for ensuring security.
[Patent Document 1]
JP 2000-222150
[Patent Document 2]
JP 2001-67191A
[Patent Document 3]
JP-A-2001-117744
Patent Document 1 relates to a technique for storing security of print data by storing a password in a print job.
Patent Document 2 relates to a technique for storing security of print data by storing a print expiration date in a print job.
Patent Document 3 relates to a technique for ensuring security of print data using a client / server.
[0003]
[Problems to be solved by the invention]
By the way, in order to secure the security of the print data, it is ideal that the security setting is as simple as possible and the security is high.
Therefore, an object of the present invention is to provide a security printing program, a security printing system, and a storage medium storing a security printing program with a high security level, in which print data does not leak to a third party even when unauthorized access (wiretapping) is performed. It is to provide.
[0004]
[Means for Solving the Problems]
According to the first aspect of the present invention, when transmitting print data from the terminal device to the printing device and performing print processing, the terminal device side divides the print data before transmission,
A number adding function for adding a sequence number to the print data divided by the dividing function, a transmission order determining function for randomly determining the transmission order of the print data to which the sequence number is added by the number adding function, and a transmission order determining A transmission function of transmitting the print data divided according to the transmission order determined by the function to the printing apparatus side, a reception function of receiving the print data transmitted by the transmission function on the printing apparatus side, and a reception function of the reception function A security printing program allows a computer to execute a restoration function for assembling and restoring the divided print data based on the sequence number added by the number addition function and a printing function for printing the print data restored by the restoration function. By realizing, the above-mentioned object is achieved.
According to the second aspect of the present invention, when transmitting print data from the terminal device to the printing device and performing print processing, the terminal device side divides the print data before transmission, and the print function divided by the division function. A number addition function that adds a sequence number to data, an encryption function that encrypts print data to which a sequence number is added by this number addition function, and a random transmission order of print data that is encrypted by this encryption function A transmission order determining function, a transmission function for transmitting the print data divided according to the transmission order determined by the transmission order determination function to the printing apparatus, and a print apparatus transmitting the print data transmitted by the transmission function. , A decryption function for decrypting the divided and encrypted print data received by the receiving function, and a decryption function for decrypting the print data. A security printing program causes a computer to realize a restoration function of assembling and restoring print data based on the sequence number added by the number addition function and a printing function of printing print data restored by the restoration function. Thereby, the above-mentioned object is achieved.
[0005]
According to the third aspect of the present invention, when print data is transmitted from the terminal device to the printing device and print processing is performed, the terminal device side divides the print data before transmission, and the print function divided by the division function. A number addition function for adding a sequence number to data, an encryption key creation function for randomly creating an encryption key for print data to which a sequence number has been added by the number addition function, and an encryption key created with this encryption key creation function An encryption function for encrypting print data, a transmission order determination function for randomly determining the transmission order of the print data encrypted by the encryption function, and a division according to the transmission order determined by the transmission order determination function A transmission function of transmitting the print data transmitted to the printing apparatus, a reception function of receiving the print data transmitted by the transmission function at the printing apparatus, An encryption key acquisition function of acquiring an encryption key obtained by encrypting data, a decryption function of receiving the received data by the reception function, and decrypting the divided and encrypted print data with the encryption key acquired by the encryption key acquisition function; The security printing includes a restoration function for assembling and restoring the print data decoded by the decoding function based on the sequence number added by the number addition function, and a printing function for printing the print data restored by the restoration function. The above object is achieved by causing a computer to realize the program.
[0006]
According to the fourth aspect of the present invention, when print data is transmitted from the terminal device to the printing device and print processing is performed, the terminal device side divides the print data before transmission, and the print function divided by the division function. An identifier creation function for creating an identifier of data and an identifier table at the same time, an identifier addition function for adding the identifier created by the identifier creation function to the divided print data, and an identifier added by the identifier addition function Encryption key creation function to randomly create an encryption key for printed data, encryption function to encrypt print data with the encryption key created by this encryption key creation function, and printing encrypted by this encryption function A transmission order determination function for randomly determining the data transmission order, and printing of print data divided according to the transmission order determined by the transmission order determination function. A transmitting function for transmitting to the apparatus side, a receiving function for receiving print data transmitted by the transmitting function at the printing apparatus side, an encryption key for encrypting the print data, and an identifier and identifier table created by the identifier creating function And a decryption function for decrypting the divided and encrypted print data received by the reception function with the encryption key and the encryption key acquired by the identifier acquisition function, and the decryption function A restoring function for assembling and restoring the print data decrypted by the encryption key and the identifier and the identifier table acquired by the identifier acquiring function, and a printing function of printing the print data restored by the restoring function. The object is achieved by causing a computer to execute the security printing program.
[0007]
According to a fifth aspect of the present invention, in a printing system for transmitting print data from a terminal device to a printing device and performing a printing process, the security printing program according to the first, second, third or fourth aspect stores the security printing program. It is characterized by having been done.
According to a sixth aspect of the present invention, a security printing program according to the first, second, third, or fourth aspect is stored.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a diagram showing the overall configuration of the present embodiment.
A PC (Personal Computer) 10 is a device that creates print data of a document by a word processor or the like, and a printing device 30 is a device that prints print data of a document. The external storage devices 12 and 32 of the PC 10 and the printing device 30 are devices that read and write storage media. The PC 10 and the printing device 30 are connected by a LAN (local area network) device 60, and can transmit and receive information.
[0009]
FIG. 2 is a diagram illustrating a configuration of the PC 10.
A RAM (random access memory) / ROM (read only memory) control unit 14 controls a memory such as a RAM / ROM. Here, the ROM stores program codes and data for activating the PC 10, and the RAM functions as a main memory of a CPU (Central Processing Unit) and is used for program codes and data codes.
The CPU control section 16 generally controls access to various programs and devices connected to the system bus based on program codes and the like stored in the ROM by the CPU.
The print data division control unit 18 controls the print data division operation, and the encryption control unit 20 controls the division print data encryption operation.
[0010]
The I / O control unit 22 controls the storage device, the input / output device, and the network I / F device as a whole.
The input / output control unit 24 generally controls input / output of a keyboard, a mouse, a display, and the like, and the network control unit 26 totally controls communication with a partner device via a LAN card.
The identifier control unit 28 controls an identifier operation of the divided print data.
[0011]
FIG. 3 is a diagram illustrating a configuration of the printing device 30.
The RAM / ROM control unit 34 controls a memory such as a RAM / ROM. Here, the ROM stores a program code and data for activating the device, and the RAM is a RAM that functions as a main memory of the CPU and is used for the program code and the data code.
The CPU controller 36 generally controls access to various programs and devices connected to the system bus based on the program codes and the like stored in the ROM by the CPU. Control the operation of assembling.
The encoding control unit 40 controls the encoding operation of the encrypted divided print data, and the print control unit 42 controls the printing of the print data.
The I / O control unit 44 controls the storage device, the input / output device, and the network I / F device in general, and the input / output control unit 46 controls the input / output of the panel and the like.
The network control unit 48 controls the communication with the partner device via the LAN card, and the identifier management unit 50 controls the identifier operation of the divided print data.
[0012]
Next, a first embodiment will be described with reference to FIGS. FIG. 4 is a diagram for explaining the first embodiment, and FIG. 5 is a flowchart showing a processing procedure of the first embodiment.
As shown in FIG. 4, the print data is divided into five parts (A, B, C, D, and E). Then, a sequence number (1, 2, 3, 4, 5) is added to the divided print data at the beginning of the divided print data. The transmission order is determined randomly (in the order of 4, 3, 5, 2, 1).
In the first embodiment, the processing on the PC 10 side is as follows.
First, when the power of the PC 10 is turned on, the following initialization is performed.
(1) A hardware check is performed to determine whether there is any abnormality in a peripheral device, a memory check, or the like.
(2) The program of the PC 10 is loaded from the ROM via the RAM / ROM control unit 14.
(3) When printing a document using a word processor or the like, print data is stored in the memory via the RAM / ROM control unit 14 (step 10), and a division request is transmitted to the print data division control unit 18.
(4) Upon receiving the division request, the print data division control unit 18 divides the print data equally (step 11). In this division method, the size of the print data and the number of divisions are determined in advance by input from a keyboard or the like via the input / output control unit 24, and recorded on an HDD (hard disk drive) or the like via the I / O control unit 22. Keep it.
(5) Further, a sequence number is added to the head of the divided print data (step 12).
(6) Determine the order of transmitting the divided print data to the printing device (step 13). As an example of the transmission order method, a random value of each divided print data is obtained and transmitted in ascending order of the random value.
FIG. 6 shows an example of the relationship between the sequence number of the divided print data, the random value, and the transmission order.
(7) The divided print data is transmitted to the printing device 30 via the network control unit 26 in accordance with the transmission order (Step 14).
[0013]
Next, processing on the printing apparatus 30 side will be described.
When the printing apparatus 30 is turned on, the following initialization is performed.
1. A hardware check is performed to determine whether there is any abnormality in the peripheral device or memory check.
2. The program of the printing device 30 is loaded from the ROM via the RAM / ROM control unit 34.
3. When the divided print data is received by the network control unit 48, the divided print data is stored in the memory via the RAM / ROM control unit 34 (step 20), and an assembling request is sent to the print data assembling control unit 38. Send.
4. Upon receiving the assembling request, the print data assembling control unit 38 assembles the print data based on the sequence numbers of the divided print data (step 21).
5. The print data assembled by the print data assembly control unit 38 is transmitted to the print control unit 42, and printing is performed (step 22).
[0014]
Next, a second embodiment will be described. FIG. 7 is a diagram for explaining the second embodiment, and FIG. 8 is a flowchart showing a processing procedure of the second embodiment.
The second embodiment will be described with respect to differences from the first embodiment.
As shown in FIG. 7, the encrypted divided print data is characterized in that the entire sequence number + divided print data is encrypted (the portion of the pattern).
The processing of the PC 10 is performed as follows.
(5 ') Encrypt the divided print data (step 33). The encryption method includes a BASE64 method and the like.
(6 ') Next, the order in which the encrypted divided print data is transmitted to the printing device 30 is determined (step 34).
(7 ') The divided print data is transmitted to the printing device 30 via the network control unit 26 in accordance with the transmission order (step 35).
On the other hand, the processing on the printing device 30 side is as follows.
When the encrypted divided print data is received by the 3 'network control unit 48, the encrypted divided print data is stored in the memory via the RAM / ROM control unit 34 (step 40), and the print data assembly control is performed. The request for assembly is transmitted to the unit 38.
3 '' The encrypted divided print data is decrypted (step 41).
Subsequent processing is the same as in the first embodiment (steps 42 and 43).
[0015]
Next, a third embodiment will be described. 9 and 10 are diagrams for explaining the third embodiment, and FIG. 11 is a flowchart showing a processing procedure of the third embodiment.
In FIG. 9, the encrypted divided print data is subjected to encryption based on the sequence number + the entire divided print data based on the encryption key (a portion having a pattern on the background).
FIG. 10 shows encryption key information corresponding to each division No. (sequence number). The encryption key is represented by a hexadecimal number or a character string of a random value. In this figure, the background is patterned to facilitate explanation. Actually, it is used as a hexadecimal number or a character string of a random value.
[0016]
Next, the processing of the third embodiment will be described, but the same parts as those of the second embodiment will be omitted, and only different points will be described.
(5 ″) An encryption key for each divided print data is determined (step 53). As a method of determining this encryption key, it is represented by a hexadecimal number using a random value.
(6 '') The divided print data is encrypted based on the encryption key (step 54). As a method of encrypting an encryption key, there is a 56-bit DES (Data Encryption Standard) which is a current representative common key algorithm.
(7 ″) The encryption key information is stored in the storage medium stored in the external storage device 22 via the I / O control unit 24 (Step 55).
(8 ″) The order of transmitting the encrypted divided print data to the printing device 30 is determined (step 56).
(9 '') The encrypted divided print data is transmitted to the printing device 30 via the network control unit 26 in accordance with the transmission order (step 57).
[0017]
On the other hand, the processing of the printing apparatus 30 is changed from the 2 ″ processing of the second embodiment as follows.
2a. When the storage medium is set in the external storage device 32 via the I / O control unit 44, the encryption key information is extracted from the storage medium (Step 61; Y, Step 62).
2b. The encrypted divided print data is decrypted based on the encryption key information (step 63).
The subsequent processing is the same as in the second embodiment (steps 64 and 65).
[0018]
Next, a fourth embodiment will be described. 12 and 13 are diagrams for explaining the fourth embodiment, and FIG. 14 is a flowchart showing a processing procedure of the fourth embodiment.
In FIG. 12, an identifier to be added to the head of the divided print data is created from the divided print data.
In FIG. 13, examples of the encryption key information and the identifier information identifier corresponding to each division No. (sequence number) include those created by time + PC unique (serial number) and random values.
[0019]
Next, the processing of the fourth embodiment will be described.
The processing 5 on the PC 10 side of the first embodiment is changed to the following processing.
(5a) Create an identifier for each divided print data (step 72).
(4b) An identifier is added to the head of the divided print data (step 73).
Further, (7 ″) of the process on the PC 10 side of the third embodiment is changed to the next process.
(7a) The encryption key information and the identifier information are stored in the storage medium stored in the external storage device 22 via the I / O control unit 22 (Step 77).
On the other hand, the processing on the printing apparatus 30 side changes the processing 2a in the third embodiment to the next processing.
When the storage medium is set in the external storage device 32 via the 2a 'I / O control unit 44, the encryption key information and the identifier information are extracted from the storage medium (step 82).
Then, the process 4 of the first embodiment is changed as follows.
4a Upon receiving the assembling request, the print data assembling control unit 38 assembles the print data based on the identifier information (step 84).
[0020]
Next, a fifth embodiment will be described.
As shown in FIG. 1, a PC 10 storing a program interface of the PC 10 in the first, second, third, and fourth embodiments and a printing apparatus in the first, second, third, and fourth embodiments. The present invention provides a configuration serving as a printing device that stores a program interface on the side of the printer 30.
[0021]
Next, a sixth embodiment will be described.
As shown in FIG. 1, in order to provide the PC 10 and the printing apparatus 30 with the program interface on the PC 10 side and the printing apparatus 30 side in the first, second, third, and fourth embodiments, The program interface of the printing apparatus 30 and an installation kit for installing the program interface on the PC 10 and the printing apparatus 30 are stored in a computer-readable storage medium.
[0022]
【The invention's effect】
According to the first aspect of the invention, by dividing the print data, unauthorized access (interception) by a third party can be prevented, and security can be ensured.
According to the second aspect of the invention, by encrypting the divided print data, it becomes difficult for a third party to analyze the divided print data, and security can be secured.
According to the third aspect of the invention, by preparing an encryption key for each divided print data, it becomes difficult for a third party to analyze each divided print data, and security can be secured. The print data of another person is similarly secured. Also, since the encryption information is not stored in the print data, it does not need to flow on the network.
[0023]
According to the fourth aspect of the invention, security can be ensured by storing information for assembling the divided print data in a storage medium (not flowing over a network).
According to the fifth aspect of the invention, by using the security printing system for the PC and the printing apparatus, it is possible to perform printing with security.
According to the sixth aspect of the present invention, the security printing function of the present invention can be used by installing the security printing function on an existing user's PC and printing apparatus.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of the present embodiment.
FIG. 2 is a diagram illustrating a configuration of a PC (personal computer).
FIG. 3 is a diagram illustrating a configuration of a printing apparatus.
FIG. 4 is a diagram illustrating a process according to the first embodiment.
FIG. 5 is a flowchart illustrating a processing procedure according to the first embodiment.
FIG. 6 is a diagram illustrating a relationship between a sequence number of divided print data and a transmission order in the first embodiment.
FIG. 7 is a diagram illustrating a process according to a second embodiment.
FIG. 8 is a flowchart illustrating a processing procedure according to the second embodiment.
FIG. 9 is a diagram illustrating a process according to a third embodiment.
FIG. 10 is a diagram illustrating an encryption key used in a third embodiment.
FIG. 11 is a flowchart illustrating a processing procedure according to a third embodiment.
FIG. 12 is a diagram illustrating a process according to a fourth embodiment.
FIG. 13 is a diagram showing an encryption key and an identifier information table used in the fourth embodiment.
FIG. 14 is a flowchart illustrating a processing procedure according to a fourth embodiment.
FIG. 15 is a diagram illustrating a configuration of a printing apparatus using a conventional LAN.
[Explanation of symbols]
10 PC (personal computer)
12 external storage device 14 RAM / ROM control unit 16 CPU control unit 18 print data division control unit 20 encryption control unit 22 I / O control unit 24 input / output control unit 26 network control unit 28 identifier control unit 30 printing device 32 external storage Device 34 RAM / ROM control unit 36 CPU control unit 38 Print data assembly control unit 40 Encoding control unit 42 Print control unit 44 I / O control unit 46 Input / output control unit 48 Network control unit 50 Identifier management unit 60 LAN

Claims (6)

  1. When transmitting print data from a terminal device to a printing device and performing print processing,
    A division function for dividing the print data before transmission on the terminal device side,
    A number adding function of adding a sequence number to the print data divided by the dividing function,
    A transmission order determining function for randomly determining the transmission order of the print data to which the sequence number is added by the number adding function;
    A transmission function of transmitting the print data divided according to the transmission order determined by the transmission order determination function to the printing apparatus,
    A receiving function for receiving print data transmitted by the transmitting function on the printing apparatus side,
    A restoration function of assembling and restoring the divided print data received by the reception function based on the sequence number added by the number addition function,
    A security printing program for causing a computer to realize a printing function of printing print data restored by the restoration function.
  2. When transmitting print data from a terminal device to a printing device and performing print processing,
    A division function for dividing the print data before transmission on the terminal device side,
    A number adding function of adding a sequence number to the print data divided by the dividing function,
    An encryption function for encrypting print data to which a sequence number has been added by the number addition function;
    A transmission order determination function for randomly determining the transmission order of the print data encrypted by the encryption function,
    A transmission function of transmitting the print data divided according to the transmission order determined by the transmission order determination function to the printing apparatus,
    A receiving function for receiving print data transmitted by the transmitting function on the printing apparatus side,
    A decryption function for decrypting the divided and encrypted print data received by the reception function;
    A restoration function for assembling and restoring the print data decoded by the decoding function based on the sequence number added by the number addition function,
    A security printing program for causing a computer to realize a printing function of printing print data restored by the restoration function.
  3. When transmitting print data from a terminal device to a printing device and performing print processing,
    A division function for dividing the print data before transmission on the terminal device side,
    A number adding function of adding a sequence number to the print data divided by the dividing function,
    An encryption key creation function for randomly creating an encryption key for print data to which a sequence number has been added by the number addition function;
    An encryption function for encrypting print data with an encryption key created by the encryption key creation function,
    A transmission order determination function for randomly determining the transmission order of the print data encrypted by the encryption function,
    A transmission function of transmitting the print data divided according to the transmission order determined by the transmission order determination function to the printing apparatus,
    A receiving function for receiving print data transmitted by the transmitting function on the printing apparatus side,
    An encryption key acquisition function for acquiring an encryption key obtained by encrypting the print data;
    A decryption function of receiving the received data by the receiving function, and decrypting the divided print data with the encryption key obtained by the encryption key obtaining function;
    A restoration function for assembling and restoring the print data decoded by the decoding function based on the sequence number added by the number addition function,
    A security printing program for causing a computer to realize a printing function of printing print data restored by the restoration function.
  4. When transmitting print data from a terminal device to a printing device and performing print processing,
    A division function for dividing the print data before transmission on the terminal device side,
    An identifier creation function for creating an identifier of the print data divided by this division function and also creating an identifier table at the same time;
    An identifier adding function of adding an identifier created by the identifier creating function to the divided print data;
    An encryption key creation function for randomly creating an encryption key for print data to which an identifier has been added by the identifier addition function;
    An encryption function for encrypting print data with an encryption key created by the encryption key creation function,
    A transmission order determination function for randomly determining the transmission order of the print data encrypted by the encryption function,
    A transmission function of transmitting the print data divided according to the transmission order determined by the transmission order determination function to the printing apparatus,
    A receiving function for receiving print data transmitted by the transmitting function on the printing apparatus side,
    An encryption key for encrypting the print data and an encryption key and an identifier acquisition function for acquiring an identifier and an identifier table created by the identifier creation function,
    A decryption function of decrypting the divided and encrypted print data received by the reception function with the encryption key and the encryption key acquired by the identifier acquisition function;
    A restoration function for assembling and restoring the print data decrypted by the decryption function based on the encryption key and the identifier and the identifier table acquired by the identifier acquisition function,
    A security printing program for causing a computer to realize a printing function of printing print data restored by the restoration function.
  5. In a printing system that performs print processing by transmitting print data from a terminal device to a printing device,
    5. A security printing system, wherein the security printing program according to claim 1, 2, 3, or 4 is stored.
  6. A storage medium storing the security printing program, wherein the security printing program according to claim 1, 2, 3, or 4 is stored.
JP2003044881A 2003-02-21 2003-02-21 Security printing program, security printing system and storage medium storing security printing program Pending JP2004252888A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007148744A (en) * 2005-11-28 2007-06-14 Kyocera Mita Corp Data input/output system, data input device, data output device, data input/output program, and divided control program
JP2007304915A (en) * 2006-05-12 2007-11-22 Kyocera Mita Corp Printing system
JP2008250467A (en) * 2007-03-29 2008-10-16 Brother Ind Ltd Image forming system, data processing apparatus, and image forming apparatus
US8004710B2 (en) 2005-03-03 2011-08-23 Ricoh Company, Ltd. Printing system, printing method and printing program
US8368916B2 (en) * 2005-09-09 2013-02-05 Canon Kabushiki Kaisha Data distribution processing system, data distribution processing method, and program for secure data transfer by splitting data, generating dummy data, and reconstructing data
JP2015045674A (en) * 2013-08-27 2015-03-12 株式会社 日立産業制御ソリューションズ Encryption system, encryption method and computer program
US10582069B2 (en) 2018-03-19 2020-03-03 Ricoh Company, Ltd. Information processing device and device management apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8004710B2 (en) 2005-03-03 2011-08-23 Ricoh Company, Ltd. Printing system, printing method and printing program
US8368916B2 (en) * 2005-09-09 2013-02-05 Canon Kabushiki Kaisha Data distribution processing system, data distribution processing method, and program for secure data transfer by splitting data, generating dummy data, and reconstructing data
JP2007148744A (en) * 2005-11-28 2007-06-14 Kyocera Mita Corp Data input/output system, data input device, data output device, data input/output program, and divided control program
JP2007304915A (en) * 2006-05-12 2007-11-22 Kyocera Mita Corp Printing system
JP2008250467A (en) * 2007-03-29 2008-10-16 Brother Ind Ltd Image forming system, data processing apparatus, and image forming apparatus
JP2015045674A (en) * 2013-08-27 2015-03-12 株式会社 日立産業制御ソリューションズ Encryption system, encryption method and computer program
US10582069B2 (en) 2018-03-19 2020-03-03 Ricoh Company, Ltd. Information processing device and device management apparatus

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