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ENCRYPTION/DECRYPTION SYSTEM and its control method

A control method, decrypted technology, applied in transmission system, digital transmission system, internal/peripheral computer component protection, etc.

Active Publication Date: 2015-09-09
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the initial input value in the register is set in clear text, so in the event that the initial input value is stolen, the encryption key is reproduced, which results in the encrypted data being easily decrypted

Method used

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  • ENCRYPTION/DECRYPTION SYSTEM and its control method
  • ENCRYPTION/DECRYPTION SYSTEM and its control method
  • ENCRYPTION/DECRYPTION SYSTEM and its control method

Examples

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Embodiment Construction

[0024] The present invention will now be described with reference to the accompanying drawings showing embodiments of the invention.

[0025] figure 1 is a block diagram schematically showing the configuration of an image forming system having an encryption processing device according to an embodiment of the present invention.

[0026] figure 1 The image forming system in has a host controller 101 and a host computer 907 connected to each other via a network 906 . The host controller 101 includes a CPU 901, a memory control unit 902, a LAN-IF unit 905, a reader IF unit 908, a FAX-IF unit 910, an image processing unit 912, a panel IF unit 913, an HDD-IF unit 915, and a video IF unit 916 , and these units are connected to each other via a bus 918 .

[0027] The host controller 101 also has a ROM 903 and a RAM 904 , both of which are connected to the memory control unit 902 . A network 906, a scanner device 909, a FAX (facsimile) device 911, a panel device 914, an encryption ...

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Abstract

An encryption / decryption system which is capable of preventing encrypted data from being easily decrypted. A program for carrying out an encryption process or a decryption process on data sent and received to and from a host apparatus is stored in encrypted form. A key for decrypting the stored program is generated in response to startup of the encryption / decryption system. The stored program is decrypted using the generated key, and the decrypted program is executed.

Description

technical field [0001] The invention relates to an encryption / decryption system, its control method and storage medium. Background technique [0002] Traditional printing devices have encryption and decryption functions for increased security. With the encryption function, data stored in a storage device such as an HDD possessed by the printing apparatus is encrypted, and with the decryption function, the encrypted data is decrypted using a so-called encryption key. [0003] Among the governments of some countries including Japan and the United States, and security-conscious companies, the above-mentioned printing equipment is required to be obtained from a third-party organization based on the "Japan Cryptographic Module Validation Program" which is one of the product certification systems. To obtain the certification, specifically, the above-mentioned printing equipment is required to have the certification of security level 2 or higher stipulated in the certification pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/44H04N1/23
CPCG06F21/725H04L9/0861G06F21/72G06F21/602
Inventor 松本昭浩
Owner CANON KK
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