ENCRYPTION/DECRYPTION SYSTEM and its control method

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...

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