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INDIVIDUAL DECRYPTION KEY GENERATING APPARATUS, INDIVIDUAL DECRYPTION KEY GENERATION METHOD, PROGRAM FOR THE INDIVIDUAL DECRYPTION KEY GENERATING APPARATUS, ELECTRONIC DATA DECRYPTION APPARATUS, PROGRAM FOR THE ELECTRONIC DATA DECRYPTION APPARATUS, ELECTRONIC DATA ENCRYPTION/DECRYPTION SYSTEM, AND ELECTRONIC DATA ENCRYPTION SYSTEM
INDIVIDUAL DECRYPTION KEY GENERATING APPARATUS, INDIVIDUAL DECRYPTION KEY GENERATION METHOD, PROGRAM FOR THE INDIVIDUAL DECRYPTION KEY GENERATING APPARATUS, ELECTRONIC DATA DECRYPTION APPARATUS, PROGRAM FOR THE ELECTRONIC DATA DECRYPTION APPARATUS, ELECTRONIC DATA ENCRYPTION/DECRYPTION SYSTEM, AND ELECTRONIC DATA ENCRYPTION SYSTEM
PROBLEM TO BE SOLVED: To provide a technology related to the encryption/decryption of electronic data with the same encrypted image data can be decrypted by different distribution decryption keys.;SOLUTION: The different individual decryption keys, capable of decrypting one and same encrypted document, can be produced by providing different identification information items to an ordinary decryption key. Even a coupling means, provided to an individual decryption key generating apparatus 110, couples a decryption key and the identification information items to each other, in a separable way and produces the individual decryption keys. The individual decryption keys differ from each other, whenever the coupled identification information differs. An electronic data decryption apparatus 120 extracts a decryption key from the individual decryption keys so as to decrypt the electronic data of the encrypted document by using this decryption key.;COPYRIGHT: (C)2008,JPO&INPIT
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