ENCRYPTION SYSTEM, ENCRYPTION APPARATUS, DECRYPTION APPARATUS, ENCRYPTING/DECRYPTING METHOD, ENCRYPTING METHOD, AND DECRYPTING METHOD

摘要

PROBLEM TO BE SOLVED: To surely protect digital video data and digital audio data from illegal copy.

SOLUTION: An encryption system 1 comprises an encryption apparatus 10 provided with an A-D conversion means 2, a code setting means 3 for preparing a plurality frame data obtained by collecting unit data in each prescribed number of data and generating a frame check code on the head of each frame data, an encryption means 4 for successively performing the encryption processing for using the encrypted result of preceding unit data for the encryption of the succeeding unit data to prepare chain encryption data, and an interface 5; and a decryption apparatus 20 provided with an interface 6, a transfer start means 7 and a decryption means 8.

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