Small size product cipher apparatus

Details Small size product cipher apparatus Small size product cipher apparatus

H - Electricity

04

L

H04L 9/28 (2006.01) H04L 9/06 (2006.01)

Patent

CA 2165905

In a product cipher apparatus, a permutation is performed upon plaintext or ciphertext to generate a first message. At least two successive substitutions are performed upon the first message to generate a second message, and the same permutation is performed upon the second message to generate a third message. The successive substitutions and the permutation are repetitively performed upon the third message to obtain ciphertext or plaintext.

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