Russian copulation

Cryptographic method

In cryptography, Russian copulation is a method of rearranging plaintext before encryption so as to conceal stereotyped headers, salutations, introductions, endings, signatures, etc. This obscures clues for a cryptanalyst, and can be used to increase cryptanalytic difficulty in naive cryptographic schemes. This is of course desirable for those sending messages and wishing them to remain confidential. Padding is another technique for obscuring such clues.

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