Autokey cipher

An autokey cipher is a cipher which incorporates the message (the plaintext) into the key. There are two forms of autokey cipher: key autokey and text autokey ciphers. A key-autokey cipher uses previous members of the keystream to determine the next element in the key stream. A text-autokey uses the previous message text to determine the next element in the keystream.

Related Topics:
Cipher - Plaintext - Key

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In modern cryptography, self-synchronizing stream ciphers are autokey ciphers.

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