An autokey cipher (also known as the autoclave 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 keystream. A text-autokey uses the previous message text to determine the next element in the keystream.
In modern cryptography, self-synchronizing stream ciphers are autokey ciphers.
Other articles related to "autokey cipher, autokey ciphers, ciphers":
... Modern autokey ciphers use very different encryption methods, but they follow the same approach of using either key bytes or plaintext bytes to generate more key bytes ... Most modern stream ciphers are based on pseudorandom number generators the key is used to initialize the generator, and either key bytes or plaintext ... Some stream ciphers are said to be "self-synchronizing", because the next key byte usually depends only on the previous N bytes of the message ...
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“It is not an arbitrary decree of God, but in the nature of man, that a veil shuts down on the facts of to-morrow; for the soul will not have us read any other cipher than that of cause and effect. By this veil, which curtains events, it instructs the children of men to live in to-day.”
—Ralph Waldo Emerson (18031882)