The Beale cipher is a form of book cipher where a key document, such as an existing book, is used to encode a message. Each word or phrase in the message is converted into a number that corresponds to a page, line, and word in the key document. The recipient can then use the key to decode the message by looking up the corresponding words.

Cipher is a character in the X-Men comic books. She is a mutant whose given name is Alisa Tager. Her mutant abilities include stealth, phasing, and invisibility.

The BAUDOT code is made from a cipher. The cipher that does this is also known as a Bacon cipher.

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Cipher Complex happened in 360.