Bacon biliteral cipher

noun

"-

: a cipher that hides a message in a cover text by representing the letters of the plaintext by different combinations of two letter forms (such as italic and roman) in each sequence of five letters of the cover text (as when "Springfield, Mass" hides the word CAB by the code xxxxx=A, xxxxx=B, xxxxx=C)

Word History

Etymology

after Francis Bacon, who proposed it

First Known Use

1935, in the meaning defined above

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