Abstract
In a simple cypher, each letter in the ‘plaintext’ is altered to another so that, for example, DOG may become CAT and GOD will become TAC. Such cyphers are easy to break if there is enough material, by trying to find frequently occurring letters such as E T A O N I R S H and common words like THE and AND.
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© 1981 John Race
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Race, J. (1981). Playfair. In: The Alien, Numbereater and other Programs for Personal Computers. Palgrave, London. https://doi.org/10.1007/978-1-349-05175-5_11
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DOI: https://doi.org/10.1007/978-1-349-05175-5_11
Publisher Name: Palgrave, London
Print ISBN: 978-0-333-28079-9
Online ISBN: 978-1-349-05175-5
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