A reciprocal cipher means, just as one enters the
Examples of reciprocal ciphers are:
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reciprocal alphabet — noun : a substitution alphabet in which cipher and plaintext equivalents are reciprocal (as when Ap=Xc and Xp=Ac) … Useful english dictionary
Vigenère cipher — The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution.The Vigenère (pronEng|ˌviːdʒɪˈnɛəɹ, veedj ih nair )… … Wikipedia
Beaufort cipher — The Beaufort cipher, created by Sir Francis Beaufort, is a substitution cipher that is similar to the Vigenère cipher but uses a slightly modified enciphering mechanism and tableau.Using the cypherTo encrypt (or decrypt for that matter), first… … Wikipedia
Autokey cipher — 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… … Wikipedia
ROT13 — replaces each letter by its partner 13 characters further along the alphabet. For example, HELLO becomes URYYB (or, rev … Wikipedia
Cryptanalysis of the Enigma — enabled the western Allies in World War II to read substantial amounts of secret Morse coded radio communications of the Axis powers that had been enciphered using Enigma machines. This yielded military intelligence which, along with that from… … Wikipedia
Giovan Battista Bellaso — (Brescia 1505–...) was an Italian cryptologist.BiographyBellaso was born of a distinguished family in 1505. His father was Piervincenzo, a patrician of Brescia, owner since the 15th century of a house in town and a suburban estate in Capriano, in … Wikipedia
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Hugh Foss — Hugh Rose Foss (13 May 1902 – 23 December 1971) was a British cryptographer. He was born in Kobe, Japan where his father (Hugh James Foss) was a missionary Bishop, and he learned Japanese. He was educated at Marlborough College and Christ s… … Wikipedia
