nihilist cipher
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Nihilist cipher — In the history of cryptography, the Nihilist cipher is a manually operated symmetric encryption cipher originally used by Russian Nihilists in the 1880s to organize terrorism against the czarist regime. The term is sometimes extended to several… … Wikipedia
Nihilist — may refer to: a person who believes human existence has no objective meaning, purpose, or intrinsic value, see nihilism Nihilist movement, a Russian political and cultural movement Nihilist (band), a Swedish death metal band Nihilist, the only… … Wikipedia
VIC cipher — The VIC cipher was a pencil and paper cipher used by the Soviet spy Reino Häyhänen, codenamed VICTOR . FAQ It was arguably the most complex hand operated cipher ever seen, when it was first discovered. The initial analysis done by the NSA in 1953 … Wikipedia
Dorabella Cipher — The text of the Dorabella Cipher, in Elgar s handwriting The Dorabella Cipher is an enciphered letter written by Edward Elgar to Miss Dora Penny, which was accompanied by another dated July 14, 1897. Penny was never able to decipher it and its… … Wikipedia
Substitution cipher — In cryptography, a substitution cipher is a method of encryption by which units of plaintext are replaced with ciphertext according to a regular system; the units may be single letters (the most common), pairs of letters, triplets of letters,… … Wikipedia
Caesar cipher — The action of a Caesar cipher is to replace each plaintext letter with one fixed number of places down the alphabet. This example is with a shift of three, so that a B in the p … Wikipedia
Classical cipher — A cipher is a means of concealing a message, where letters of the message are substituted or transposed for other letters, letter pairs, and sometimes for many letters. In cryptography, a classical cipher is a type of cipher that was used… … Wikipedia
Hill cipher — Hill s cipher machine, from figure 4 of the patent In classical cryptography, the Hill cipher is a polygraphic substitution cipher based on linear algebra. Invented by Lester S. Hill in 1929, it was the first polygraphic cipher in which it was… … Wikipedia
Transposition cipher — In cryptography, a transposition cipher is a method of encryption by which the positions held by units of plaintext (which are commonly characters or groups of characters) are shifted according to a regular system, so that the ciphertext… … Wikipedia
Book cipher — A book cipher is a cipher in which the key is some aspect of a book or other piece of text; books being common and widely available in modern times, users of book ciphers take the position that the details of the key is sufficiently well hidden… … Wikipedia
