corresponding+cipher
61Permutation — For other uses, see Permutation (disambiguation). The 6 permutations of 3 balls In mathematics, the notion of permutation is used with several slightly different meanings, all related to the act of permuting (rearranging) objects or values.… …
62United Kingdom — a kingdom in NW Europe, consisting of Great Britain and Northern Ireland: formerly comprising Great Britain and Ireland 1801 1922. 58,610,182; 94,242 sq. mi. (244,100 sq. km). Cap.: London. Abbr.: U.K. Official name, United Kingdom of Great… …
63Arabic language — Arabic redirects here. For other uses, see Arabic (disambiguation). For the literary standard, see Modern Standard Arabic. For vernaculars, see varieties of Arabic. For others, see Arabic languages. Arabic العربية/عربي/عربى al ʿarabiyyah/ʿarabī …
64Commander Keen — 5 title screen Developer(s) id Software (DOS) David A. Palmer Productions (GBC …
65Linear feedback shift register — [ xor gate provides feedback to the register that shifts bits from left to right. The maximal sequence consists of every possible state except the 0000 state.] A linear feedback shift register (LFSR) is a shift register whose input bit is a… …
66SIGABA — In the history of cryptography, the ECM Mark II was a rotor machine used by the United States from World War II (WWII) until the 1950s. The machine was also known as the SIGABA or Converter M 134 by the Army, or CSP 888/889 by the Navy, and a… …
67Substitution box — In cryptography, a substitution box (or S box) is a basic component of symmetric key algorithms. In block ciphers, they are typically used to obscure the relationship between the plaintext and the ciphertext mdash; Shannon s property of confusion …
68SIGSALY — exhibit at the National Cryptologic Museum In cryptography, SIGSALY (also known as the X System, Project X, Ciphony I, and the Green Hornet) was a secure speech system used in World War II for the highest level Allied communications. It pioneered …
69Pseudorandom generator — In theoretical computer science, a pseudorandom generator is a deterministic method of generating a large amount of pseudorandom, or apparently random, data, from a small amount of initial random data. The initial data is commonly known as a… …
70John Herivel — John W. Herivel (born 1918) is a British science historian and former World War II codebreaker at Bletchley Park.As a codebreaker, Herivel is remembered chiefly for the discovery of what was soon dubbed the Herivel tip or Herivelismus. The tip… …
