enciphered code
41Tableau de Concordance — The Tableau de Concordance was the main French diplomatic code used during World War I; the term also refers to any message sent using the code. It was a superenciphered four digit code that was changed three times between 1 August 1914 and 15… …
42intelligence — /in tel i jeuhns/, n. 1. capacity for learning, reasoning, understanding, and similar forms of mental activity; aptitude in grasping truths, relationships, facts, meanings, etc. 2. manifestation of a high mental capacity: He writes with… …
43Distributed firewall — A firewall is system or group of system (router, proxy, or gateway) that implements a set of security rules to enforce access control between two networks to protect inside network from outside network. It may be a hardware device or a software… …
44ROT13 — replaces each letter by its partner 13 characters further along the alphabet. For example, HELLO becomes URYYB (or, rev …
45Punched tape — Five hole and eight hole punched paper tape Punched tape or paper tape is an obsolete form of data storage, consisting of a long strip of paper in which holes are punched to store data. It was widely used during much of the twentieth century for… …
46Index of coincidence — In cryptography, coincidence counting is the technique (invented by William F. Friedman[1]) of putting two texts side by side and counting the number of times that identical letters appear in the same position in both texts. This count, either as …
47Meredith Gardner — This article is about the codebreaker. For the freestyle skier, see Meredith Ann Gardner. Meredith Knox Gardner Born October 20, 1912 Okolona, Mississippi Died August 9, 2002 Chevy Chase, Maryland Residence Washington, D.C …
48Operation Ruthless — was the name of a deception operation devised by Ian Fleming in the British Admiralty during World War II, in an attempt to gain access to German Naval Enigma codebooks. Contents 1 Background 2 The plan 3 Outcome …
49Herbert Yardley — Infobox Scientist name = Herbert Yardley box width = image width = 150px caption = Herbert O. Yardley birth date = 13 April 1889 birth place = Worthington, Indiana death date = 7 August 1958 death place = residence = citizenship = nationality =… …
50SIGSALY — 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 …
