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Secret Service code name. President John F. Kennedy, codename "Lancer" with First Lady Jacqueline Kennedy, codename "Lace". The United States Secret Service uses code names for U.S. presidents, first ladies, and other prominent persons and locations. [1] The use of such names was originally for security purposes and dates to a time when ...
This is a list of placeholder names (words that can refer to things, persons, places, numbers and other concepts whose names are temporarily forgotten, irrelevant, unknown or being deliberately withheld in the context in which they are being discussed) in various languages.
The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid. The example key shows one way the letters can be assigned to the grid.
A code name, codename, call sign or cryptonym is a code word or name used, sometimes clandestinely, to refer to another name, word, project, or person. Code names are often used for military purposes, or in espionage. They may also be used in industrial counter-espionage to protect secret projects and the like from business rivals, or to give ...
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A list of several such code words can be seen at Byeman Control System. Exercise terms – a combination of two words, normally unclassified, used exclusively to designate an exercise or test [1] In 1975, the Joint Chiefs of Staff introduced the Code Word, Nickname, and Exercise Term System (NICKA) which automated the assignment of names.
Igen — Uhu Linux 2.0. IIb — Apple IIc (book-sized) IIp — Apple IIc (portable) Ikki — Apple Macintosh II. Indigo — Microsoft .NET communication technologies. Indium — Lunar Linux 1.5.0. Infinite Improbability Drive — TransGaming WineX 3.3. Instatower — Apple Macintosh Performa 6400. Interface Manager — Windows 1.0.
In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet .