Modern cryptographers depend instead on encrypting the binary representation of a text, using mathematical algorithms that exploit the difficulty of factoring huge numbers. The WWII German Enigma machine was the most famous such machine, and the cracking of its codes played a crucial role in the history of computing. Machines may be devised to generate fresh substitutions for every message, but substitution ciphers still remain vulnerable to the rapid processing power of modern computers, which can try out billions of permutations and exploit unchangeable facts such as the known frequencies of occurrence of the letters (and letter pairs, triples, etc) in texts written in different languages – in English for example, the most common letter will be E. There are endless possibilities for such ciphers, the study of which falls within the discipline of CRYPTOGRAPHY. The simplest ciphers work by substituting one letter for another as prescribed by a list of substitutions called a KEY, possession of which enables the message to be decoded and read.įor example the key could be a table of random number pairs, or an agreed passage from a published book (where consecutive letters of the enciphered message are replaced by those in the equivalent position in the passage). It may have been enciphered, encrypted,or encoded, but it all means the same thing: it doesn’t look like English so no one can use the information unless they have the password to decode it. A scheme for encoding messages to prevent them being read by unauthorized persons. For guidance on citing Cipher Text (giving attribution as required by the CC BY licence), please see below our recommendation of "Cite this Entry".Cipher text is information that has been changed into secret code for security reasons. Please note this CC BY licence applies to some textual content of Cipher Text, and that some images and other textual or non-textual elements may be covered by special copyright arrangements. This entry about Cipher Text has been published under the terms of the Creative Commons Attribution 3.0 (CC BY 3.0) licence, which permits unrestricted use and reproduction, provided the author or authors of the Cipher Text entry and the Lawi platform are in each case credited as the source of the Cipher Text entry. Contact (Association), nounaccord acquaintanceship affiliation alliance bond camaraderie close union cooperation coalition combination commerce communication community companions. Circumspect adjectivealert assiduous astute attending attentive careful cautious cautus chary circumspective cognizant conscientious conscious considerate contemplative.Circuity Of Action A indirect course of legal procedure which necessitates multiple actions to achieve a result which might have been achieved in a single action.Ciphony Ciphony in the National Security Context A definition and brief description of Ciphony in relation to national security is as follows:The scrambling through technology of the spoken word.Translate each number of sum back to alphabet, it gives our cipher text. If sum produced greater than 26, subtract 26 form it. Add each number corresponding to plain text alphabet and key. Cipher Pad Cipher Pad in the National Security Context A definition and brief description of Cipher Pad in relation to national security is as follows:A printed list of cipher keys, each intended. Treat each plain text character as a number in increasing sequence (A0, B1, Z25).Cipher Machine Cipher Machine in the National Security Context A definition and brief description of Cipher Machine in relation to national security is as follows:A mechanical device that assists in the production.Cipher Key Cipher Key in the National Security Context A definition and brief description of Cipher Key in relation to national security is as follows:A sequence of symbols that a user of.Cipher Disk Cipher Disk in the National Security Context A definition and brief description of Cipher Disk in relation to national security is as follows:A handheld coding device for generating a limited.Cipher Cipher in the National Security Context A definition and brief description of Cipher in relation to national security is as follows:A cipher uses a system of fixed rules (an algorithm).CIPA Cipa in the National Security Context A definition and brief description of Cipa in relation to national security is as follows:The Classified Information Act, passed by Congress in 1980.
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