cryptanalysis

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cryptanalysis

[‚krip·tə′nal·ə·səs]
(communications)
Steps and operations performed in converting encrypted messages into plain text without previous knowledge of the key employed.

cryptanalysis

The branch of cryptography concerned with decoding encrypted messages when you're not supposed to be able to.

cryptanalysis

The art of recovering original data (the plaintext) that has been encrypted (turned into ciphertext) without having access to the correct key used in the encryption process. When new encryption algorithms are introduced, cryptanalysis determines how hard it is to break the code. See encryption.
References in periodicals archive ?
Turing's relationship with John Cairncross (Allen Leech), a Soviet spy hiding as a cryptanalyst at Bletchley, makes this abundantly obvious.
Safford had tapped Rochefort to head up the efforts in breaking JN-25, giving him a "blank check" to acquire the best cryptanalysts in the Navy.
Crosby and other cryptanalysts in [7] were able to explain the version of HDCP that apprehended the cryptographic portions of HDCP, in that the Key Selection Vector (KSV) is assigned to a public vector [v.sub.A] E[(Z/[2.sup.56] Z).sup.40] and a private vector, [u.sub.A] E[(Z/[2.sup.56] Z).sup.40].
American cryptanalysts had also broken the two principal codes used by the Japanese Foreign Office for consular communications; these two codes were also used by the Japanese Navy to send directions to and receive information from their resident spy in Honolulu, Takeo Yoshikawa (1914-1993), a junior naval officer masquerading as a consular agent.
The book trace Rochefort's life from a childhood of an iterant Irishman to the pinnacle of a career as a cryptanalyst providing ADM Nimitz with the vital information that allowed him to place his limited resources advantageously to counter the Japanese attempt to take Midway.
Using cryptography for data security is adopted in many of the existing systems but they use only a single algorithm for encryption and decryption, which are vulnerable to attacks by cryptanalysts and are broken at some instance by one of the various cryptanalysis techniques such as linear cryptanalysis, n-gram analysis, meet in the middle attack, brute force attack, etc., Even the most famous and complex algorithm were broken by the cryptanalyst some time after using it widely in the network(Sairam et al., 2011).
The cryptanalysts' successes have since been widely recognized as helping hasten Allied victory and include uncovering evidence of Hitler's plans to invade Russia.
What made Noah's code even more difficult to decipher was that he added elements to throw off would-be cryptanalysts. Writing "J" instead of "K," including words and phrases in his own personal rendition of the French language, writing upside-down, not using spaces, and inserting random stick figures and symbols were all clever ploys Noah used to keep "Official Busybodies" out of his personal business.
Reading a book on the British use of deception in World Wars I and II, it struck me that the British expertise in camouflage came from its schools of design and arts, and that the top cryptanalysts that they fielded and who made a key contribution in winning the war came from Cambridge and Oxford.
Looking back on this episode, it occurs to me that the fact that some of the folks at this table were professional cryptanalysts should have made me a bit hesitant about drawing conclusions.
Exchange programs for Nazi Beobachtungsdienst code breakers to tutor our combat cryptanalysts?
Further coordination among cryptanalysts and all-source intelligence teams allowed them to predict when and where the Japanese strike force would appear.