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A History Of The Cryptanalysis (Codebreaking) Of World War I And World War II, With Exclusive Interviews And Explanations By Those Involved And The People Who Knew And Worked With Them, Including David Kahn, Herbert Yardley, John Friedman, Frank Rowlett, Roger Pinneau (Roger Pineau), Arthur Levenson, David Balme, Ronnie Hulick And More - Plus The First Opening In 50 Years Of A Secret Crate Of The Purple Analog Cryptanalysis Device, Opened Especially For This Documentary - All Presented In The Highest DVD Quality MPG Video Format Of 9.1 MBPS As An Archival Quality All Regions Format DVD, MP4 Video Download Or USB Flash Drive! (Color, 1994, 58 Minutes.) #Cryptanalysis #Codebreaking #Cryptology #Codes #Cyphers #ZimmermannTelegram #Room40 #HerbertYardley #EnigmaCode #UltraSecret #BletchleyPark #EnigmaMachine #AttackOnPearlHarbor #PearlHarborAttack #BattleOfPearlHarbor #BattleOfTheCoralSea #BattleOfMidway #WorldWarI #WorldWarOne #WorldWar1 #WWI #WW1 #FirstWorldWar #FirstEuropeanWar #WorldWarII #WorldWarTwo #WorldWar2 #WWII #WW2 #SecondWorldWar #SecondEuropeanWar #EuropeanCivilWar #DVD #VideoDownload #MP4 #USBFlashDrive
Cryptanalysis (from the Greek kryptos, "hidden", and analyein, "to analyze") is the study of analyzing information systems in order to study the hidden aspects of the systems. Cryptanalysis is used to breach cryptographic security systems and gain access to the contents of encrypted messages, even if the cryptographic key is unknown. In addition to mathematical analysis of cryptographic algorithms, cryptanalysis includes the study of side-channel attacks that do not target weaknesses in the cryptographic algorithms themselves, but instead exploit weaknesses in their implementation. Even though the goal has been the same, the methods and techniques of cryptanalysis have changed drastically through the history of cryptography, adapting to increasing cryptographic complexity, ranging from the pen-and-paper methods of the past, through machines like the British Bombes and Colossus computers at Bletchley Park in World War II, to the mathematically advanced computerized schemes of the present. Methods for breaking modern cryptosystems often involve solving carefully constructed problems in pure mathematics.
In World War I, the breaking of the Zimmermann Telegram was instrumental in bringing the United States into the war. In World War II, the Allies benefitted enormously from their joint success cryptanalysis of the German ciphers - including the Enigma machine and the Lorenz cipher - and Japanese ciphers, particularly 'Purple' and JN-25. 'Ultra' intelligence has been credited with everything between shortening the end of the European war by up to two years, to determining the eventual result. The war in the Pacific was similarly helped by 'Magic' intelligence. Cryptanalysis of enemy messages played a significant part in the Allied victory in World War II. F. W. Winterbotham, quoted the western Supreme Allied Commander, Dwight D. Eisenhower, at the war's end as describing Ultra intelligence as having been "decisive" to Allied victory. Sir Harry Hinsley, official historian of British Intelligence in World War II, made a similar assessment about Ultra, saying that it shortened the war "by not less than two years and probably by four years"; moreover, he said that in the absence of Ultra, it is uncertain how the war would have ended.