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...-09-16 |url-status=dead }}</ref> whose weak [[40-bit encryption]] could be broken in a matter of days using a single personal computer. A similar situation o ...ed Kingdom]] withheld export licenses from exporters unless they used weak ciphers or short keys, and generally discouraged practical public cryptography.<ref ...

...Ratcliff: Delusions of Intelligence: Enigma, Ultra, and the End of Secure Ciphers. Oct 2006, p 36</ref><ref>John Ferris: Intelligence and Strategy: Selected ...Ratcliff: Delusions of Intelligence: Enigma, Ultra, and the End of Secure Ciphers. Oct 2006, p. 38-40</ref> ...

...the [[Lorenz cipher|Lorenz SZ]] [[teleprinter]] [[Rotor machine|rotor]] [[stream cipher]] attachments. Decrypts of this traffic became an important source o ...2]] for the air force and the Siemens T43, which was little used and never broken by the Allies.{{sfn|Weierud|2006|p=307}} ...