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| | Cryptanalysis - Wikipedia, the free encyclopedia |
 | | Kahn may have been premature in his cryptanalysis postmortem; weak ciphers are not yet extinct. |
 | | In academia, new designs are regularly presented, and are also frequently broken: the 1984 block cipher Madryga was found to be susceptible to ciphertext-only attacks in 1998; FEAL-4, proposed as a replacement for the DES standard encryption algorithm, was demolished by a spate of attacks from the academic community, many of which are entirely practical. |
 | | In industry, too, ciphers are not free from flaws: for example, the A5/1, A5/2 and CMEA algorithms, used in mobile phone technology, can all be broken in hours, minutes or even in real-time using widely-available computing equipment. |
| en.wikipedia.org /wiki/Cryptanalysis (2523 words) |
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