The Legacy of DES
"By the mid-1990s, it became widely believed that the NSA was able to break DES by trying every possible key. This ability was demonstrated in 1998, when a $220,000 machine was built that could brute-force a DES key in a few days. In 1985, the academic community proposed a DES variant with the same mathematics but a longer key, called triple-DES. This variant had been used in more secure applications in place of DES for years, but it was time for a new standard. In 1997, NIST solicited an algorithm to replace DES."
(Submitted by Noel Mon Oct 18, 2004 )
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