Weakest link” is size of key Attacks take advantage of encryption speed 1993: Weiner: $1M machine, 3.5 hours 1998: EFF’s Deep Crack: $250,000 92 billion keys per second 4 days on average 1999: distributed.net: 23 hours OK for some things (e.g., short time horizon) DES sliDES into wiDESpread DESuetude

week3-notes.ppt

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