Re: Why crack more than 40bit RC5 keys? (WAS RE: RC5, hiding

Ilya Haykinson (haykinso@ucla.edu)
Sun, 11 May 1997 16:36:58 -0700


At 07:12 PM 5/11/97 -0400, Nelson Minar wrote:
>Isn't anyone else worried that the news story is going to read
> "DES Secure - takes 10,000 computers six months to break one key"

Not really. Because if anyone seriously wanted to break DES, then, they'd
spend $2000 per computer, buy 60,000 of them (or appropriate numbers of
eight-processor machines), and crack the key in a month. Plus, no one said
that you'd only be looking for one key in a real life situation.
$120,000,000 isn't too expensive for organized crime, or a small country.
The point is, if technology continues to follow Moore's Law, in 18 months
it would only take three months to accomplish the same result. And in three
years, only 6 weeks. The point is that 56-bit encryption is not a good
solution for the future. Something like 1024-bit definitely is.

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May the brute force be with you
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-Ilya Haykinson
Computer Science Undergraduate Association
Crack DES Now! http://www.csua.ucla.edu/deschall/