[2048] in Info-AFS_Redistribution
Re: cracking DES encryption
daemon@ATHENA.MIT.EDU (Richard Campbell)
Tue Sep 28 19:52:39 1993
From: ric@morgan.com (Richard Campbell)
Date: Tue, 28 Sep 1993 18:07:15 -0400
In-Reply-To: Bob Oesterlin <oester+@rchland.ibm.com>
To: info-afs@transarc.com
> Michael Weiner presented a paper at Crypto93 that describes a fast DES key
> search engine that uses a special inside-out DES chip that he designed.
...
> This machine can exhaust the DES key space in 7 hours, finding a key in 3.5
> hours on the average.
While the economics of this machine are impressive, Weiner notes in the same
paper that a two-key triple-DES (essentially, chaining two DES encryptions
together) is estimated to be about 10 trillion times stronger than single-DES.
His $1 million dollar machine would take about four billion years to
crack that, on average.
And a three-key triple-DES is apparently even stronger than that.
