[118371] in Cypherpunks
Re: more re Encryption Technology Limits Eased
daemon@ATHENA.MIT.EDU (Jim Gillogly)
Sun Sep 26 06:22:48 1999
Message-ID: <37EDEF24.F7A11C41@acm.org>
Date: Sun, 26 Sep 1999 10:02:12 +0000
From: Jim Gillogly <jim@acm.org>
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Reply-To: Jim Gillogly <jim@acm.org>
At 11:49 PM +0000 9/16/99, Sandy Harris wrote:
>>Another way to look at it: http://www.planepage.com/ gives the cost of a B1
>>bomber as $200 million. With that budget and Deep Crack technology, they
>>break
>>56-bit DES in under 10 minutes, and a 64-bit cipher in well under two days.
>>
>>Of course they likely have better technology and can spend the price of an
>>aircraft carrier, not just one plane.
Kevin Elliott writes:
>Just for comparison purposes where does that put a 128-bit key?
It's simple math: 2 days * 2^64. Or if you want the solution in under
two days, it parallelizes nicely and you can do it for $200M * 2^64.
For a student exercise, you might calculate how this compares with
the estimated amount of gold in the galaxy; or how 2^65 days compares
with the expected lifetime of the universe.
--
Jim Gillogly
Hevensday, 5 Winterfilth S.R. 1999, 09:56
12.19.6.10.3, 3 Akbal 11 Chen, Fifth Lord of Night
