[rc5] Enigma and Purple (was Re: One Time Pad)
gindrup at okway.okstate.edu
Tue Oct 28 17:36:56 EST 1997
Late in the war, one of the modified 6-rotor U-boat Enigmas was
intercepted allowing subsequent decoding of the U-boat command
messages. This was (almost) unnecessary at that point given the state
of the War. It is likely though that intercepting U-boat distribution
messages helped accelerate the movement of tropps across the Atlantic
in order to start the Normandy invasion...
ANYWAY... The bulk of the cracking was brute-force against a
"simple" key-based substitution cipher in "pidgin German". Some of it
was automated (hey look, this substitution set doesn't have any spaces
in it -- I guess we don't need to report it to an operator) but the
cracking effort employed many (mostly English women) in the
operations. There was a similar facility in the U.S. with similar
-- Eric Gindrup ! gindrup at okway.okstate.edu
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Subject: Re: [rc5] Enigma and Purple (was Re: One Time Pad)
Author: <rc5 at llamas.net > at SMTP
Date: 1997/10/28 15:30
On Tue, 28 Oct 1997, Skip Huffman wrote:
> Enigma was cracked the old fashioned way. Heavy analysis. Get lots of
> samples, a bunch of really smart mathemeticians, a long table, a BIG
> pot of coffee and get to work.
I thought it was cracked the REAL old fashioned way: They stole one from
a captured U-boat...
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