[8237] in cryptography@c2.net mail archive
Re: migration paradigm (was: Is PGP broken?)
daemon@ATHENA.MIT.EDU (Antonomasia)
Sat Dec 9 16:45:39 2000
Date: Thu, 7 Dec 2000 21:15:20 GMT
From: Antonomasia <ant@notatla.demon.co.uk>
Message-Id: <200012072115.VAA01099@notatla.demon.co.uk>
To: bear@sonic.net, reinhold@world.std.com, rick_smith@securecomputing.com
Cc: cryptography@c2.net, wsimpson@greendragon.com
From: Rick Smith at Secure Computing <rick_smith@securecomputing.com>
> Does anyone have a citation as to the source of this 1.33 bits/letter
> estimate? In other words, who computed it and how? It's in Stinson's crypto
> book, but he didn't identify its source. I remember tripping over a
> citation for it in the past 6 months, but can't find it in my notes.
According to Kahn's "The Codebreakers", 1996, ISBN 0-684-83130-9 pp 759-762
Shannon did frequency counts of 1, 2 and 3 letter n-graphs and asked people
to guess the next letter in incomplete passages of English.
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