[8229] in cryptography@c2.net mail archive
Re: migration paradigm (was: Is PGP broken?)
daemon@ATHENA.MIT.EDU (Arnold G. Reinhold)
Thu Dec 7 13:44:52 2000
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Date: Wed, 6 Dec 2000 21:03:45 -0500
To: Rick Smith at Secure Computing <rick_smith@securecomputing.com>,
Ray Dillinger <bear@sonic.net>
From: "Arnold G. Reinhold" <reinhold@world.std.com>
Cc: cryptography@c2.net, William Allen Simpson <wsimpson@greendragon.com>
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At 3:43 PM -0600 12/6/2000, Rick Smith at Secure Computing wrote:
>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.
>
Bruce Schneier has two cites in Applied Cryptography 2nd Ed. on p. 234:
Claude E. Shannon, "Prediction and Entropy in Printed English," Bell
System Technology Journal, v.30 n.1, 1951 pp. 50-64.
Thomas Cover and R.M. King, "A Convergent Gambling Estimate of the
Entropy of English." IEEE Trans. on Information Theory, v. IT-24, n.
4, July 1978, pp. 413-421.
Arnold Reinhold
