From: JonWienke@aol.com
Date: Sat, 13 Apr 1996 05:18:39 +0800
To: cypherpunks@toad.com
Subject: Entropy Estimator
Message-ID: <960412001922_511825948@mail02.mail.aol.com>
MIME-Version: 1.0
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I just added a feature to my entropy graphing program that estimates the
number of bits of entropy in the file, in addition to making the graph.  I
tested it on some ZIP files, comparing the sum of the results obtained from
each file individually to the results from the ZIP file containing all of
them.  So far, the results have been consistent within 20%.  EXE's show 3-4
entropy bits/byte, ZIP files show 6-7, and DLL's and text files show 1-2.
 Source code (Visual Basic) available to anyone who wants it, but I think I
will hold off on the EXE and VBX's until I find someone who will put it on
their FTP/WEB site.  Suggestions via email regarding this would be
appreciated.

Jonathan Wienke