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10.   Recommended Reading

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Stallings, William, "Protect Your Privacy: A Guide for PGP Users",
Prentice Hall, 1995, ISBN 0-13-185596-4.
(Current errata at ftp://ftp.shore.net/members/ws/Errata-PGP-mmyy.txt)

Garfinkel, Simson, "PGP: Pretty Good Privacy", O'Reilly & Associates,
1994, ISBN 1-56592-098-8.

Schneier, Bruce, "E-Mail Security with PGP and PEM: How To Keep Your
Electronic Messages Private", John Wiley & Sons, 1995, ISBN
0-471-05318-X.

> The Code Breakers
      The Story of Secret Writing
      By David Kahn
      The MacMillan Publishing Company (1968)
      866 Third Avenue, New York, NY 10022
      Library of Congress Catalog Card Number: 63-16109

    ISBN: 0-02-560460-0

    This has been the unofficial standard reference book on the history of
    cryptography for the last 25 years. It covers the development of
    cryptography from ancient times, up to 1967. It is interesting to read
    about the cat and mouse games that governments have been playing with
    each other even to this day. I have been informed by Mats Lofkvist  that the book has been reissued since its original
    printing.  He found out about it from the 'Baker & Taylor Books'
    database.  I obtained my original edition from a used book store.  It is
    quite exhaustive in its coverage with 1164 pages.  When I was serving in
    the United States Navy in the early 1970's as a cryptographic repair
    technician, this book was considered contraband and not welcome around my
    work place, even though it was freely available at the local public
    library.  This was apparently because it mentioned several of the pieces
    of secret cryptographic equipment that were then in use in the military.

  > The following list was taken from the PGP documentation:

Dorothy Denning, "Cryptography and Data Security", Addison-Wesley,
Reading, MA 1982

Dorothy Denning, "Protecting Public Keys and Signature Keys", IEEE Computer,
Feb 1983

Martin E. Hellman, "The Mathematics of Public-Key Cryptography," Scientific
American, Aug 1979

Steven Levy, "Crypto Rebels", WIRED, May/Jun 1993, page 54. (This is a "must-
read" article on PGP and other related topics.)

Ronald Rivest, "The MD5 Message Digest Algorithm", MIT Laboratory for
Computer Science, 1991.  Available from the net as RFC1321.

Also available at ftp.dsi.unimi.it and its mirror at nic.funet.fi is:
IDEA_chapter.3.ZIP, a postscript text from the IDEA designer about
IDEA.

Xuejia Lai, "On the Design and Security of Block Ciphers", Institute for
Signal and Information Processing, ETH-Zentrum, Zurich, Switzerland, 1992

Xuejia Lai, James L. Massey, Sean Murphy, "Markov Ciphers and Differential
Cryptanalysis", Advances in Cryptology- EUROCRYPT'91

Philip Zimmermann, "A Proposed Standard Format for RSA Cryptosystems",
Advances in Computer Security, Vol III, edited by Rein Turn, Artech House,
1988

Bruce Schneier, "Applied Cryptography: Protocols, Algorithms, and Source Code
in C", John Wiley & Sons, 1993

Paul Wallich, "Electronic Envelopes", Scientific American, Feb 1993, page 30.
(This is an article on PGP)