| The Official PGP User's Guide by Philip R. Zimmermann MIT Press 1995 ISBN 0-262-74017-6 216 pp. $14.95 |
PGP: Pretty Good Privacy by Simson Garfinkel O'Reilly & Associates 1994 ISBN 1-56592-098-8 430 pp. $24.95 |
| Protect Your Privacy: The PGP User's Guide by William Stallings Prentice Hall PTR 1995 ISBN 0-13-185596-4 302 pp. $19.95 |
Applied Cryptography: Protocols, Algorithms, and Source Code in C 2nd Edition by Bruce Schneier John Wiley & Sons 1996 ISBN 0-471-11709-9 |
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E-Mail Security with PGP and PEM: How to Keep Your Electronic Mail Private by Bruce Schneier John Wiley & Sons 1995 ISBN 0-471-05318-X |
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