26.6. Security Reference

• Cheswick, William R. and Steven M. Bellovin. Firewalls and Internet Security: Repelling the Wily Hacker. Reading, Mass. : Addison-Wesley, 1995.
  ISBN 0-201-63357-4
• Garfinkel, Simson and Gene Spafford. Practical UNIX Security. 2nd Ed. O'Reilly & Associates, Inc., 1996.
  ISBN 1-56592-148-8
• Garfinkel, Simson. PGP Pretty Good Privacy O'Reilly & Associates, Inc., 1995.
  ISBN 1-56592-098-8