Bibliography
- Ross Anderson.
Security Engineering: A Guide to Building Dependable Distributed Systems,
  pages 73–113.
John Wiley & Sons, New York, 2001.
 
- Friedrich L. Bauer.
Decrypted Secrets: Methods and Maxims of Cryptology.
Springer Verlag, 1997.
 
- Tim Bell, Harold
  Thimberly, Mike Fellows, Ian Witten, and Neil Koblitz.
Explaining cryptosystems to the general public.
In Louise Yngström and Simone Fisher-Hübner, editors, WISE 1:
  First World Conference on Information Security Education, pages
  221–233. IFIP TC11 WG 11.8, June 1999.
 
- J. Glenn Brookshear.
Computer Science, pages 485–488.
Addison-Wesley, 8th edition, 2004.
 
- Dorothy Elizabeth Robling
  Denning.
Cryptography and Data Security.
Addison-Wesley, 1983.
 
- Dieter Gollmann.
Computer Security.
John Wiley & Sons, New York, 1999.
 
- David Kahn.
The
  Codebreakers: The Story of Secret Writing.
Scribner, New York, 1996.
 
- Bruce Schneier.
Applied Cryptography.
Wiley, New York, second edition, 1996.