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Did you know?

That CrypTool was originally designed as an internal business application for information security training. CrypTool has since developed into an important open-source project in the field of cryptology. Over 50 volunteer developers worldwide contribute to the program.

Links / Books


This list contains only a small selection of sites about cryptography within the Internet. Further links are contained within the online help of CrypTool and within the script delivered with CrypTool. We appreciate your advice on further interesting links.

Primes, Number Theory and Cryptology (Links and Books)


Web sites


  • Johannes Buchmann: "Introduction to Cryptography", 2nd ed, 2004, Springer.
  • Claudia Eckert: "IT-Sicherheit Konzepte - Verfahren - Protokolle", 7th edition, 2012, Oldenbourg -- (German only)
  • Bernhard Esslinger et al.: "Kryptologie für Jedermann", SAP pocket seminar produced within the governmental initiative "Deutschland - Sicher im Netz", 2007 -- (German only)
  • Keith M. Martin: "Everyday Cryptography -- Fundamental Principles and Applications", March 2012, Oxford University Press
  • Alfred J. Menezes, Paul C. van Oorschot and Scott A. Vanstone: "Handbook of Applied Cryptography", 1997, CRC Press
  • Rolf Oppliger: "Contemporary Cryptography, Second Edition", 2011, Artech House
  • Christof Paar and Jan Pelzl: "Understanding Cryptography – A Textbook for Students and Practioners", December 2009, Springer
    This is pedagogically one of the best crypto books currently available. It describes all crypto schemes of practical relevance while avoiding to be shallow. The companion website has extensive PowerPoint slides for teachers, links to further information and videos of 28 lecturers (in German only).
  • Klaus Schmeh: "Kryptografie – Verfahren, Protokolle, Infrastrukturen", 5th edition, 2013, dpunkt -- (German only).
    This is a comprehensive and easy to read book.
  • Klaus Schmeh: "Codeknacker gegen Codemacher. Die faszinierende Geschichte der Verschlüsselung", 2nd edition, 2007, W3L -- (German only)
    This is most current among the books dealing in a comprehensive manner with the history of cryptology. It contains a small collection of solved and unsolved crypto riddles.
  • Victor Shoup: "A Computational Introduction to Number Theory and Algebra", 2005, Cambridge University Press
  • William Stallings: "Cryptography and Network Security", 2006, Prentice Hall
  • Mark Stamp and Richard M. Low: "Applied Cryptanalysis: Breaking Ciphers in the Real World", 2007, Wiley-Interscience
    The according website has a lot of powerpoint slides and challenge problems.
  • Mark Stamp: "Information Security: Principles and Practice", 2nd edition, 2011, Wiley
    It is a comprehensive book divided into four main themes Cryptography, Access Control, Protocols, and Software. Throughout the book the author included frequent "humorous" footnotes. The according website offers a wealth of additional, free material: http://www.cs.sjsu.edu/~stamp/infosec

Comprehensive Link Lists

Crypto History

  • Links and books see here.

Further Information

Reference to Further Publications about CrypTool

Coverage in Online Media

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