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
- Website with nearly all in the GDR used codes and encrytion mechanisms -- (only German)
http://scz.bplaced.net - Good reading introductionary paper by Scott Aaronson: "The Prime Facts: From Euclid to AKS"
http://www.scottaaronson.com/writings/prime.pdf - The Prime Pages by Chris Caldwell
http://www.utm.edu/research/primes/ - GIMPS (Great Internet Mersenne-Prime Search)
http://www.mersenne.org/ - Educational project: "Zahlentheorie in der Schule -- Von Primzahlen zur Verschlüsselung mit RSA" -- (German only)
http://www.hydrargyrum.de/kryptographie - The Mathematical Atlas (index using mathematics subject classification), Number Theory
http://www.math.niu.edu/~rusin/known-math/index/11-XX.html - +Plus, an internet magazine produced by the Millennium Mathematics Project at the University of Cambridge
http://plus.maths.org - Randall K. Nichols (Lanaki): "Classical Cryptography Course vol 1+2", 1995
http://www.fortunecity.com/skyscraper/coding/379/lesson1.htm - John Savard: "A Cryptographic Compendium"
This web site features an extensive section concerning cryptography, especially about Rijndael. Website seemingly no longer updated since 1999.
http://www.quadibloc.com/crypto/jscrypt.htm - An Interactive Introduction to Elliptic Curve Cryptography in 6 lessons using the computer algebra system SAGE, by Maike Massierer
http://www.sagenb.org/home/pub/1126/ - Wonderful Cryptography - topics for a motivational 'Introduction to Cryptography', lecture by Eran Tromer
http://www.tromer.org/wondercrypt
Books
- Johannes Buchmann: "Introduction to Cryptography", 2nd ed, 2004, Springer.
- Claudia Eckert: "IT-Sicherheit Konzepte - Verfahren - Protokolle", 7th edition, 2012, Oldenbourg -- (German only)
http://www.oldenbourg-verlag.de/en/wissenschaftsverlag/it-sicherheit/9783486706871 - Bernhard Esslinger et al.: "Kryptologie für Jedermann", SAP pocket seminar produced within the governmental initiative "Deutschland - Sicher im Netz", 2007 -- (German only)
https://www.sicher-im-netz.de/files/images/fibel_kryptologie.pdf - 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
http://www.cacr.math.uwaterloo.ca/hac/index.html - Rolf Oppliger: "Contemporary Cryptography, Second Edition", 2011, Artech House
http://books.esecurity.ch/cryptography2e.html - 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).
http://www.crypto-textbook.com/ - 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
http://shoup.net/ntb/ - William Stallings: "Cryptography and Network Security", 2006, Prentice Hall
http://williamstallings.com/ - 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.
http://cs.sjsu.edu/faculty/stamp/crypto/ - 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
- Cryptography and Security by Ron Rivest (website seemingly no longer updated)
http://theory.lcs.mit.edu/~rivest/crypto-security.html - The PKI page by Stefan Kelm
http://www.pki-page.info/ - Simon Singh's Webpage, author of "The Codebook"
http://www.simonsingh.net/cryptography/
Crypto History
- Links and books see here.
Further Information
- heise Security UK - computer security news, information and services
http://www.heise-security.co.uk/ - German federal ministries page about Internet security -- (German only)
https://www.bsi-fuer-buerger.de - Computer Security Resource Center and AES page at NIST
http://www.nist.gov - Cryptome archives
http://cryptome.org/ - ACA (The American Cryptogram Association) is dedicated to promoting the hobby and art of cryptanalysis. You have to become a member (subscription) to get the 2-monthly issue of "The Cryptogram".
http://www.cryptogram.org/ - Dirk Rijmenants' Cipher Machines and Cryptology
Historical and technical information about WW2 crypto machines and some nice according free software simulators.
http://users.telenet.be/d.rijmenants/index.htm - Geoff's Crypto page
A page under (permanent) construction with WW2 crypto messages and historic cipher machine simulators.
http://www.hut-six.co.uk/ - An interestingly designed program (incl. Java source code), which implemented the classic cipher of the Turning Grille
http://www.turning-grille.com - A web site with many classic ciphers implemented in PHP -- (German only)
http://www.kryptographiespielplatz.de/ - CryptoCrack -- A Windows program for solving a whole bunch of classical ciphers with various options.
https://sites.google.com/site/cryptocrackprogram
Reference to Further Publications about CrypTool
- See "Coverage in Print Media"
- Jamie Kendall (University of Portsmouth): "Cryptographic Techniques for Network Security using CrypTool", April 2008, 91 pages
This project educates students in the basics of the field of classic and modern cryptography and the according cryptanalysis. The project explores the software CrypTool 1 extensively and comprises of a set of three one hour lab sheets as well as an accompanying report with the solutions. - CrypTool 2 at CeBIT 2010
The University of Duisburg-Essen presented CrypTool 2 as e-learning platform, peers@play and the combination of both for distributed modern cryptanalysis. - 15th Colloquium for infomation Systems Security Education Fairborn, Rong Yang, Layne Wallace and Ian Burchett: Teaching Cryptology At All Levels Using CrypTool, June 2011
[Abstract - This paper introduces cryptology in the framework of general cybersecurity and advocates that it is an appropriate mechanism for introducing security issues into the classroom at all level of the curriculum. A practical free software package called CrypTool which can be a major asset in any attempt to teach cryptology to a range of student audiences is presented. Applications and classroom experiences using CrypTool are discussed along with some student feedback.]
Coverage in Online Media
- Telepolis, Werkzeugkasten für Codeknacker, August 2008 (German)
- University award of Koblenz
Teaching post student won University award of Koblenz with his work about CrypTool 2. - http://en.wikipedia.org/wiki/CrypTool

