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.

What is CrypTool 1

CrypTool 1 (CT1) is an open-source Windows program for cryptography and cryptanalysis. It’s the most wide-spreaded e-learning software of its kind.

What is CrypTool 2?

CrypTool 2 (CT2) is an open-source program offering an innovative visual programming GUI to experiment with cryptographic procedures and to animate their cascades.

What is JCrypTool?

JCrypTool (JCT) is an open-source e-learning platform, allowing to experiment comprehensively with cryptography on Linux, MAC OS X, and Windows.

What is CrypTool-Online?

CrypTool-Online (CTO) runs in a browser and provides a huge variety of encryption methods and analysis tools including many illustrated examples.

What is MysteryTwister C3?

MysteryTwister C3 (MTC3) is an international Crypto Cipher Contest offering a broad variety of challenges, a moderated forum and an ongoing hall-of-fame.

Humanity has concerned itself with the topic of cryptology for three thousand years. However, until the mid-20th century it was a topic of importance to only a small interested group -- diplomats and the armed forces. In any military conflict, exchange of confidential information and eavesdropping is crucial for survival. Due to the sensitive subject matter the vast majority of crypto research was done in secrecy in the past.

When we talk about awareness, or security awareness, we usually mean the consciousness for general concerns of information security. Hence, awareness is not only about cryptology, e.g. the encryption of confidential data, but also about a much broader topic. The following figure aims to illustrate this fact:

cryptology en1

This event for teachers and students was held for the first time in 2009. The goal is to teach students, with the help of the freely available CrypTool software, about encoded messages and the importance of cryptography in the modern digital world. See http://www.cryptool.org/schuelerkrypto (German only)
For teachers who want to introduce their pupils into the fascinating world of cryptography the CrypTool project started the Cryptoportal for teachers (only german). On this portal teachers could exchange learning material and have a discussion about it.
  • Germany — Land of Ideas 2008
  • European Information Security Award 2004
  • IT Security Award NRW 2004
  • TeleTrusT Special Award 2004

The remarks in brackets above are taken from the article summary or they describe the link to CrypTool.

For further information see "Links / Books".

This overview of the various cryptographic algorithms is a chronological history of cryptology, whose origins date back to the days of antiquity and which over time has undergone steady refinement of its methods. Please note that this table is by no means complete.

The first human writing dates back more than 6000 years. Encryption has been in existence for around 3000 years.

c. 1900 BC Non standard symbols were used in old Egypt.
c. 1500 BC The Phoenicians developed an alphabet.
c. 1000 BC Non standard symbols were used in old Mesopotamia.
c. 600 BC In Palestine texts have been encrypted with the simple monoalphabetic substitution cipher Atbash.

  • Friedrich L. Bauer: "Decrypted Secrets: Methods and Maxims of Cryptology", 1st edition, 1997, Springer, ISBN-13: 978-3540604181
  • Bengt Beckman: "Codebreakers: Arne Beurling and the Swedish Crypto Program During World War II", 2002, AMS, ISBN 0-8218-2889-4
    Translated from the Swedish by Kjell-Ove Widman
    Review by F.L. Bauer: http://www.ams.org/notices/200308/rev-bauer.pdf

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