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The CrypTool Portal

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The CrypTool Portal raises awareness and interest in cryptography for everyone.
All learning programs in the CrypTool project are open source and available for free. The CrypTool project develops the world most-widespread free e-learning programs in the area of cryptography and cryptoanalysis.

The CrypTool Portal consists of e-learning software (CT1, CT2, JCT, CTO) and an additional website:

E-Learning Software:

  • CrypTool 1 (CT1) was the first version of CrypTool. It was released in 1998 and allows to experiment with different cryptographic algorithms. CT 1 has two successors.
  • CrypTool 2 (CT2) supports visual programming and execution of cascades of cryptographic procedures.
  • JCrypTool (JCT) which is platform-independent.
  • CrypTool-Online (CTO) was released in spring 2009. This tool allows to try out different algorithms in a browser / smartphone.

Additional website
Volunteers, especially programmers and students planning to write their thesis in the area of cryptography, are always welcome to join in the further development of the CrypTool project.
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