The application CrypTool is a free e-learning application for Windows. You can use it to apply and analyze cryptographic algorithms. The current version of CrypTool is used all over the world. It supports both contemporary teaching methods at schools and universities as well as awareness training for employees.

The current version offers beside others the following highlights:
Numerous classic and modern cryptographic algorithms (encryption and decryption, key generation, secure passwords, authentication, secure protocols, ...)
Visualisation of several methods (e.g. Caesar, Enigma, RSA, Diffie-Hellman, digital signatures, AES)
Cryptanalysis of certain algorithms (e.g. Vigen

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