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CrypTool is free software that illustrates cryptographic concepts. It is the most widely used e-learning program in the world in the field of cryptology. More than 60 algorithms are implemented extensively and efficiently, along with a large number of algorithms and analysis tools. The graphical interface and the abundant online information allow the user—even a novice on the Internet—to delve into the mysteries of cryptography. The most classic mechanisms, as well as the RSA asymmetric cryptography, elliptic-curve-based cryptography, digital signatures, or the Diffie-Hellman key exchange protocol, are explained using animations. It also contains a tutorial on primes and elementary number theory.

• Licenses:
  • Apache License 2.0
• Website
• Installation guides:
  • How to install Cryptool
• Tutorials:
  • Cryptool Workshop
• Source code
• Additional links:
  • List of videos about Cryptools (video)
• Available on MyApps URJC
• Last updated: 04/04/2019