We are a scientific project started in 1998 to educate about cryptology and make it easily accessible.
We offer cryptological knowledge and tools to self-educate, to teach, and to try out cryptography and cryptanalysis.
💾 Download one of our 3 offline programs: 
📱 Use our interactive browser version: 
📖 Read our book on cryptography: CrypTool Book
We have further organizations on GitHub. Have a look at:
