How to Break an Unknown Cipher

#cryptology, #cryptography, #cryptanalysis In this video, we show how you can analyze and break a ciphertext, which was encrypted with an unknown type of cipher. Clearly, we use CrypTool 2 for that :-) We show, how a cryptanalyst would analyze the cipher by: 1) Creating a transcription 2) Analyzing the type of cipher 3) Breaking the cipher For that purpose, we use an original historical encrypted letter, which was sent in a bottle during the US civil war. The message was probably sent from John Grimes Walker. The receiver was Confederate general John Pemberton. The message is kept at the Museum of the Confederacy in Richmond and its content was unknown until a CIA code breaker broke it in 2010. You may download the latest version of CrypTool 2 from here: https://www.cryptool.org/en/ct2/downloads Like what I do 😄? Help fuel my crypto obsession 🎓 — buy me a coffee here☕— thx: https://buymeacoffee.com/cryptographyforeverybody