We've intercepted this message that was encrypted using some kind of simple autokey cipher where the ciphertext is used as the subsequent encryption key. We don't have the initial encryption key but we know that the initial encryption key is only byte, so it should be easily breakable.

d2badfff99f594f3d3bac9e9baf1a885c491c58aa79eaa9bab

What is the initial encryption key (in hexadecimal representation)?

What is the flag (e.g., SKY-ABCD-1234)? (You will see the flag once you decrypt the ciphertext)

Answer rating: 100% (QA)

decryption process Ciphertext d2badfff99f594f3d3bac9e9baf1a885c491c58aa79eaa9bab Convert c... View the full answer