I have eleven ciphertexts that were encrypted with the same key (which I don't know). I want to decrypt the last ciphertext. I read similar question like Many time pad attack but I can't solve my problem with their answer.
I'm new in Crypto can anyone tell what can I do?
I know when XOR two ciphertext (Let's assume that the plaintexts consist only of spaces and ASCII letters) if both of them were space the result is null. If one of them was space and another was ASCII we have a new ciphertext. If both of them were ciphertext we have new word that is XOR of orginal message but how can I reveal the plain-text?