Hello, I'm trying to work on some programs to help me understand ciphers and ultimately cryptography. I've understood so far, that a simple form of bit-level cryptography is to split the original message into chunks the same length as a 'key' and then do an xor. I'm trying to keep this really simple so I can understand from first principles - so eg:
"Hello Tutors!" could be split into: "Hell" "o Tut" "ors!" and xor'd with "beer" I think I understand how xor works (thanks to an earlier post) but I'm not sure how to iterate over each letter in a string. What is the recommended way to do this? Thanks, S. _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
