A Caesar cipher replaces each letter with the one a fixed number of places along the alphabet.
Why it matters
ROT13 is the shift-of-13 case, which is its own inverse. It offers no real security, as only 25 shifts are possible.
A Caesar cipher replaces each letter with the one a fixed number of places along the alphabet.
ROT13 is the shift-of-13 case, which is its own inverse. It offers no real security, as only 25 shifts are possible.