ROT13 hides online secrets with a simple shift
ROT13 is a simple substitution cipher that shifts letters by 13 positions, allowing users to hide and reveal text for online puzzles and spoilers with ease.
ROT13 is a clever substitution cipher that shifts each English letter 13 positions, wrapping from Z to A. This simple trick, a digital twist on ancient Caesar ciphers, became popular on 1980s online forums like Usenet. Since the alphabet has 26 letters, applying ROT13 twice restores the original text, making it its own inverse.
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