Symmetric Substitution
ROT13 is its own inverse; applying it twice restores the original text message.
Spoiler Concealment
Popular online cipher for hiding puzzle answers, spoilers, and punchlines.
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ROT13 Cipher Result
What is ROT13?
ROT13 (Rotate by 13 places) is a simple substitution cipher that replaces a letter with the 13th letter after it in the English alphabet.
