Noun
ROT13 (uncountable)
A simple Caesar cipher where each letter is replaced by the letter 13 positions beyond it in the alphabet (wrapping at Z to A).
Because of its utter unsuitability for real secrecy, ROT13 has become a catchphrase to refer to any conspicuously weak encryption scheme; a critic might claim that "56-bit DES is little better than ROT13 these days". Source: Internet
By extension, triple-ROT13 (used in joking analogy with 3DES) is equivalent to regular ROT13. Source: Internet
Like ROT13, XOR (and therefore memfrob() ) is self-reciprocal, and provides a similar, virtually absent, level of security. Source: Internet
Its operation, when executed, is either to perform ROT13 encoding on, or to reverse its input. citation The newsgroup alt. Source: Internet
ROT13 ("rotate by 13 places", sometimes hyphenated ROT-13) is a simple letter substitution cipher that replaces a letter with the letter 13 letters after it in the alphabet. Source: Internet
A second application of ROT13 would restore the original. Source: Internet