This is an encryption algorithm commonly used for hiding information in usenet posts that is open to all but not immediately readable. An example is posting about film endings, or example answers.

The algorithm is actually a [caesar] cipher with a 13 place rotation. This number is special because in an alphabet with 26 letters, caesar 13 and caesar -13 use the same map, so the same call can be used for encoding and decoding. ([RS])

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See also [vignere], [caesar], [uuencode], [base64] 

[Category Package] [Category Cryptography]