rotchiffre
Perform simple rotation cyphers.
The package defines a command \EdefRot that defines a
macro (whose name is given as an argument) to the rotation of the
given string. Available rotations are ROT13 (for
letters), ROT5 (for digits), ROT18 (for digits
and letters together) and ROT47 (for all ASCII
characters).
The package is part of the
oberdiek bundle.