++
++
++The @code{memfrob} function converts an array of data to something
++unrecognizable and back again. It is not encryption in its usual sense
++since it is easy for someone to convert the encrypted data back to clear
++text. The transformation is analogous to Usenet's ``Rot13'' encryption
++method for obscuring offensive jokes from sensitive eyes and such.
++Unlike Rot13, @code{memfrob} works on arbitrary binary data, not just
++text.
+ @cindex Rot13