


ROT13(1)            Linux Programmer's Manual            ROT13(1)


NAME
       rot13 - shroud text with simple rot-13 cypher

SYNOPSIS
       rot13 [input [output]]

DESCRIPTION
       This  manual  page documents the rot13 text filter.  If no
       filenames are specified, rot13 reads from stdin and writes
       to stdout.  If one filename is specified, rot13 reads from
       that file and writes to  stdout.   If  two  filenames  are
       specified,  rot13  reads from the first file and writes to
       the second file. You may use rot13 inside  the  vi  editor
       just as you would other filters, e.g. fmt.

       Rot13 performs Usenet-standard rot-13 encryption.  This is
       done by taking the input letter and shifting it left by 13
       characters, so an A becomes an N, a B becomes an O, and so
       forth. Applying rot13 a second time restores the  original
       text.  The  encrypted  version  of the sentence `The quick
       brown fox jumps over the lazy dog.' looks like this:

            Gur dhvpx oebja sbk whzcf bire gur ynml qbt.


       Note that rot-13 is obviously not secure  encryption.  The
       main  purpose  of  rot13  is to shield sensitive eyes from
       potentially offensive or disturbing public messages.  Most
       news  readers  provide a command to decode rot13 messages.
       For example, the tin news reader uses the command 'd'.

AUTHOR
       The original author is Marc Unangst.  Various ways of con-
       tacting him are:
            mju@mudos.ann-arbor.mi.us
            ...!umich!leebai!mudos!mju
            Marc Unangst of 1:2200/129.0@fidonet.org

       The  1994  update  was  done  by  Thomas  McWilliams.  See
       Changelog in the source distribution for details.

COPYING
       Distribution permitted under the terms of the GNU  General
       Public License, version 2 (or later versions at your pref-
       erence). Copies of this agreement are available from:

            Free Software Foundation, Inc.,
            675 Mass Ave,
            Cambridge, MA 02139, USA.








Linux                      01 Sept 1994                         1


