ROT13(1) Linux Programmer's Manual ROT13(1)NAMErot13 - shroud text with simple rot-13 cypher
SYNOPSISrot13 [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 file‐
name 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 tak‐
ing 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 dis‐
turbing 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 contacting 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 preference). Copies of
this agreement are available from:
Free Software Foundation, Inc.,
675 Mass Ave,
Cambridge, MA 02139, USA.
Linux 01 Sept 1994 ROT13(1)
