-.\" $OpenBSD: caesar.6,v 1.9 2015/01/15 19:06:31 schwarze Exp $
+.\" $OpenBSD: caesar.6,v 1.10 2024/08/26 20:12:33 jmc Exp $
.\"
.\" Copyright (c) 1989, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" @(#)caesar.6 8.2 (Berkeley) 11/16/93
.\"
-.Dd $Mdocdate: January 15 2015 $
+.Dd $Mdocdate: August 26 2024 $
.Dt CAESAR 6
.Os
.Sh NAME
.Nm rot13 ,
it will rotate by 13 characters.
This format is commonly used on USENET
-and in some of the databases used by the
-.Xr fortune 6
-program to
+to
.Dq disguise
-their content.
+content.
.Pp
The frequency (from most common to least) of English letters is as follows:
.Bd -filled -offset indent