diff --git a/ssh-keygen.1 b/ssh-keygen.1
index 242ed0e..3371344 100644
--- a/ssh-keygen.1
+++ b/ssh-keygen.1
@@ -1,15 +1,39 @@
 .\"  -*- nroff -*-
 .\"
-.\" ssh-keygen.1
-.\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
-.\"
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 .\"                    All rights reserved
 .\"
-.\" Created: Sat Apr 22 23:55:14 1995 ylo
+.\" As far as I am concerned, the code I have written for this software
+.\" can be used freely for any purpose.  Any derived versions of this
+.\" software must be clearly marked as such, and if the derived work is
+.\" incompatible with the protocol description in the RFC file, it must be
+.\" called by a name other than "ssh" or "Secure Shell".
 .\"
-.\" $Id: ssh-keygen.1,v 1.17 2000/09/01 23:08:09 djm Exp $
+.\"
+.\" Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
+.\" Copyright (c) 1999 Aaron Campbell. All rights reserved.
+.\" Copyright (c) 1999 Theo de Raadt. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
 .Dd September 25, 1999
 .Dt SSH-KEYGEN 1
@@ -200,7 +224,8 @@
 This version of OpenSSH
 .Bl -bullet
 .It
-has all components of a restrictive nature (i.e., patents)
+has all components of a restrictive nature (i.e., patents, see
+.Xr crypto 3 )
 directly removed from the source code; any licensed or patented components
 are chosen from
 external libraries.
@@ -219,3 +244,4 @@
 .Xr ssh-add 1 ,
 .Xr ssh-agent 1 ,
 .Xr sshd 8 ,
+.Xr crypto 3