Copyright:
 Copyright (C) 2001 Philipp Rumpf
 Copyright (C) 2001 Jeff Garzik <jgarzik@pobox.com>
 Copyright (C) 2004-2010 Henrique de Moraes Holschuh <hmh@debian.org>
 Copyright (C) 2019, 2020 mirabilos <t.glaser@tarent.de>
Debian packaging:
 Copyright © 2014, 2019, 2020 mirabilos <t.glaser@tarent.de>
 Copyright © 2015 mirabilos <thorsten.glaser@teckids.org>
 Copyright (c) 2003-2010 Henrique de Moraes Holschuh <hmh@debian.org>
 Copyright (c) 2002 Viral Shah <viral@debian.org>
 distributed under the same license as the upstream source it applies to.
Upstream Authors:
 Philipp Rumpf,
 Jeff Garzik <jgarzik@pobox.com>
 Henrique de Moraes Holschuh <hmh@debian.org>
Changes:
 The Debian version of rngd is extensively patched with added
 functionality and bugs courtesy of Henrique de Moraes Holschuh.
 All changes were supposed to be proposed to be merged upstream, but the
 deviation got too large to handle, so it hasn't happened.  See upstream
 changelog for a list of all changes.
Licence:
 This program is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
 Free Software Foundation; either version 2, or (at your option) any
 later version.

The GPL may be found in /usr/share/common-licenses/GPL-2 on a Debian system.