It is clear to me that the patent expired but it is not clear how I'm allowed to use the sourced of idea.c
I have to use GnuPG 1.4.10 and a self compiled idea.c from here ftp://ftp.uwsg.indiana.edu/linux/gentoo/distfiles/idea.c.gz so the question is .. can I ship the idea shared object with my software? The idea.c contains the following comments. So if I understand it correctly, I just have to add this somewhere in the documentation of my software. /* idea.c - IDEA algorithm * Copyright (c) 1997, 1998, 1999, 2001, 2002 by Werner Koch (dd9jn) * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * WERNER KOCH BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Werner Koch shall not be * used in advertising or otherwise to promote the sale, use or other dealings * in this Software without prior written authorization from Werner Koch. * * DUE TO PATENT CLAIMS THE DISTRIBUTION OF THE SOFTWARE IS NOT ALLOWED IN * THESE COUNTRIES: * AUSTRIA, FRANCE, GERMANY, ITALY, JAPAN, THE NETHERLANDS, * SPAIN, SWEDEN, SWITZERLAND, THE UK AND THE US. */ On Mon, Mar 25, 2013 at 3:14 PM, Werner Koch <w...@gnupg.org> wrote: > On Mon, 25 Mar 2013 13:46, chal...@gmail.com said: > > > is the IDEA algorithm licensed? Under which conditions am I allowed to > use > > the idea extension in a commercial product? > > I assume your question is: Is the IDEA algorithm patented? > > It was patented and this was one or the main reasons to develop GnuPG as > the free PGP replacement. > > Meanwhile the patent expired: > > * Patents on IDEA have expired: > * Europe: EP0482154 on 2011-05-16, > * Japan: JP3225440 on 2011-05-16, > * U.S.: 5,214,703 on 2012-01-07. > > Thus if you have to decrypt old data you may now use a decent GnuPG > versions to do that (1.4.13 or 2.x along an appropriate Libgcrypt > version). > > > Salam-Shalom, > > Werner > > -- > Die Gedanken sind frei. Ausnahmen regelt ein Bundesgesetz. > > -- Jan
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