Restrictions / Commercial Use?

Werner Koch
Mon Apr 1 19:45:01 2002

On Sun, 31 Mar 2002 14:02:58 CST, Greg Strong said:

> Are there any restrictions on using GnuPG for commercial use?  


> While the installation instructions for GPGshell at 

GPGShell is a proprietary software not related to GnuPG, the GPL or the
FSF.  It just happens that GPGShell uses GnuPG as a backend.  This is
similar to run the proprietary ORACLE DB on GNU/Linux.

> to use the following GPG-version. Please keep in mind that this file 
> contains a version with implemented IDEA-algorithm which is free only 
> for non-commercial use!"

By distributing a modified GnuPG version with the IDEA algorithm
included, the distributor violates the license terms of GnuPG (section
7 of the GNU GPL).  Thanks for bringing this to my attention.

> I've scanned the GNU General Public License (GPL) in plain text format 
> at  I believe this license governs 
> the distribution of GnuPG.  I don't recall seeing any restrictions on 
> use meaning commercial versus non-commercial.

You are right.  The FSF actually encourages the commercial use of Free
Software - the "free" stands for freedom and not for price.

> The only thing I can see different is the fact that GPGshell 
> installation instructions reference a different file, 
>, than GnuPG,

The -2 version fixes a potential security problem with the included
compression library (ZLIB).  The file  gnupg-w32-1.0.6-1.0.6-2.diff in
the same directory of the FTP server contains the changes in source form.


Werner Koch                  Omnis enim res, quae dando non deficit,   
FSF Europe                   dum habetur et non datur, nondum habetur,
Vice-Chancellor Germany      quomodo habenda est.        -- Augustinus