On Wed, Mar 27, 2002 at 08:20:50AM -0600, Walstrom, Chad (chewie at wookimus.net) wrote:
> You definitely need the IDEA module in order to use this key.  I
> remember having to manually compile the module and placing the object
> file in my ~/.gnupg directory.   I see that Debian does have both a
> source and binary package you could use (gpg-idea and gpg-rsaidea).  If
> worse comes to worse, just download the *.orig.tar.gz file and compile
> it manually like I long ago.

When I was looking for it on gnupg's ftp site, I found this readme:

ftp://ftp.exobit.org/pub/security/gnupg/contrib/README.idea

idea.c - The GnuPG IDEA plugin.

Due to patent problems we do not keep the idea.c file any longer here on
this server.   If you are in a country where the distribution is allowed,
you might want to get it from its new distribution server; however we
suggest to avoid this algorithm entirely due to interoperability problems.

-- 
Amy Tanner
amy at real-time.com