IDEA.C

Name: idea.c.gz
Description: IDEA Module for GnuPG
Version: 2002-12-11
Size: 4.7 KB (4,777 bytes)
MD5 Sum: 374536bb2cdd68f5c0dce961ace26959
Developer: Werner Koch
Developer Website:
Obtained On: 4/13/2005
Obtained From: https://netfiles.uiuc.edu/ehowes/www/gpg-idea/gpg-idea.htm
Download URL: https://netfiles.uiuc.edu/ehowes/www/gpg-idea/idea.c.gz
Requirements: C compile and GnuPG 1.2.0 and later
Purchase Information: Free
License: Unrestricted except for inclusion of copyright notice.
Redistributable: Due to patent claims the distribution of the software is not allowed in Austria, France, Germany, Italy, Japan, the Netherlands, Spain, Sweden, Switzerland, the UK and the US. See http://www.noepatents.org/ to learn why software patents are bad for society and what you can do to fight them.
Comments: IDEA is a patented algorithm and therefore the use of IDEA in countries where this patent is valid can not be allowed due to restrictions in the GNU General Public License. Those restrictions are there to help protecting the freedom of software.

For more information on the nonsense of software patents and the general problem with this, please see www.noepatents.org.

If you still want to use IDEA and you are legally allowed to do so, you can download the idea.c.gz file and its signature , read the instructions at the top of the file, compile it and use it as a plugin for GnuPG. But please do us all a favor and use it only for decrypting. CAST5 and AES are good and patent unencumbered algorithms which don't bear any interoperability problems.

Windows user might be interested in the precompiled DLL and its signature.

Please note that the IDEA module, its location within the GnuPG installation directory, and the method for loading that module with the load-extension option have changed over successive versions of GnuPG.

References:


  1. Installing the IDEA Module in GnuPG
  2. Why not IDEA

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