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LibTMCG 1.1.3 released
     posted by stamer, Fri 25 Dec 2015 08:56:47 PM UTC - 0 replies

We have just released LibTMCG 1.1.3. It contains new classes and methods for the so-called VRHE scheme, i.e. an efficient zero-knowledge argument for verifiable rotations (cyclic shuffle) whenever the VTMF card encoding is used. A test program ist also included.

Our source code repository moved to git
     posted by stamer, Tue 21 Jul 2015 10:47:32 PM UTC - 0 replies

The project has moved it's master source code repository from CVS to git. You can clone the repository by the following line:

git clone git://

LibTMCG 1.1.2 released
     posted by stamer, Fri 07 Aug 2009 06:48:40 AM UTC - 0 replies

This is a bugfix release created in order to deal with C++ namespace changes of GCC 4.3.x. No new features have been added.

RPM packages available
     posted by stamer, Sat 12 May 2007 10:37:28 AM UTC - 0 replies

Toni Graffy (PackMan team) has kindly provided RPM packages for SuSE Linux 10.0, 10.1, and openSuSE 10.2. The packages are available on and in the PackMan repository as well.

LibTMCG 1.1.1 released
     posted by stamer, Sat 05 May 2007 03:35:25 PM UTC - 0 replies

A major security bug (missing range check) was fixed, which allows an adversary to choose trivial group generators. This flaw has a crucial impact on the confidentiality of private cards. Thus, we strongly recommend all users to update LibTMCG as soon as possible.

LibTMCG 1.1.0 released
     posted by stamer, Mon 16 Apr 2007 11:40:24 AM UTC - 0 replies

Some interfaces were changed to allow the creation of keys without included non-interactive zero-knowledge proof of validity. In particular, this is more convenient whenever the new VTMF encoding scheme is used. Further some optimizations have been applied.

LibTMCG 1.0.1 released
     posted by stamer, Fri 06 Apr 2007 07:45:08 AM UTC - 0 replies

This is mainly a bugfix release with improved documentation. No new features have been added.

Release of LibTMCG 1.0.0
     posted by stamer, Thu 13 Apr 2006 05:55:08 AM UTC - 0 replies

Finally, after years of hard work an initial release of LibTMCG was completed. LibTMCG is a general purpose C++ library for creating secure electronic card games. The most remarkable feature is the absence of a trusted third party (TTP), i.e., ...

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Research paper on LibTMCG available
     posted by stamer, Wed 23 Nov 2005 08:13:18 PM UTC - 0 replies

A research paper [1] on the implementation details including a performance analysis of LibTMCG is now available. This work will be published in the post-proceedings of the Western European Workshop on Research in Cryptology (WEWoRC 2005).


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