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LibTMCG 1.3.1 released
     posted by stamer, Thu May 25 18:58:39 2017 - 0 replies

Small enhancements have been added. In particular, the class VSSHE now provides a simple variant of SetupGenerators_publiccoin().

LibTMCG 1.3.0 released
     posted by stamer, Sat May 13 18:06:02 2017 - 0 replies

This is mainly a bugfix release that removes some issues found by Coverity Scan. However, there are also some new undocumented protocols and experimental support for distributed key generation (DKG) has been added. The most important change is a verifiable setup of VTMF group generator. For some advanced protocols (e.g. Groth's shuffle) with more than two parties the distributed coin flipping protocol (EDCF) should be used.

LibTMCG 1.2.0 released
     posted by stamer, Sat Dec 31 16:29:51 2016 - 0 replies

After a year of work we proudly present LibTMCG 1.2.0.

The default security parameters have been updated to current state of the art. The complexity of hash function g() was improved. Unfortunately, this breaks compatibility with instances that have been compiled with older versions of LibTMCG. ...

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LibTMCG 1.1.3 released
     posted by stamer, Fri Dec 25 20:56:47 2015 - 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 Jul 21 22:47:32 2015 - 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 Aug 7 06:48:40 2009 - 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 May 12 10:37:28 2007 - 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 May 5 15:35:25 2007 - 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 Apr 16 11:40:24 2007 - 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 Apr 6 07:45:08 2007 - 0 replies

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

Older News Approved
Release of LibTMCG 1.0.0 posted by stamer, Thu Apr 13 05:55:08 2006 - 0 replies
Research paper on LibTMCG available posted by stamer, Wed Nov 23 20:13:18 2005 - 0 replies
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