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Id: #6918
System Name: secureskat
Name: SecureSkat
Group Type: non-GNU software and documentation

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This project is not part of the GNU Project.

SecureSkat is a peer-to-peer implementation of the German card game Skat. The program negotiates possible players and game sessions over an arbitrary IRC network (Internet Relay Chat). It uses the C++ library LibTMCG to ensure a reasonable level of verifiablility for card operations. Furthermore, SecureSkat provides simple electronic voting capabilities based on a playing card encoding.

The cryptographic protocols of SecureSkat are designed with respect to the 'honest-but-curious' (aka semi-honest) adversary model. Thus we don't care about robustness or strong availability which are hard to achieve in a asynchronous environment. In general, we cannot prevent that malicious players share information about their private cards. But the protocols ensure that the shuffling of the deck is performed randomly (provided that at least one player is honest) and hence that the cards are distributed uniformly among the players. Moreover, face-down or private cards can be opened only, if all players work together.

Registration Date: Wed 13 Oct 2004 11:21:16 PM UTC
License: GNU General Public License v2 or later
Development Status: 5 - Production/Stable


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SecureSkat 2.11 released
     posted by stamer, Sun 03 Sep 2017 12:01:02 PM UTC - 0 replies

This is bugfix release that also reflect some small interface changes of LibTMCG. Thus the very recent version (>= 1.3.2) of LibTMCG is required.

SecureSkat 2.10 released
     posted by stamer, Sat 27 May 2017 01:54:08 PM UTC - 0 replies

After many years of inactiveness this release covers some minor bugfixes and improves the security parameters. Thus a recent version (>= 1.3.1) of LibTMCG is needed. Unfortunately, this also breaks backward compatibility with older versions of SecureSkat, i.e., game sessions with peers running a version <= 2.9 cannot be established anymore.

Our source code repository has moved
     posted by stamer, Wed 22 Jul 2015 08:45:00 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://

SecureSkat 2.9 released
     posted by stamer, Fri 07 Aug 2009 08:10:39 AM UTC - 0 replies

This is a code cleanup and bugfix release. First, some namespace issues have been solved in order to compile with newer versions of GCC and stdc++. Additionally, a bug in the rank statistic command has been fixed which was introduced in the previous version 2.8. Finally, the obsolete GnuTLS dependency has been removed.

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