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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 verifiability for the card operations (e.g. shuffling). Furthermore, SecureSkat provides electronic voting capabilities based on a simple 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 2.13 released
     posted by stamer, Mon 08 Jan 2018 04:39:56 PM UTC - 0 replies

This release fixes a regression introduced in the last release: due to the increased default Rabin key size of 2048 bit the signatures have been also grown. Then the usual character limit of an IRC message (512 bytes) prevents any game session during the bid phase. We solved this issue by reducing the hash size (and algorithm) of the unique game identifier.

SecureSkat 2.12 released
     posted by stamer, Thu 21 Dec 2017 05:14:54 PM UTC - 0 replies

This release is two-fold: First of all, by setting the optional environment variable ALTHOST (i.e. to an onion address of a local running hidden service, see README), the IRC and P2P connections can be established within the TOR network. That means, ...


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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.


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