Gesellschaft fr Informatik e.V.

Lecture Notes in Informatics

Information SystemsTechnology and its Applications, 5th International Conference ISTA 2006, May 30-31 2006, Klagenfurt, Austria P-84, 67-80 (2006).



Dimitris Karagiannis, Heinrich C. Mayr (eds.)


Tamper protection of online clients through random checksum algorithms

Gisle Grimen , Christian Mönch and Roger Midtstraum


We describe a new purely software-based, self-checking mechanism designed to prevent tampering of client programs in client/server-applications like online-games, peer-to-peer networks, or online auction systems. Our mechanism consists of randomly creating checksum algorithms at the server. The checksum algorithms are integrated into autonomous short-lived software code, called Mobile Guards, which are downloaded to a client program during its execution. The client programs are designed to be functionally dependent on the execution of a Mobile Guard. The randomly created checksum functions and the concept of Mobile Guards enable a highly dynamic protection mechanism, capable of rapidly evolving as new threats arise.

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ISBN 3-88579-178-1

Last changed 24.01.2012 21:54:11