On the security enhancement of an efficient and secure event signature protocol for P2P MMOGs

Abstract

In 2008, Chan et al. presented an efficient and secure event signature (EASES) protocol for peer-to-peer massively multiplayer online games (P2P MMOGs). EASES could achieve non-repudiation, event commitment, save memory, bandwidth and reduce the complexity of the computations. However, we find that Chan et al. EASES protocol suffers from the passive attack and this attack will make a malicious attacker to impersonate any player to replay the event update messages for cheating. As a result, we introduce a simple countermeasure to prevent impersonate attack while the merits of the original EASES protocol are left unchanged. © 2010 Springer-Verlag Berlin Heidelberg.