A Game Model of P2P Based on Punishment Strategies

In recent years, the security of P2P networks has become increasingly obvious, it is accompanied by the continuous development of these networks. This paper analyzes and contrasts the earnings of the nodes which based on the nodes behavior of selfishness and betrayal, therefore the penalty factor is presented for the P2P game model. After reasonable analysis and the simulation by gambit, it is proved that the penalty factor has certain constraints on the betray nodes and will promote the active cooperation of the nodes in order to improve the issues of P2P networks security.