Using Multi-Trust to Resist Whitewashing in P2P Systems
There are many malicious or selfish nodes in existing P2P systems, which leads to the research into trust maintenance mechanism. However, because many systems courage new consumers to join in with little or no cost, it is easy for malicious nodes to gain another identity. This so called whitewashing problem compromises system fairness and safety. This paper analyze this phenomena based on others′ research result. We use a double trust mechanism to handle this problem, in which we both penalize and encourage new consumers. Simulation results show that it can handle this problem well. Our basic idea can be applied to any trust maintenance mechanism.