P2P reputation systems are useful to evaluate the trustworthiness of peers and to combat malicious and selfish
peer behaviors. The reputation system assigns each peer a global reputation score through collecting locally generated
peer feedbacks and aggregation. In traditional reputation system, a peer rates the other by a score, and after a transaction
is finished, no more detail of transaction is considered in the process. In order to solve this problem, a novel reputation
aggregation scheme is proposed due to which detail of transaction could be considered, based on set pair analysis (SPA).
The empirical evaluation results reveal that the proposed approach is scalable, accurate, robust, and fault-tolerant.