Abstract: Tor network,as one of the most popular anonymity networks,uses TCP protocol as the transport layer protocol,and this choice leads to problems such as head-of-line blocking,unfair bandwidth allocation,and inefficient congestion control,which seriously affects the performance and scalability of the Tor network,and there are researches on Tor Over QUIC mode using QUIC protocol to solve these problems.However,the single performance evaluation index in Tor Over QUIC mode focuses only on delay and security evaluation,which is difficult to reflect the comprehensive impact of protocol upgrade on the core characteristics of anonymity network,resulting in unclear direction of protocol optimization and lack of data support for deployment decisions.This lack of evaluation dimension not only restricts the full play of the advantages of QUIC protocol,but also affects the user’s willingness to adopt the protocol due to the performance shortcomings,which easily affects the promotion and use of Tor Over QUIC.Therefore,this paper proposes a multi-dimensional performance evaluation method based on Tor Over QUIC,which comprehensively evaluates the performance of Tor Over QUIC mode from multiple dimensions such as latency,anonymity,security,robustness,and usability,in order to guide the deployment and use of Tor Over QUIC.Comparative experiments on Tor network and Tor Over QUIC network show that the evaluation method is effective and practical.

Key words: Tor network, QUIC protocol, Evaluation, Metrics, Anonymous networks