A routing method with metadata privacy protection and source accountability capabilities

Abstract

The invention belongs to the technical field of computer network security, relates to an efficient routing protocol that provides both anonymity and accountability at the network layer, and specifically relates to a routing method with metadata privacy protection and source accountability capabilities. The technical solution of the invention is to attach the group signature to the message network layer to achieve the balance of anonymity and accountability. The group signature in the message can provide extensive and efficient accountability. It can be verified by any router on the path in a non-interactive way to verify the authenticity of the message, thereby eliminating the communication overhead when verifying the message. At the same time, the group signature protects the privacy of the sender, making the signer indistinguishable from entities outside the group within the group. In addition, in order to further reduce the verification overhead of the group signature, the present invention designs a challenge-based separation verification mechanism. Compared with precomputation and batch verification, the separate verification mechanism can reduce the verification load of the designated router to a greater extent, thereby improving the efficiency of the protocol.

Description

technical field [0001] The invention belongs to the technical field of computer network security, relates to an efficient routing protocol that provides both anonymity and accountability at the network layer, and specifically relates to a routing method with metadata privacy protection and source accountability capabilities. Background technique [0002] A large number of network monitoring incidents have made the public's demand for communication privacy protection increasingly strong. Although traditional end-to-end encryption can protect data privacy, it cannot protect host identity privacy. Attackers can still know "who communicates with whom where and when" through network attacks. Therefore, anonymous communication emerges as the times require. Anonymous communication mainly protects metadata in the communication process while protecting data privacy, thereby protecting user identity privacy. Since the birth of the first anonymous network (Chaum's Mix-Nets), researche...

AI Technical Summary

Problems solved by technology

But APNA also has some problems: sharing keys within the source domain reduces the anonymity set

In addition, entities outside the source domain cannot interpret EphID and have no accountability

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