Privacy-preserving Communication for Vehicular with Multi Receiver Conditionally Anonymous Ring Signcryption

摘要

In this paper, we propose a privacy preserving protocol based on multi - receiver conditional anonymous ring signcryption. The sender can not only send the same messageto the selected multi-receiver and only selected users can correct to decrypt the message, but also receiver reality validate the identity of the sender, preventing personating attack to the sender. At the same time, when the message is controversial, it can accurate trace to the source of the message. The protocol has the advantages of message confidentiality, message authentication, anonymity and traceability. The protocol does not depend on any fully trusted authority during the tracing phase.