Multi-Receiver Anonymous Signcryption Scheme in IoV
To address the issues of privacy leakage and false information from malicious vehicles in the Internet of Vehicle(IoV),this study proposes a multi-receiver anonymous signcryption scheme.This scheme enables a vehicle to send secret information to a set of Roadside Units(RSUs).The process involves two key steps.First,the use of a long-term pseudo-identity generated by the Trusted Authority(TA)and a short-term pseudo-identity generated by the vehicle itself ensure strong anonymity,providing conditional privacy and preventing leakage of the sender's identity.Second,during signcryption,the identity information of the specified group of recipient RSUs is calculated using a modular polynomial and incorporated into the ciphertext to maintain anonymity between RSUs.In addition,if a vehicle is detected tampering with or intercepting messages,it will be tracked and revoked by the TA.Based on the elliptic curve discrete logarithm problem and Computational Diffie-Hellman(CDH),the scheme's security properties,including message confidentiality,unforgeability,anonymity,and revocability,are proven.Security proofs and efficiency analysis show that the scheme offers high security.Experimental results show that,compared to related schemes,this scheme reduces the time required for the vehicle signcryption stage by 36.4％-54.7％,and the total time by 47.3％-56.7％.Furthermore,the scheme maintains a constant value in the decryption stage,providing high computational efficiency and practicability.
Internet of Vehicles(IoV)multi-receiver signcryptionanonymitytraceablerevocable
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