A One-Way Variable Threshold Proxy Re-signature Scheme for Mobile Internet

In recent years, the mobile Internet has been rapidly developed and widely used. Aiming at the problems of the weak computing power of mobile internet mobile terminal equipment, limited energy supply and high security requirements due to the complexity of mobile Internet environment, we proposes a secure and efficient server-assisted verification threshold proxy re-signature scheme, and the correctness of the program is verified. The proposed scheme includes a threshold proxy re-signature algorithm and a server-assisted authentication protocol scheme. Threshold proxy re-signature is a technique of proxy re-signature using threshold, which can decentralize the proxy’s signature rights. In the scheme, the verifier and the server send the complex signature verification operation to a semi-trusted server through the protocol, which effectively reduces the computational load of the verifier. The security analysis results show that the new scheme is safe and it is proved that the scheme is safe under collusion attack and adaptive selection message attack under the standard model. The performance analysis results show that the new scheme proposed in this paper has shorter signature length, less computational cost, higher verification efficiency and better adaptability to the mobile Internet environment.