Abstract:

A lattice-based identity-based proxy partially blind signature scheme is widely used in E-business, E-government, software security, and many applications. Considering the problems of master key leakage, malicious user attack and signature forgery in lattice-based proxy blind signature, a lattice-based identity-based proxy partially blind signature scheme under the standard model is proposed, which constructs the public key of signature by using matrix cascade technology rather than matrix multiplication technology. It solves the problem of master key leakage in the existing schemes, and uses partial blind signature technology to solve the problem of malicious user attack in the fully-blind signature scheme. The analysis of security shows that the scheme not only realizes the functions of proxy signature and blind signature, but also contains some security features such as preventing the disclosure of the master private key, resisting the attacks from malicious user and existential unforgeability under adaptive chosen message attacks(EUF-CMA).

Key words: blind signature, proxy signature, lattice, vulnerability, anti-quantum