E-cash Model Based on Zero-knowledge Identity Proof

Abstract

In order to solve the security problem that the E-cash users get from bank have no blindness in the new E-cash system based on partial blind signature,this paper brings forward a new E-cash payment model which combines zero-knowledge identity proof based on improved ELGamal signature and partial blind signature. It can track user with the help of the third trusted party to avoid using E-cash illegally. Security analysis indicate that the model has strong security and practicability.