Li Zi
Abstract
Recently,Lee and Chang have proposed an efficient group signature based on discrete logarithm problem In this paper,we will propose a forgery attack to this signature scheme and present a new modified and secure group signature scheme
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Recently,Lee and Chang have proposed an efficient group signature based on discrete logarithm problem In this paper,we will propose a forgery attack to this signature scheme and present a new modified and secure group signature scheme
Key concepts: Group signature, Schnorr signature, ElGamal signature scheme, Discrete logarithm, Cryptanalysis, Ring signature, Merkle signature scheme, Blind signature