Study On Identity Authentication Scheme Based Group Signature

Along with the rapid development of computer network technology, cryptology technology and the Internet, the network not only brings economic benefits and convenient, but also causes the personal information disclosure、distorted and counterfeited, and the military information stolen、 forged and destroyed, etc. Because the digital signature technology has data integrity inspection、 identification identity proof、prevention denying, etc.so it has a broad application value and prospect in financial,commercial, military and other fields.However, with the Deutches algorithm, Shor algorithm and Grove algorithm appearing, they threat serious to traditional cryptography. Then quantum information science becomes the forefront of attention gradually.First, ACJT scheme and BLS short group signature schemes are analyzed in this paper, an improved scheme is respectively presented to overcome the problem of scheme of prevention against. Second,this paper introduces the basic knowledge of quantum cryptography. Third, according to quantum infonnatics and group signature scheme theory, based on quantum signature scheme, a quantum group signature scheme is given. At the same times, this paper sets a message authentication system, based on the quantum group signature scheme, using four quantum state controls the quantum gate operations, to obtain participants in the calculation and inspectors check. Otherwise, because the message authentication communication mode is divided into quantum channel and quantization of classical channel, this result can also compare with quantization classic channel.So, it can be ensure that the candidate or the identity of the participants from two aspects. Final, the data analysis shows that this system has the good identification ability when quantum bits of the message length is not more than22, and this system can resist noise interference.