The Theoretical Study On Blind Signature Schemes

Blind signaturehas the advantages of concealment and protection of personal information,so it is obvious that the status of blind signature in network security is important.Partially blind signature can protect the privacy of users and can prevent illegal activities by blindness.It is meaningful to study the deeper level of these two kinds of blind signature.A blind signature must be make the requirements safely and practically.Making the blind signature simple and practical is the purpose study of blind signature.This paper make a general summary of the blind signature schemes and it summarizes the current blind signature and partially blind signature which they have the strengths and weaknesses.There isdoing the following two tasks:1.The thesis designs the identity based blind signature scheme,the security of the scheme was proved.It sets the enemy who attacks the scheme.Thescheme is proved that under with the adaptive chosen the attacking messages is safety.It proved the blindness of the blind signature.All of the above shows that security of the proposed scheme.Compared with the existing the scheme in this paper is more simple and practical scheme.The scheme uses only 1 pairings.The efficiency of scheme is relatively efficiency.The efficiency of all the calculated uses a common unit of measurement,The efficiency conversion scheme were shifted into specific numbers.2.The design of ID based partially blind signature scheme and prove the security of proposed scheme.It setsthesimulation of adversary who attacks the scheme.The scheme is proved that under with the adaptive chosen message attack is safety.It is proved safety that the integrity of the partially blind signature is partially blind and partially blind signature.Comparing with the existing partial blind signature scheme,this scheme is more simple and practical.Each scheme uses only 1 pairings,efficiency is relatively high.It is also taking the efficiency of contrast with some partial blind signatures.