Research And Application Of Blind Signature

With the development of computer network technology, the security issue of information system becomes more and more important. The digital signature, which has the property of authentication, integrity and non-repudiation, plays an important role in computer network security. With deeply applying into military, communication, e-commerce, etc, normal digital signature can't satisfy special requirement of people, therefore, special digital signature schemes, which are on the basis of digital signature, are the focus of this paper.As a special digital signature, blind signature can insure signing requester's anonymity. Thus it has a wide prospect in the electronic cash and electronic voting systems. In this paper, we mainly discuss blind signature's theory and its application.The writer has made some progress in blind signature by reading many literatures. The following are the main research results:(1) A series of Okamoto-Schnorr blind signature schemes based on elliptic curve are got with the theory proving and analysis.(2) Zhang tong and Wang yumin's partial blind signature schemes are analyzed and three partial blind signature schemes based on elliptic curve are designed. Our schemes provide a new approach of applying the original schemes.(3) As very few research on multiblind signature scheme, three new multiblind signature schemes based on elliptic curve are proposed. It is possible for many signers to sign a blinded message by using these schemes. The size of the digital signature is unchangeable and will not be increased as the number of signatories increases.(4) The primary knowledge of the electronic cash and electronic voting are introduced. Then the blind signature scheme is applied to the electronic cash, from which we can know the importance of the blind signature.