Research On Blind Signature Schemes And Their Applications

With the development of science and technology, computers are widely used in every field of our society. This promotes the Internet technology, which is convenient to people's life and work. However, everything has two sides. Communication by Internet accesses the development of the society to informational and makes people exchange information in time, but it is not secure because of technique factors and attacks. That is to say, the information can be deleted and tampered during its conveying, which causes much trouble. So the digital signature is produced since it has the property of authentication, integrity and non-repudiation.As a special digital signature, blind signature has the property of protecting the information signed by a signer. Thus it has a wide prospect in the electronic cash and electronic voting. Blind signature makes the information unknown to the signer, which causes more parameters. So it has an effect on the speed of signing a message. How to design a good blind signature is a very important problem in future research.The writer has made some progress in blind signature. The following are the main research results:1. The security of several famous blind signatures is analyzed. A new blind signature is proposed. It has the characteristic of blind signature and an easy algorithm that makes it easy to realize.2. The concept and the merit of the partial blind signature are introduced.3. The notion of the group blind signature is given. Two new group blind signatures are proposed.4. The primary knowledge of the electronic commerce is introduced. The new schemes are applied to the electronic cash later.5. Some knowledge of electronic voting is given, from which we can know the importance of the blind signature.