Research On Blind And Ring Signature And Their Application To Electronic Voting

Blind signature was to guarantee the bank can not track electronic cash in the process of electronic payment. Ring signature was proposed in the situation that the signer hopes the information can be anonymously leaked. With the development of electronic commerce and electronic government, people are devoted to improve the security and efficiency of blind signature and ring signature meanwhile, some function expansions are carried on to unceasingly satisfy commerce and the government activity's needs.This article researched and analyzed the above-mentioned two kinds of signature schemes. Firstly, it was pointed out that the blind signature scheme based on RSA and two kinds of blind signatures based on the discrete log problem on elliptic curves did not provided with untraceability. Secondly, after former ID-based blind signature was improved, the new signature scheme has possessed forward security and completely solves the problem of key escrow. Thirdly, the fabrication of a ring signature from bilinear pairings is disclosed, moreover, the signature scheme to not only avoid this problem but also add verifiable function is proposed. Finally, by integrating and choosing blind, group and ring signature with superior properties, the new electronic voting scheme is proposed according to inherent pattern.