Analysis And Improvement Ring Signature Scheme

Ring signature is how anonymous it secret under the background of the proposeda signature technology, it is no trusted center, and the signer group, the process ofbuilding and for verifer signature is completely anonymous, so the ring signatureis sometimes seen as a special kind of group signature.Ring signature has manyimportant applications in military, economy, such as anonymous leaks information,electronic voting system, the protection of intellectual property rights,etc. Thispaper mainly research on several problems as follows.1.We discuss the ring signature scheme (also called ZLW scheme) which wasproposed by Zhang Yueyu et al.Then we found that it exists many known signatureforgery attacks. This article uses the hash function efect on random sequence,thispaper proposes a new ring signature scheme and analysis results show that the newscheme under stronger security model3is still safe.2.We discuss the ring signature scheme (also called WZM scheme) which wasproposed by Wang Lingling et al.Find the ring signature scheme validation equationhas a linear relationship,So ring members have change attack.This article uses thehash function efect on members of the set,Destroyed the verifcation equation linearrelationship,thus proposed a new ring signature scheme,the results show that the newscheme under stronger security model3is still safe.3.Study of cryptographic protocols based on ring signature,then put forwardthe proposals for anonymous electronic voting and electronic cash protocol. Theseagreements have inherited the anonymity of ring signature feature,a fundamentalguarantee their anonymity can be applied to some of the needs of a particularenvironment.