Design And Analysis Of Revisable Reputation Evaluation System Based On Blockchain

With the rapid development of Internet e-commerce,new consumption pattern grows popularity in our daily life.However,while providing convenience to us,the platform also brings various problems.Many merchants hold the attitude of dealing with the same customer only once,hence the true information of their merchandise is often concealed by intention.Besides the bad credit condition of current society,all these factors lead to a situation that buyers and sellers do not trust each other during transaction processes.This condition provides the hotbed for the advent and development of reputation evaluation system,the system that collects and analyzes the evaluation of merchandise and merchants made by their consumers and later publishes them.Credit evaluation is a crucial reference factor for buyers to make their purchase,and a significant evidence for buyer and seller to estimate each other's credit status.A reasonable reputation system should allow a customer to browse the evaluation information of the merchandise and get a rather accurate reference information before deciding to buy it.And in the same time the merchant could observe the credit of the customer and make according estimate.In a normal electronic payment scenario,the merchandise is often delivered after its payment collected,and the customer cannot judge the quality of the merchandise before he takes a close look.Therefore,reputation evaluation system becomes increasingly important in e-commerce.In this case,how to design a reliable online business reputation and make it an important support component in e-commerce arouses the attention of domestic and foreign scholars.However,traditional reputation evaluation system has some certain defects.In most cases,a third party,which can judge the validity and reliability of evaluation information,is needed in the traditional reputation evaluation system.However,a fully trusted third party does not exist,and by bringing in a third party,many problems such as message leakage and tempering occur.Aiming at above problems,in current reputation evaluation system and blockchain technology framework,we propose a blockchain-based modifiable reputation evaluation system with the help of ring signature,group signature and blockchain technology in this paper.International Journal of High Performance Computing and Networking(IJHPCN)has cited this achievement.Our contributions are as follows:1.We propose a blockchain-based modifiable reputation evaluation system,by which we use blockchain technology and digital signature technology,make cryptographic check on the evaluation information the customer provided,and generate tamper-resistant blockchain records,all in the framework of traditional reputation evaluation system.Therefore,the third party,which comprehensively exists in previous works,is removed.Moreover,while the anonymity of the user evaluation is surely guaranteed,users are also able to amend their own evaluation information.In addition,aiming at the possible problems anonymity may bring,we make our reputation evaluation system a group signature-based one,and hence the system can issue a request of traitor tracking when it is needed.We have patented the research and constructing method of this system.2.We design an anonymous voting scheme base on FISCO-BCOS and ring signature.In our scheme,under circumstance of allowing the existence of supervisory nodes,access control is required before the ballot ticket is submitted to the chain.The anonymity of voters are guaranteed and at the same time,voting multiple times is not allowed for a single voter.We make thorough analyses on security and efficiency of the two schemes we proposed in this paper.At last,we analyze the efficiency of each part of the system using Truffle framework in linux environment.It turns out the two schemes are highly efficient in terms of system overhead.