Research On Goup Blind Signature Application In Multiple-bank Electronic Cash System

In modern society, Internet develops very quickly. as a new business model,e-commerce attract more and more attention. It is a product of the InformationSociety. Compared with the traditional business model, electronic commerce has theadvantage of more rapid and convenient, the development of e-commerce changedthe mode of operation and business structure of the traditional business activitiesfundamentally. For e-commerce, electronic payments are the key, which directlyaffects the speed and scope of the development of electronic commerce. In thepresent way of electronic payment, electronic cash is crucial, and also the potentialmeans of payment.Security and Efficiency are the biggest problem in electronic cash. Focus of theresearch are group signature, blind signature and group blind signature in digitalsignatures, improve them in response to their lack, and research how the group blindsignature technology application in the multi-bank electronic cash system. Study onthe paper is in two parts as follows.The first part, the group signature, blind signature, and the combination of tthemgroup blind signature are currently the focus of Modern Cryptography research, theyhave a wide range of applications not only in the political field and the military field,but also in the business world. The paper study more in-depth on group signatures,blind signature and group blind signature, analysis advantages and disadvantages ofexisting programmers. Focused on LR98group blind signature schemes, analysis theefficiency of its security and then build a joint attack on the original proposal,improving the efficiency of the programmed.The second part, currently electronic commerce is in the process of rapiddevelopment, therefore the appropriate payment method is critical, and compared toother methods of payment, electronic cash is more appropriate for payment. In reallife, users and merchants can choose a number of banks for transaction, electroniccash can also circulate among multiple banks. This article analysis the research onmulti-bank electronic cash, then describes some of the existing programmers andsystems, and summarizing the problem to be solved. based on the Improved groupblind signature scheme, we construct group blind signature application model on themulti-bank electronic cash system, which guarantees the electronic cash system isfair,offline, and can effectively prevent duplication of consumption, with a trail that can effectively prevent criminal acts such as extortion.