Improved blind signature electronic cash scheme

With analyzing some unsafe factors of on-line electronic cash system such as the repeat attacks and reveal users' information,this paper designs a RSA blind signature scheme,which creates a unique serial number by the Trusted Third Party TTP.Through discussion about safety and efficiency,this scheme has anti-repeat attacks,non-repudiation attack,anti-repeat draw and non-tracking,etc.even more security features.In addition,without adding timestamp and tracking electronic cash information,space efficiency has been improved only by storing the serial number.