Construction Of Novel And Practical E-cash System

Along with the development of computer technology,the traditional currency is facing a transformation.The currency's electronic problem becomes more and more important.The E-Cash based on the computer science,functions such as physical currency's storability and settlement can be carried out.A good E-Cash system must have Anonymity, Currency value,Verifiable Offine,Uniqueness,Storable,Payable,Falsify Forbidden and Copy Forbidden at least.Meanwhile efficient is a key factor to evaluates E-Cash system.The main works and contributions of this dissertation can be summarized as follows:1: This dissertation first introduction the existent problem of electronic business and electronic cash system through analysing them , then sort it and give solution;2: Then this dissertation put forward and analysis a kind of new and efficient public key infrastructure modification solution through analysis modern PKI, which E-Cash system depend on;3: Late on, this dissertation introduction a classical E-Cash system, meanwhile construction several novel and efficient E-Cash system;4: At the end of this dissertation is expectation of E-Cash's tomorrow.