E-cash system based on key-insulated cryptosystem
密钥绝缘的电子货币系统

The security of the bank's private key and efficiency of e-cash system were analyzed.Based on(t,n) key-insulated cryptosystem,a new e-cash system was presented which enhances the security of the bank's private key.On one hand,the private key of the issuer was evolved every period,and public key constant.On the other hand,each coin had a life cycle,and all the coins were divided into varies collections according to the issing perioed,which reduces the cost of double-spending checking and storage.