公开(公告)号：US5832089A

公开(公告)日：1998-11-03

申请号：US474035

申请日：1995-06-07

申请人： David W. Kravitz ,  Peter S. Gemmell ,  Ernest F. Brickell

发明人： David W. Kravitz ,  Peter S. Gemmell ,  Ernest F. Brickell

IPC分类号： G06Q20/02 ,  G06Q20/06 ,  G06Q20/10 ,  G06Q20/36 ,  G06Q20/38 ,  G07F7/08 ,  H04K1/00 ,  H04L9/30

CPC分类号： G06Q20/02 ,  G06Q20/06 ,  G06Q20/10 ,  G06Q20/3678 ,  G06Q20/383

摘要： An off-line electronic cash system having an electronic coin, a bank B, a payee S, and a user U with an account at the bank B as well as a user password z.sub.u,i, has a method for performing an electronic cash transfer. An electronic coin is withdrawn from the bank B by the user U and an electronic record of the electronic coin is stored by the bank B. The coin is paid to the payee S by the user U. The payee S deposits the coin with the bank B. A determination is made that the coin is spent and the record of the coin is deleted by the bank B. A further deposit of the same coin after the record is deleted is determined. Additionally, a determination is made which user U originally withdrew the coin after deleting the record. To perform these operations a key pair is generated by the user, including public and secret signature keys. The public signature key along with a user password z.sub.u,i and a withdrawal amount are sent to the bank B by the user U. In response, the bank B sends a coin to the user U signed by the secret key of the bankindicating the value of the coin and the public key of the user U. The payee S transmits a challenge counter to the user U prior to receiving the coin.

摘要翻译： 具有电子硬币的离线电子现金系统，银行B，收款人S以及在银行B具有帐户的用户U以及用户密码zu，i具有执行电子现金转移的方法 。 电子硬币由用户U从银行B中取出，电子硬币的电子记录由银行B存储。硬币由用户U支付给收款人S.收款人S向银行存放硬币 B.确定硬币已经用完，硬币的记录被银行B删除。确定删除记录之后的相同硬币的进一步存入。 此外，在删除记录之后，确定哪个用户U最初撤回硬币。 为了执行这些操作，用户生成密钥对，包括公钥和秘密签名密钥。 用户U将公共签名密钥以及用户密码zu，i和提款量发送到银行B.作为响应，银行B向由银行秘密密钥签名的用户U发送硬币，表示该值 硬币和用户U的公开密钥。收款人S在收到硬币之前向用户U发送询价计数器。