发明名称 |
OFF-LINE COMPATIBLE ELECTRONIC CASH METHOD AND SYSTEM |
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 zu,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 An electronic coin is withdrawn from the bank B by the user U and an electronic record of the electronic coin is stored by the bank B. The coin is paid to the payee S by the user U. The payee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 zu,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 bank indicating 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. |
申请公布号 |
WO9641316(A2) |
申请公布日期 |
1996.12.19 |
申请号 |
WO1996US10247 |
申请日期 |
1996.06.07 |
申请人 |
KRAVITZ, DAVID, W.;GEMMELL, PETER, S.;BRICKELL, ERNEST, F. |
发明人 |
KRAVITZ, DAVID, W.;GEMMELL, PETER, S.;BRICKELL, ERNEST, F. |
分类号 |
G06Q20/00;G07F7/08 |
主分类号 |
G06Q20/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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