发明名称 |
Electronic transaction system |
摘要 |
An electronic transaction in which in order to improve a reliability of message certification by digital signature and enable the use of the digital signature in a formal transaction in place of conventional signature or seal, the following procedures are implemented utilizing the fact that, in a public key cryptograph system represented by an RSA system, a first encoded message derived by encoding a first decoded message by using a public key of a first transacting party is equal to a second encoded message derived by encoding a second decoded message by using a public key of a second transacting party: (a) Check sender/receiver; (b) Add content certification function; (c) Double check the person by the possession of a secret key and the response by a terminal; (d) Add a grace period to the electronic seal; and (e) Send back a tally impression from the receiver to the sender. |
申请公布号 |
US4885777(A) |
申请公布日期 |
1989.12.05 |
申请号 |
US19880180050 |
申请日期 |
1988.04.11 |
申请人 |
HITACHI, LTD. |
发明人 |
TAKARAGI, KAZUO;SASAKI, RYOICHI;SHIRAISHI, TAKAYOSHI;KURASHIKI, NOBUHIRO |
分类号 |
G06Q20/00;G07F7/10;H04L9/32 |
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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