| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and device for providing the service of a service provider to a service user. <P>SOLUTION: When a user (1) has agreed with service provision, the user (1) enciphers at least one element of a message in which the service provision is included by his own private key, and returns the message to a service provider (2), and the service provider transfers the message to a service settler (3), and the service provider (2) receives confirmation prepared based on the check of the enciphered element by the service settler (3) from the service settler (3), and the service provider (2) enables a service to the user (1). <P>COPYRIGHT: (C)2003,JPO |
