| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a system which can reduce load on a service provider and can easily mount a mobile terminal in the case of transmitting/receiving safe information among a normal terminal, the mobile terminal and a service providing apparatus. <P>SOLUTION: A mobile terminal application apparatus for converting signature data for the mobile terminal which includes an attribute certificate into signature data for a normal terminal is arranged between the mobile terminal and the service providing apparatus and a part to be signed in the signature data is provided with a structure in which a public key certificate and an attribute certificate are not included. In the case of the mobile terminal by which the attribute certificate cannot be safely managed, the mobile terminal application apparatus acquires the attribute certificate from an attribute certificate authority and adds the acquired attribute certificate to the signature, so that the safely managed attribute certificate can be acquired. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
