| 摘要 |
PROBLEM TO BE SOLVED: To overcome such a problem that, when a user, or a member of a trust evaluation organization, intends to transact in another trust evaluation organization, the user cannot use the trust information accumulated in a site, where he/she pertains to, for another site, which possibly misses a transaction chance of the user. SOLUTION: A joint ownership certificate of the trust information prepared by a second community server is obtained beforehand for converting first evaluation information formed by a first community server for its member into second evaluation information formed by the second community server. Then, the evaluation expressed by the first evaluation information is converted into the evaluation in the second evaluation information based on the joint ownership certificate of the trust information. |
