ANONYMITY SERVICE PROVISION METHOD, AND SERVER DEVICE AND PROGRAM REALIZING THIS METHOD

摘要

PROBLEM TO BE SOLVED: To keep anonymity of a user high by preventing easy specification of correspondence relation between the user and account identification information issued by a service server.

SOLUTION: When registering new use of the user, correspondence relation between a newly produced service server account ID and a cooperation server account ID is changed between ID cooperation information of the user and ID cooperation information of another user stored in an information storage part 23 in a cooperation server RSV before the user starts use of service. By periodically executing the exchange process of the account IDs between the ID cooperation information of a plurality of users stored in the information storage part 23 in the cooperation server RSV during standby, the correspondence relation between the service server account ID and the cooperation server account ID is changed.

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