Required side distributed ID management device, offer side distributed ID management device, distributed ID management system and offer side distributed ID management manner

摘要

A requester-side distributed ID management device (11) includes: an ID managing unit (111) that holds first user identification information associated with first server identification information, the first user identification information being for identifying the user of a first service providing server (12); an ID request processing unit (114) that receives a request from the first service providing server (12) for management user identification information for identifying the user of the second ID management device (21), the user corresponding to the first user identification information; and an inter-domain cooperating unit (113) that requests the management user identification information received by the ID request processing unit (114) from the second ID management device (21), and acquires the management user identification information from the second ID management device (21). The ID request processing unit (114) transmits the management user identification information acquired by the inter-domain cooperating unit (113) to the first service providing server (12).