In the example of the invention, an accepting section of a privilege management system accepts privilege coupon data and a right data acquisition request. The privilege coupon data includes permitting side condition ID which specifies a utilization permitting side which permits granting a privilege. The acquisition request includes a utilizing side ID indicative of a right data utilizing side. The verifying section determines that the privilege is granted to the requesting side when the permitting side condition ID is consistent with the utilizing side ID. The service section grants the privilege to the requesting side when it is determined that the privilege is granted.