ACCESS RIGHT MANAGEMENT SYSTEM, RELAY SERVER AND METHOD THEREFOR, AS WELL AS COMPUTER PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a system and a method for performing access restriction surely in communication through network. SOLUTION: As to communication among communication processing units through communication network, a relay server like a home server implements verification and examination of an attribute certificate of an access originator. The access originator implements determination processing of whether the accessing originator belongs to an authorized member of the access opponent. Only when the access originator belongs to the permitted one by the access opponent, name resolution processing is implemented, and address information of the access opponent is notified to the access originator. A group attribute certificate describing a domain name and a host name of the access originator is referred to, and update of address corresponding to the domain name and the host name is implemented in this constitution. COPYRIGHT: (C)2004,JPO