| 摘要 |
PROBLEM TO BE SOLVED: To automatically update a route key to be used for confirming the correctness of a digital certificate in authentication processing in a client/server system. SOLUTION: The update procedure for updating the router key to be stored in each of nodes comprising the client/server system is determined to include the step of performing processing for simultaneously transmitting a new route key for updating or the digital certificate in which contents can be confirmed by using the new route key, in order for each target node. The performance order is created as a work list and while successively changing a concerned node, with respect to each of low-order nodes of the concerned node, the low-order node is added to the end of the work list when functioning the concerned node as a client with the low-order node as a communicating party (S407) and further, the work list is created by adding the low-order node to the top of the work list when functioning the concerned node as a server (S406). The low-order node can also be added behind the concerned node in place of the end or can also be added before the concerned node in place of the top. COPYRIGHT: (C)2005,JPO&NCIPI
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