| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for token certification for a key managing system. SOLUTION: At a token certification box, it is decided that a master key is valid is a logically safe area, the proof on the completeness of transaction information is certified at the token certification box while using the master key, and the instruction of the certified result concerning the proof on the completeness of transaction information is outputted from the token certification box. The recording of master key includes the identifier of logical device, master key and digital signature for relating the identifier of logical device with the master key. Concerning this method, the relation between the identifier of logical device and the master key inside the logically safe area is certified by checking the digital signature. |
