ACCESS AUTHORIZATION TRANSFER DEVICE, SHARED RESOURCE MANAGEMENT SYSTEM AND ACCESS AUTHORIZATION SETTING METHOD

PROBLEM TO BE SOLVED: To easily realize assignment of a temporary access authorization and assignment of a specified type of access authorization to a device without access authorization to a hared resource. SOLUTION: A transfer client 2 issues an assignment authorization certificate 52 certificating temporary or definite transfer of access authorization to a management subject resource 13 by using an assignment authorization certificate issuing function 21, a transferred client 3 obtains the assignment authorization certificate 52 through an assignment authorization certificate storing function 32, and generates a digital agent signature which is an access request according to the obtained assignment authorization certificate 52 by a digital agent signature generating function 31. A resource management server 1 receives the digital agent signature, and verifies whether an access to the management subject resource by the transferred client 3 is properly requested or not through the digital agent signature verifying function 12 and an assignment authorization verifying function 11.