Patent ID: 8336059

Claim:
An access right checking method for conducting an access right check on a request destination OS (Operating System) according to a right of a subject executed on a requester OS when the subject issues an access request to access the object, the access right checking method comprising: a first step of, in response to the access request to access the object from the subject, causing proxy means on the request destination OS to issue a secondary access request wherein the subject is an access main body on the requester OS and the object is an access target on the request destination OS; a second step of causing the request destination OS to acquire the subject information on the subject from the requester OS when the secondary access request is issued at the first step; a third step of causing the request destination OS to convert the acquired subject information on the subject to secondary subject information having same format as original subject information on the proxy means; and a fourth step of causing the request destination OS to check whether the subject has a right to access the object based on the secondary subject information and on object information on the object.