Patent ID: 7240369
Filing Date: 2007-07-03
Classification: G06F

Abstract:
1. An access control method for a plug and play device, wherein the plug and play device includes an access control device and a main function device, the access control method comprising the steps of: when the plug and play device is connected to a host, informing the host that the plug and play device includes only the access control device so as to hide the main function device and make the host unable to access the main function device; after the host is informed that the plug and play device includes only the access control device, coupling the access control device to the host and executing an authorization procedure between the access control device and the host; when the authorization procedure passes, informing the host that the plug and play device further includes the main function device and accepts control of the main function device by the host; and after the host is informed that the plug and play device further includes the main function device, enabling the main function device to be controlled by the host by loading a driver for the main function device at the host; wherein when the authorization procedure fails, the plug and play device rejects control by the host so as to hide the main function so that the host is unable to access the main device.