Patent ID: 6804730
Filing Date: 2004-10-12
Classification: G06F

Abstract:
An access control device connected to:a storage device which stores and supplies data in response to access, and comprises a certification data storage area for rewritably storing certification data; and an access device which has functions of outputting input certification data, and at least one of a storage device access command or a setting change command instructing rewriting of certification data, and a function of obtaining read-out data supplied in accordance with the access command; said access control device receiving the input certification data output by said access device, determining whether the certification input data coincides with the certification data stored in said certification data storage area, and allowing acceptance of the access command and the setting change command output by said access device when determining that the input certification data coincides with the certification data; receiving the access command or the setting change command output from said access device while the acceptance of the access command and the setting change command is allowed; accessing said storage device in accordance with the received access command, and supplying the read-out data obtained from said storage device in accordance with this accessing to said access device; and obtaining new certification data output from said access device in accordance with the received setting change command, and rewriting the certification data stored in said certification data storage area into the new certification data obtained from said access device.