Patent ID: 8065516
Filing Date: 2011-11-22
Classification: G06F

Abstract:
1. An information recording system comprising a magnetic disk drive and host side equipment, wherein: said magnetic disk drive comprises a storage unit to store first certificate information corresponding to a root key of a certification organization; said host side equipment acquires the first certificate information stored in the magnetic disk drive to authenticate the magnetic disk drive on the basis of the first certificate information, and then transmits, to the magnetic disk drive, second certificate information that is set beforehand in the host side equipment; said magnetic disk drive authenticates the host side equipment by use of the second certificate information of the host side equipment; and wherein: a first encryption key of the plurality of shared encryption keys differs from a second encryption key of the plurality of shared encryption keys; wherein the first encryption key encrypts the information relating to the license of data when the information relating to the license of data is written to the magnetic disk drive, and the second encryption key encrypts the information relating to the license of data when the information relating to the license of data is read from the magnetic disk drive.