Information recording medium, manufacturing method of its recording medium, information process unit and copyright management system
AssigneeFuji Electric Device Technology Co., Ltd.
InventorTeruhisa Yokosawa
Life of this patent
Estimating the term…
Abstract
Medium individual information formed an information recording medium is obtained, and a management key used for recording or regeneration on the information recording medium corresponding to the medium individual information is generated, and the predetermined information is encoded to create encode data by using the management key when recording predetermined information, the encode data recorded on the information recording medium is decoded to create decode data by using the transferred management key when regenerating the predetermined information.
Claims22
An information recording medium capable of magnetic recording and regenerating information, the medium comprising:
- a data area for recording data information;
- and
- a concave portion having a bottom surface for recording medium individual information including at least one bit of digital information,
- wherein the bottom surface of the concave portion is formed at a lower position than the position of the data area,
- wherein the medium individual information is recorded in the bottom surface such that a recording position of the bottom surface is located lower than the recording position of the data area, and
- wherein the recorded medium individual information in the bottom surface can be regenerated but cannot be rewritten as a part of an unprotected key of digital information including an individual number or an individual data for identification of the medium.
An information recording medium capable of magnetic recording and regenerating information, the medium comprising:
- a data area for recording data information;
- and
- a concave portion having a bottom surface for recording medium individual information including at least one bit of digital information,
- wherein the bottom surface of the concave portion is formed at a lower position than the position of the data area,
- wherein the medium individual information is recorded in the bottom surface such that a recording position of the bottom surface is located lower than the recording position of the data area, and
- wherein the recorded medium individual information is read and is encrypted by an information process unit, and the encrypted medium individual information is transferred to a management server and is used for encrypting digital information, and further the encrypted digital information is transferred to the information process unit and is decrypted using the medium individual information.
Dependencies are inferred from the claim text.