The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2003
Filed:
Apr. 24, 2000
Teruto Hirota, Moriguchi, JP;
Makoto Tatebayashi, Takarazuka, JP;
Taihei Yugawa, Nara, JP;
Masataka Minami, Burbank, CA (US);
Masayuki Kozuka, Arcadia, CA (US);
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
A semiconductor memory card comprising a control IC , a flash memory , and a ROM . The ROM holds information such as a medium ID unique to the semiconductor memory card. The flash memory includes an authentication memory and a non-authentication memory . The authentication memory can be accessed only by external devices which have been affirmatively authenticated. The non-authentication memory can be accessed by external devices whether the external devices have been affirmatively authenticated or not. The control IC includes control units and , an authentication unit and the like. The control units and control accesses to the authentication memory and the non-authentication memory , respectively. The authentication unit executes a mutual authentication with an external device.