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:
May. 09, 2006
Filed:
Jun. 02, 2000
Naoki Kobayashi, Tokyo, JP;
Yuji Satou, Machida, JP;
Hideaki Kurata, Kokubunji, JP;
Kunihiro Katayama, Chigasaki, JP;
Takayuki Kawahara, Higashiyamato, JP;
Naoki Kobayashi, Tokyo, JP;
Yuji Satou, Machida, JP;
Hideaki Kurata, Kokubunji, JP;
Kunihiro Katayama, Chigasaki, JP;
Takayuki Kawahara, Higashiyamato, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
There is provided semiconductor memory capable of reconfiguring an area to be given an authentication key and access limitation, and there is implemented an information distribution system having an advanced security function using the semiconductor memory. Part of a storage area in the semiconductor memory stores information about the area to be given the authentication key and the access limitation. Alternatively, the authentication key is stored in units of data to be authenticated for limiting an access to stored information. Information is protected doubly by storing encrypted information in the area provided with the access limitation according to the above-mentioned method.