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. 31, 2005
Filed:
Feb. 15, 2001
Ryuichi Okamoto, Studio City, CA (US);
Mitsuhiro Inoue, Studio City, CA (US);
Hideki Matsushima, Studio City, CA (US);
Ryuichi Okamoto, Studio City, CA (US);
Mitsuhiro Inoue, Studio City, CA (US);
Hideki Matsushima, Studio City, CA (US);
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
A semiconductor memory card which allows consumers to access and purchase content while protecting the copyright of the content. The memory card has a unique media ID assigned thereto and includes a secure data area and a non-secure data area. The secure are is accessible by an apparatus whose authenticity is verified, and the non-secure area is accessible by the apparatus regardless of such verification. The secure area stores a first encrypted content which is generated by encrypting a first content key by using the media ID, and the non-secure data area stores trial data and purchase data which can be decrypted. The trial data includes a first content which is encrypted by using the first content key, and the purchase data includes a second content which is encrypted by using a second content key. The purchase data can be decrypted when fee processing is performed.