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:
Jul. 12, 2011
Filed:
May. 29, 2007
Yutaka Murakami, Kyoto, JP;
Yutaka Murakami, Kyoto, JP;
Nintendo Co., Ltd., Kyoto, JP;
Abstract
A storage means which can be accessed by an authentication apparatus stores content data, a first digest table including primary digest values corresponding to a plurality of data portions constituting the content data, a second digest table including secondary digest values corresponding to a plurality of data portions of the first digest table, and a digital signature generated from the second digest table. In a first reading step, the second digest table and the digital signature are read out from the storage means into a memory of the authentication apparatus. In a first authentication step, the authenticity of the content data is verified using the digital signature read out into the memory and the second digest table read out into the memory.