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. 10, 2012
Filed:
Jan. 11, 2011
Taro Kurita, Shinagawa-Ku, JP;
Taro Kurita, Shinagawa-Ku, JP;
Sony Corporation, Tokyo, JP;
Abstract
An IC card has a mechanism to securely manage information for each of a plurality of service providers in a memory area of the IC card. The IC card is shared by the plurality of service providers. File systems of the service providers are allocated in the memory area, and a single information recording medium is shared by the plurality of service providers. The memory area is separated into the file systems. A border between the file systems functions as a firewall, thus appropriately preventing one of the file systems from being intruded by the other file systems. Furthermore, by using a function of separating the memory area into a plurality of file systems together with a security code verification function of each file system, the security of each file system is independently managed.