IC card and access control method

US7814557B2 · kind B2 · utility

Assignees

• NTT DOCOMO, INC. · JP
• Ken Sakamura · JP
• Noboru Koshizuka · JP

Inventors

• Ken Sakamura · Tokyo, JP
• Noboru Koshizuka · Musashino, JP
• Kazuhiko Ishii · Yokohama, JP
• Masayuki Terada · Joyo, JP
• Kensaku Mori · Ozu, JP
• Sadayuki Hongo · Yokohama, JP

Key dates

• Filing date: Apr 21, 2005
• Grant date: Oct 12, 2010
• Expiry date: Apr 10, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2221/2153
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

A folder containing at least one file can be created in a file storage (17) in response to a folder creation request from an owner (30) of an IC card (10), and an access authority to the folder can be set as an access control list (18A) of the folder in response to an access authority setting request from the owner (30). Then access to the file is controlled not only on the basis of the access authority to the file set by an issuer of a voucher (issuer of the file), but also on the basis of the access authority to the folder set by the owner (30).