Information processing system, portable electronic device, access apparatus for the portable electronic device, and method of using memory space

US7150039B2 · kind B2 · utility

Assignee

• SONY GROUP CORPORATION · JP

Inventors

• Susumu Kusakabe · Tokyo, JP
• Masayuki Takada · Ebeye, US
• Masachika Sasaki · Yokohama, JP

Key dates

• Filing date: Jan 4, 2001
• Grant date: Dec 12, 2006
• Expiry date: Jun 11, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G06Q20/3672
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

The invention provides an information processing system, a portable electronic device, an access apparatus for the portable electronic device, as well as a method of using a memory space. When applied to, for example, a system employing non-contact IC cards, the invention enables one IC card to be used for a plurality of business organizations in common. To this end, an access key is created based on issuer key information managed by a management sector and file key information specific to each business organization, and the created access key is signed to the business organization. A portable electronic device is then accessed using the access key.