Tamper resistant device and file generation method

• US 20060214006A1
• Filed: 03/17/2006
• Published: 09/28/2006
• Est. Priority Date: 03/18/2005
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Ishii, Kazuhiko, Mori, Kensaku, Terada, Masayuki, Hongo, Sadayuki
• Granted Patent: US 7,500,605 B2
• Time in Patent Office: Days
• US Class Current: 235/492
• CPC Class Codes: G06F 21/62 Protecting access to data via a platform, e.g. using keys or access control rules
• CPC Class Codes: G06F 21/78 to assure secure storage of data address-based protection against unauthorised use of memory G06F12/14; record carriers for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: G06Q 20/045 using payment protocols involving tickets
• CPC Class Codes: G06Q 20/1235 with control of digital rights management [DRM]
• CPC Class Codes: G06Q 20/322 Aspects of commerce using mobile devices [M-devices]
• CPC Class Codes: G07F 17/42 for ticket printing or like apparatus , e.g. apparatus for dispensing of printed paper tickets or payment cards

Abstract

It is an object to provide a tamper resistant device and a file generation method which can store right value information such as a ticket information, and guarantee validity of the right value information without executing a digital signature processing.

An IC card 102 attached to a portable terminal 100 receives, from an application 101, right value information representing a right value and a file generation message instructing generation of a rights-file. The right value information includes file data representing the right value, data size and the like. Upon determining that a file generation message is received, the IC card 102 generates a rights-file including the IC card identification ID and right value information which are previously stored in the IC card 102.

Claims

1. A tamper resistant device which stores an identifier capable of uniquely identifying the tamper resistant device comprising:

a receiving means for receiving a file generation message including right value information representing a right value and instruction information which instructs generation of a rights-file including the right value information and the identifier;

a message determination means for determining whether or not the file generation message received by the receiving means includes right value information representing a right value and instruction information which instructs generation of a rights-file including the right value information and the identifier;

a file generation means for generating, if the message determination means determines that the file generation message received by the receiving means includes the right value information and the instruction information, a rights-file including the identifier and the right value information; and

a storage means for storing the rights-file generated by the file generation means.

2. A file generation method of a tamper resistant device which stores an identifier capable of uniquely identifying the tamper resistant device comprising:

a receiving step for receiving a file generation message including right value information representing a right value and instruction information which instructs generation of a rights-file including the right value information and the identifier;

a message determination step for determining whether or not the file generation message received by the receiving step includes right value information representing a right value and instruction information which instructs generation of a rights-file including the right value information and the identifier;

a file generation step for generating, if the message determination step determines that the file generation message received by the receiving step includes the right value information and the instruction information, a rights-file including the identifier and the right value information; and

a storing step for storing the rights-file generated by the file generation step.