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:
Nov. 17, 2009
Filed:
Feb. 22, 2005
Yoichiro Iino, Tokyo, JP;
Yoichiro Iino, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A data communicating method is disclosed for use with a user terminal, the method preventing both members of a given group including the terminal and nonmembers from intercepting, tampering with or falsifying data communicated between the members without recourse to a plurality of encryption keys. In a first step, validity verification data is generated by the terminal. In a second step, the validity verification data and an attestation identity public key certificate are sent from the terminal to a group management device. In a third step, the group management device determines whether the terminal is valid. If the terminal is found valid, then a group name, a member ID and a group-shared key are supplied to the terminal in a fourth step, and a member ID list is further supplied in a fifth step. Thereafter the terminal is allowed to communicate with other members of the same group. The disclosed method can be applied advantageously to video game machines for network-based games.