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:
Feb. 28, 2007
Osamu Takata, London, GB;
Tadashi Kaji, Yokohama, JP;
Takahiro Fujishiro, Yokohama, JP;
Kazuyoshi Hoshino, Tokyo, JP;
Keisuke Takeuchi, Kunitachi, JP;
Osamu Takata, London, GB;
Tadashi Kaji, Yokohama, JP;
Takahiro Fujishiro, Yokohama, JP;
Kazuyoshi Hoshino, Tokyo, JP;
Keisuke Takeuchi, Kunitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An encrypted communication system is provided, in which an encryption key for use in encrypted communication and settings information for the encrypted communication are distributed to each of a plurality of communication devices performing encrypted communication within a group, and in which traffic generated by distributing the encryption key and the like can be reduced. In the encrypted communication system according to the present invention, information including a key for use in the intra-group encrypted communication or a seed which generates the key is distributed to the communication devices belonging to the group that are participating (e.g., logged in) in the intra-group encrypted communication.