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. 12, 2011
Filed:
Oct. 30, 2007
Communication method, communication system, key management device, relay device and recording medium
Shingo Fujimoto, Kawasaki, JP;
Ryuichi Matsukura, Kawasaki, JP;
Motoshi Sumioka, Kawasaki, JP;
Satoshi Okuyama, Kawasaki, JP;
Shingo Fujimoto, Kawasaki, JP;
Ryuichi Matsukura, Kawasaki, JP;
Motoshi Sumioka, Kawasaki, JP;
Satoshi Okuyama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A key management device for communicating with relay devices is provided, and one of the relay devices, which is communicating with a communication device based on master key information, transmits the master key information to the key management device. If the communication with the communication device has been enabled, the other relay devices makes a request to the key management device for transmission of the master key information. Then, the key management device transmits the master key information, which has been received from the one of the relay devices, to the other relay device, and then the other relay device can communicates with the communication device using the received master key information.