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. 19, 2013
Filed:
Mar. 30, 2011
Kenji Yamada, Kawasaki, JP;
Tadashige Iwao, Kawasaki, JP;
Hidefumi Takaoka, Fukuoka, JP;
Syunsuke Koga, Fukuoka, JP;
Kenji Yamada, Kawasaki, JP;
Tadashige Iwao, Kawasaki, JP;
Hidefumi Takaoka, Fukuoka, JP;
Syunsuke Koga, Fukuoka, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A communication apparatus includes an encryption key generation unit that generates encryption key information at constant encryption key generation intervals, a common key generation unit that generates common key information uniquely with respect to a generation time at common key generation intervals set longer than the encryption key generation intervals, a common key application unit that performs encryption or decryption of the encryption key information by using the common key information, and an encryption key distribution unit that makes a request to a data transmitting/receiving unit to distribute the encryption key information to a plurality of communication apparatuses to be communicated simultaneously at encryption key distribution intervals set shorter than the encryption key generation intervals to perform communication with higher security.