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:
Sep. 22, 2020
Filed:
Feb. 01, 2016
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventor:
Tomoki Takazoe, Kanagawa, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); H04L 9/08 (2006.01); H04L 9/32 (2006.01); G06F 21/44 (2013.01);
U.S. Cl.
CPC ...
H04L 63/0823 (2013.01); G06F 21/445 (2013.01); H04L 9/08 (2013.01); H04L 9/32 (2013.01); H04L 9/3263 (2013.01); H04L 63/068 (2013.01); H04L 63/0869 (2013.01);
Abstract
A controller and a device generate a shared key by performing mutual authentication using a public key certificate of the controller and a public key certificate of the device. The controller and the device set an expiry for the shared key to one of the expiry of the public key certificate of the controller and the expiry of the public key certificate of the device. The controller and the device perform the mutual authentication using neither the public key certificate of the controller nor the public key certificate of the device, but the shared key, if the expiry set for the shared key has not passed.