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:
Aug. 03, 2021
Filed:
Oct. 01, 2019
Applicant:
Fujitsu Limited, Kawasaki, JP;
Inventors:
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); H04L 9/08 (2006.01); H04L 9/32 (2006.01); H04L 9/14 (2006.01); H04W 12/08 (2021.01); H04W 12/069 (2021.01); H04W 12/0433 (2021.01);
U.S. Cl.
CPC ...
H04L 9/0822 (2013.01); H04L 9/14 (2013.01); H04L 9/3247 (2013.01); H04L 9/3263 (2013.01); H04L 9/3271 (2013.01); H04L 63/0823 (2013.01); H04W 12/0433 (2021.01); H04W 12/069 (2021.01); H04W 12/08 (2013.01);
Abstract
A key generation apparatus includes a memory, a communication interface, and a processor. The memory stores a first private key corresponding to a first public key. The communication interface communicates with a peer apparatus that stores the first public key. The processor generates a second public key and a second private key in response to a key update request from the peer apparatus, generates a digital signature by encrypting data including the second public key with the first private key, and sends a message including the data and the digital signature to the peer apparatus. In addition, the processor switches the first private key to the second private key.