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:
Oct. 03, 2023
Filed:
Jun. 06, 2019
Nidec Sankyo Corporation, Nagano, JP;
Kazuto Saeki, Nagano, JP;
NIDEC SANKYO CORPORATION, Nagano, JP;
Abstract
To provide a mutual authentication system which is not required to erase master key when a slave device is replaced. The storage part stores a temporary key which is key data used temporarily and a master key which is key data used for authentication. The storage part stores the temporary key. The key confirmation unit inquires whether the slave device stores the master key. The key confirmation response unit confirms whether the master key has already been stored in the storage part for an inquiry from the master device and responds. The key introduction unit encrypts the master key by using the temporary key and transmits to the slave device. The key storage unit decrypts the encrypted master key by using the temporary key and stores in the storage part. The main authentication unit and the sub-authentication unit authenticate with each other by using the master key.