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:
Feb. 11, 2025
Filed:
Jun. 10, 2022
Huawei Technologies Duesseldorf Gmbh, Duesseldorf, DE;
Huawei Technologies Duesseldorf GmbH, Duesseldorf, DE;
Abstract
A Certification Authority (CA) server for issuing digital certificates generates a first digital certificate associated with a first public key of the device and calculates an update factor for the first private key. Based on the first public key, the calculated update factor, and a predefined public system parameter, the CA server calculates a second public key for a determined time period for the device. The CA server generates a second digital certificate valid at the determined time period and associated with the second public key and sends the second digital certificate to the device. A device may calculate an update factor for a stored first private key, calculates a second private key based on the calculated update factor and the first private key, receives from the CA server a second digital certificate associated with a second public key, and validates the device based on the second digital certificate.