Server for issuing a digital certificate and device for verifying authentication
US12225000B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2022 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Apr 13, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3066
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.