Communication device, certificate authority device, and recording medium
US10848324B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2018 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Apr 11, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An HEMS controller receives a certificate revocation list distributed from a certificate authority server and listing serial numbers of revoked electronic certificates. The serial number of the electronic certificate includes a first identifying part that indicates a value for identifying a type of a participation node maintaining the electronic certificate and a second identifying part that indicates a value for identifying an individual participation node. In the case the certificate revocation list includes a serial number in which the second identifying part is a predetermined value, the HEMS controller determines that the electronic certificate of a participation node that meets the type indicated by the first identifying part of the serial number is invalid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.