Safety circuit for an elevator system, device and method of updating such a safety circuit
US11080429B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 2019 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Jan 31, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/0823
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of updating at least one security certificate of a safety circuit of an elevator system includes: connecting the safety circuit with a communicator which is capable to communicate with a certification server; sending from the communicator to the safety circuit a security certificate update request for updating at least one security certificate stored within the safety circuit; the safety circuit sending a public key of a safety circuit security certificate associated with the safety circuit via the communicator to the certification server; the certification server checking whether the safety circuit security certificate associated with the received public key is included in a data base of known security certificates and not marked as compromised.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.