Open processor for operation technology and internet of things
US11177934B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2019 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Dec 27, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3297
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A computing device comprises a network element configured for receiving messages sent over a network from a control facility, a reduced instruction set computer processing circuitry comprising a central processing unit (CPU) and a secure hardware-implemented module adapted to verify that a signed PKI message is encoded in the received messages at a plurality of sequential intervals and to either switch the CPU from an operational state to a safe state, or prevent switching of the CPU from the safe state to the operational state, when a receipt of a signed PKI message is not verified in one of the sequential intervals. In the operational state, the CPU accesses a memory address space in the processing circuitry for executing software-based commands. In the safe state the CPU is prevented from executing the software-based commands while access to the memory address space is retained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.