Method for trusted booting of PLC based on measurement mechanism
US11093258B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2017 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Jun 13, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/05
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a method for trusted booting of PLC based on a measurement mechanism, comprising the following steps: a step of initializing self firmware verification; a step of reading and computing firmware information about a PLC; a step of checking and storing one by one; and a step of verifying at the operation start stage. In the method of the present invention, a chip with a trusted function is used as a core of hardware computation. The PLC extends a Flash bus for loading by hardware of the method of the present invention. The hardware of the method of the present invention recognizes necessary boot information, verifies the integrity of the boot loader necessary for the PLC system through the integrity check method and ensures that the booted PLC system is in a trusted state. On the basis of ensuring validity and feasibility for the safety of a terminal device, the present invention can build a safe and trusted industrial control system operating environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.