Method and system for detecting message injection anomalies
US11711384B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2018 |
| Grant date | Jul 25, 2023 |
| Priority date | — |
| Expiry date | Oct 25, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1466
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for detecting illegitimate messages injected into legitimate messages of a bus, such as a Controller Area Network (CAN) bus, are provided. Legitimate messages are broadcasted over the bus with a period whereby the legitimate messages are periodic legitimate messages. A controller connected to the bus receives at a first time instant a first message from the bus and receives at a second time instant a second message from the bus. The controller compares a first difference in time between the second time instant and the first time instant with a limit. The limit is two-thirds of the period. An anomaly is detected when the first difference in time is less than the limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.