Vehicle Control System Attack Judgment via Communication Period Comparison
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Solution Overview
Problem
Existing vehicle control systems face increased network load due to communication for message authentication, which hampers the ability to effectively judge communication abnormalities such as attacks on in-vehicle networks from external sources.
Innovation Solution
A vehicle control system that includes a comparing section at each control device to compare communication periods with a stored reference period, allowing for attack judgment without relying on message authentication, and an independent communication path for secure high-risk information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If message authentication is carried out on all communications, then security against attacks is improved, but network load increases
Solution Approach 1:
The patent applies different authentication methods to different communication scenarios: MAC-based authentication is used for high-risk communications (first type of information) while communication period comparison is used for other communications (second type of information). This local differentiation optimizes security where needed while reducing network load elsewhere.
Solution Approach 2:
The patent segments authentication into two distinct mechanisms: MAC authentication for critical communications and communication period comparison for routine communications. This segmentation allows the system to apply authentication overhead only where necessary, balancing security requirements with network efficiency.
2Productivity
If communication period comparison is used for attack detection, then network load is reduced, but detection accuracy for all attack types may be compromised
Solution Approach 1:
The patent applies different detection methods to different information types: MAC verification provides high-precision detection for high-risk information while communication period comparison provides efficient detection for other information, optimizing both accuracy and network load.
Solution Approach 2:
The patent uses MAC authentication selectively only for high-risk information rather than all communications, applying excessive security only where necessary. This partial application of rigorous authentication maintains detection accuracy for critical communications while reducing overall network load.
Data Source
AI summary
A vehicle control system comprising: a driving control device that includes a first processor and controls a driving section at a vehicle; a control instructing device includes a second processor and controls the driving control device by giving instructions by communication to the driving control device; and a communication path connects a plurality of control devices, including the control instructing and the driving control devices, the plurality of control devices communicate with one another, wherein the vehicle control system is structured wherein the first and second processors respectively compare a communication period of communication with another control device via the communication path, and a reference period that is stored in advance, based on results of comparisons on the communication period and the reference period that have been carried out by the first processor and the second processor, the second processor judges that there is an attack on the communication path.