Vehicle-External Device Authentication for Driving Level Validation
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Solution Overview
Problem
Determining the system-wide driving automation level of an automated driving system, including an external device attached to a vehicle, is challenging due to varying levels of automation that can change depending on the external device used.
Innovation Solution
An authentication method involving a vehicle and an external device, where the vehicle holds a first certificate and the external device holds a second certificate, validates a third certificate for the combination using the result of device authentication between them, ensuring appropriate determination of the system-wide driving automation level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an external device is attached to enhance the automated driving system, then the driving automation level can be improved, but the complexity of determining system-wide automation level increases
Solution Approach 1:
The patent segments the authentication system into distinct certificate types: a first certificate for the vehicle, a second certificate for the external device, and a third certificate for their combination. This segmentation allows independent validation of each component while managing the complexity of system-wide authentication.
Solution Approach 2:
The patent introduces a certificate validation mechanism as an intermediary that mediates between the vehicle and external device. The validation process uses the first and second certificates to generate and verify a third certificate, serving as a mediator that confirms the combined system's automation level without requiring direct complex interaction between all system components.
2Reliability
If device authentication is performed between vehicle and external device, then system security is improved, but the authentication process complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring the vehicle with a first certificate and the external device with a second certificate before they interact. This allows the authentication process to proceed efficiently by validating pre-established credentials rather than creating security credentials in real-time, reducing the complexity of the authentication process while maintaining high security.
Solution Approach 2:
The patent uses certificate copying where the third certificate (certifying the combination) is generated based on the first and second certificates. This copying mechanism allows the system to validate the combined authentication state without requiring complex multi-party cryptographic protocols, simplifying the authentication process while ensuring security.
Data Source
AI summary
An authentication method is used by an automated driving system that includes a vehicle and an external device, the external device communicating with the vehicle to cause the vehicle to implement automated driving. The vehicle holds a first certificate that certifies validity of the vehicle. The external device holds a second certificate that certifies validity of the external device. The authentication method includes: validating a third certificate that certifies validity of a combination of the vehicle and the external device, in accordance with a result of device authentication performed between the vehicle and the external device by reference to the first certificate and the second certificate.