Vehicle Diagnostic Key Rotation to Prevent Replay Attacks
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Solution Overview
Problem
Current vehicle diagnostic methods rely on a single, preset diagnostic key for both the diagnostic apparatus and the vehicle, leading to security vulnerabilities and potential data breaches.
Innovation Solution
Implement a system where a diagnostic authorization apparatus generates and encrypts unique diagnostic keys for each diagnostic session using public-key cryptography, ensuring that different keys are used for each diagnostic interaction, thereby enhancing security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a same diagnostic key is preset in the diagnostic apparatus and the vehicle, then the diagnostic process is simple and easy to operate, but the security of the diagnostic key is low and vulnerable to replay attacks
Solution Approach 1:
The patent implements dynamic key generation where the diagnostic key changes with each diagnostic session. The authorization apparatus generates a new diagnostic key for each diagnostic request, and this key is temporarily valid only for that specific session. This dynamic approach prevents replay attacks while maintaining operational simplicity through automated key management.
Solution Approach 2:
The patent applies preliminary action by having the authorization apparatus generate and distribute diagnostic keys before the actual diagnostic process begins. The key is generated in advance for each diagnostic session, verified by both the diagnostic apparatus and vehicle, and then becomes valid for use. This preliminary key preparation ensures security is established before diagnostic operations commence.
2Reliability
If a unique diagnostic key is generated for each diagnostic session, then the security of vehicle diagnosis is enhanced, but the complexity of the diagnostic system increases
Solution Approach 1:
The patent introduces an authorization apparatus as an intermediary between the diagnostic apparatus and the vehicle. This intermediary is responsible for generating, managing, and distributing diagnostic keys. By centralizing key management in the authorization apparatus, the complexity of key generation and distribution is isolated from the diagnostic apparatus and vehicle, allowing them to focus on their primary diagnostic functions while maintaining high security through the intermediary's key management capabilities.
Data Source
AI summary
This application provides a vehicle diagnostic method, system, and apparatus, and an electronic device. In the method, a vehicle may execute a first diagnostic item in collaboration with a diagnostic apparatus based on a first diagnostic key, where the first diagnostic key corresponds to a first diagnostic instruction; and execute the first diagnostic item in collaboration with the diagnostic apparatus based on a second diagnostic key, where the second diagnostic key corresponds to a second diagnostic instruction, and the second diagnostic key is different from the first diagnostic key.