Vehicle Battery Software Reset With Digital Key Verification
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Solution Overview
Problem
Existing vehicle battery management systems face challenges in simultaneously protecting against malicious software and allowing software reset as per regulatory requirements, which are conflicting and difficult to harmonize.
Innovation Solution
A digital key verification system is implemented in vehicle electrical energy storage systems, where processing circuitry sends a verification request and limits system use if the key is not verified correctly, and includes a software reset function to delete the key and access protection module, allowing third-party software downloads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital key verification is implemented to protect against malicious software, then software security is improved, but software reset capability deteriorates
Solution Approach 1:
The system segments the key management into two distinct digital keys: a first digital key for vehicle-specific software verification and a second digital key for software reset operations. This segmentation allows the system to maintain security verification while enabling authorized software resets by different operators using different keys.
Solution Approach 2:
The patent introduces an intermediary software reset function that acts as a mediator between the security verification system and the software update process. This function can selectively remove the first digital key verification requirement, allowing authorized third-party software to be installed without compromising the overall security architecture.
2Reliability
If strict digital key verification is enforced to ensure software authenticity, then software integrity is improved, but system flexibility deteriorates
Solution Approach 1:
The system dynamically adjusts its verification requirements based on the operational context. The software reset function can temporarily modify the verification process by removing the first digital key requirement when authorized, allowing flexible software updates while maintaining security for normal operations.
Solution Approach 2:
The system changes the verification parameter (digital key requirement) based on the operational mode. During normal operation, strict verification is enforced; during authorized software reset operations, the verification parameter is modified to allow third-party software installation.
3Reliability
If software access protection module is implemented to prevent unauthorized access, then security protection is improved, but software update capability deteriorates
Solution Approach 1:
The access protection is segmented into multiple layers with different authorization levels. The first digital key provides vehicle-specific protection, while the second digital key enables authorized software resets. This segmentation allows security protection to coexist with authorized software updates.
Solution Approach 2:
The software reset function serves as an intermediary that can temporarily bypass the first digital key verification when properly authorized. This intermediary mechanism maintains security protection while enabling necessary software updates and repairs by authorized personnel.
Data Source
AI summary
A computer system of a vehicle has processing circuitry to send a verification request message to an electrical energy storage system of the vehicle, receive a response message from the electrical energy storage system that depends on the existence of a correct digital key in a memory of the electrical energy storage system; when the digital key is correctly verified, allow electrical systems of the vehicle to use the electrical energy storage system, when the digital key cannot be correctly verified, limit the use of the electrical energy storage system for the electrical systems of the vehicle.