EV Charging ECU Certificate Reissue for Accurate Authentication
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Solution Overview
Problem
Existing vehicle authentication systems fail to prevent a user from being incorrectly authenticated as a different user when an ECU is transferred between vehicles without deleting certificate data, leading to potential misuse of charging services.
Innovation Solution
A management server manages certificate data by transmitting commands to delete and reissue certificate data when a vehicle's ECU is mounted on a different vehicle, ensuring authentication accuracy and convenience by updating the database with new certificate data without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If certificate data is stored in an ECU without deletion when the ECU is transferred to a different vehicle, then the ECU can be reused without reissuance overhead, but the user authentication accuracy deteriorates because the ECU may be authenticated as a different user
Solution Approach 1:
The management server performs preliminary verification by checking whether the combination of vehicle identification information and ECU identification information exists in the database before allowing ECU reuse. This preliminary action prevents authentication errors by ensuring the ECU is properly associated with its new vehicle before certificate data is used for authentication.
Solution Approach 2:
The management server implements a feedback mechanism that monitors ECU usage across different vehicles. When the server detects that an ECU is being used in a vehicle different from the one registered in the database, it triggers appropriate actions such as deleting existing certificate data or reissuing new certificates, thereby maintaining authentication accuracy while enabling ECU reuse.
2Measurement precision
If the management server deletes certificate data from the ECU when vehicle-ECU combination is not found in the database, then authentication accuracy is improved, but the system complexity increases due to additional verification and command transmission processes
Solution Approach 1:
The management server integrates multiple functions into a single centralized system: database management, ECU verification, certificate data deletion, and reissuance coordination. This multi-functional approach simplifies the overall system architecture by consolidating complexity in one manageable component rather than distributing it across multiple systems.
Solution Approach 2:
The management server automatically performs verification of vehicle-ECU combinations and executes certificate data deletion or reissuance without requiring manual user intervention. This self-service capability maintains high authentication accuracy while reducing operational complexity by eliminating the need for user-side verification procedures.
3Ease of operation
If the management server automatically requests certificate data reissuance from the service server, then user convenience is improved by eliminating manual reissuance operations, but the loss of time increases due to additional communication and processing steps
Solution Approach 1:
The management server initiates certificate data reissuance automatically as a preliminary action immediately when it detects the need for reissuance. By performing this action before the user would otherwise need to request it, the system eliminates manual operations while minimizing time loss through proactive automation rather than reactive processing.
Solution Approach 2:
The management server maintains continuous monitoring of ECU usage and automatically triggers reissuance processes without interrupting user operations. This continuous action ensures that certificate data is renewed seamlessly in the background, providing user convenience while optimizing timing to minimize disruption and time loss.
Data Source
AI summary
The management server includes a memory and a processor. In addition to the certificate data, the memory stores vehicle identification information for identifying the vehicle and ECU identification information for identifying an ECU mounted on the vehicle when the certificate data is issued. The processor communicates with a specific vehicle on which ECU is mounted to obtain specific vehicle identification information for identifying the specific vehicle and ECU identification information, and executes an acquisition process of transmitting, to the specific vehicle, a first command for deleting the certificate data stored in ECU in a first instance in which the combination of the specific vehicle identification information and ECU identification information acquired from the specific vehicle is not stored in the memory.