Electronic Key Registration System with Time-Limited Verification
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Solution Overview
Problem
Existing electronic key registration systems face challenges in preventing unauthorized registration and rewriting of electronic key information, which can lead to security breaches and misuse.
Innovation Solution
An electronic key registration system that employs a verification ECU connected to a bus in the vehicle, using bidirectional communication and challenge-response verification with a SEED registration technique to securely register and manage electronic keys, with time-limited registration periods to prevent unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electronic key registration is allowed without time limitation, then ease of operation is improved, but security is worsened due to unauthorized registration risk
Solution Approach 1:
The system performs preliminary actions by setting a registration valid period before unauthorized registration can occur. The control device checks whether the current time falls within the valid period before allowing registration, preventing unauthorized registration attempts outside the authorized time window.
Solution Approach 2:
The registration validity is made dynamic through time-based control. The control device dynamically checks the current time against the stored valid period and adjusts registration acceptance accordingly, transitioning from static unlimited registration to dynamic time-limited registration.
2Reliability
If bidirectional communication verification is implemented, then security is improved, but device complexity increases
Solution Approach 1:
The system implements feedback through bidirectional communication where the control device sends challenge data to the electronic key, receives response data, verifies it against expected values, and provides feedback by either accepting or rejecting the registration. This closed-loop verification enhances security while maintaining manageable complexity through structured interaction protocols.
Data Source
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AI summary
An electronic key registration system (16) registers a key ID and an encryption key (Kcr) of an electronic key (2) to a controller (4) installed in a communication subject (1) that communicates with the electronic key (2) through wireless connection. The electronic key (2) includes a monitoring unit (23, 26) that monitors whether or not registration of the electronic key (2) is attempted in a permissible period. A registration invalidation unit (25, 28) prohibits registration of the electronic key (2) to the communication subject (1) when the permissible period expires.