Electronic Key Registration via Segmented Encryption Logic
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Solution Overview
Problem
Existing electronic key registration systems face challenges in securing the encryption key from unauthorized acquisition, particularly during the registration process, which compromises the confidentiality and integrity of the communication.
Innovation Solution
The system employs an initial electronic key with an encryption key generation code and logic, stored in a controller, which generates and stores an initial encryption key, while an additional electronic key is registered using an information center that sends the additional encryption key through a network, ensuring secure communication by reducing direct transmission and using unique identification information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encrypted communication is used to transmit ID signals from electronic keys, then confidentiality of the ID signal is improved, but the security level against unauthorized acquisition of the encryption key is insufficient
Solution Approach 1:
The encryption key is divided into two parts: a seed key stored in the electronic key and an encryption key generation logic stored in the controller. The actual encryption key is dynamically generated by combining these two parts through a computation, preventing unauthorized acquisition of the complete encryption key.
Solution Approach 2:
An encryption key generation logic acts as an intermediary component that resides in the controller. This logic takes the seed key from the electronic key and transforms it into the encryption key through a computation, serving as a secure intermediary that prevents direct exposure of the encryption key.
2Ease of operation
If the encryption key is stored in the controller for registration, then ease of key management is improved, but the risk of unauthorized acquisition of the encryption key increases
Solution Approach 1:
The encryption key is segmented into a seed key (stored in electronic key) and generation logic (stored in controller). The controller stores only the generation logic, not the complete encryption key, reducing the impact of unauthorized acquisition while maintaining ease of key management through automated generation.
Solution Approach 2:
The encryption key generation logic is pre-stored in the controller during manufacturing. This preliminary action enables the controller to automatically generate the encryption key when needed without requiring manual input or storage of the complete key, balancing ease of management with security.
Data Source
AI summary
An electronic key registration system includes a controller of a communication subject, an initial electronic key that communicates with the communication subject and has an initial encryption key generation code, an additional electronic key that communicates with the communication subject, and an information center including an additional encryption key. The initial electronic key holds an initial encryption key generated from the initial encryption key generation code and a logic. The controller holds the logic and identification information of the communication subject. The controller acquires the initial encryption key generation code from the initial electronic key, generates an initial encryption key from the initial encryption key generation code and the logic held by the controller, and stores the initial encryption key. The information center sends the additional encryption key to the additional electronic key or the controller through a network.