Valet Key Distribution via NFC Authentication
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Solution Overview
Problem
The existing valet key distribution systems face challenges in convenience and security, particularly in offline environments where online access is not available, and there is a risk of unauthorized use due to the lack of physical key authentication.
Innovation Solution
A valet key distribution system utilizing near-field communication or dedicated short-range communication between a vehicle, an owner terminal, and a guest terminal, which securely transmits and authenticates key information to enable limited vehicle use without internet access, employing a vehicle-side and terminal-side storage and controller for secure key management and authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mobile terminal registration system is used to enable multiple terminals as vehicle keys, then ease of operation is improved, but security against unauthorized registration deteriorates during additional registration
Solution Approach 1:
The system performs preliminary authentication of the owner terminal to the vehicle before allowing any key distribution operations. The vehicle authenticates the owner terminal using pre-stored authentication information, and only after successful authentication does it permit the distribution of valet key information to guest terminals. This preliminary action ensures that only authorized owners can initiate key distribution, preventing unauthorized registration while maintaining ease of operation for legitimate users.
2Ease of operation
If physical valet keys are used to allow vehicle movement, then ease of operation is improved, but loss of information security deteriorates
Solution Approach 1:
The system creates digital copies of the valet key information and stores them in the guest terminal's storage unit. Instead of using a single physical key that could be lost or copied, the system generates and transmits encrypted valet key information to multiple guest terminals. Each terminal stores a copy of the key information, allowing secure distribution and removal of keys from the vehicle without physical contact, thus preventing information loss while maintaining operational ease.
3Ease of operation
If valet key information is transmitted to guest terminal, then ease of operation is improved, but security against unauthorized use deteriorates
Solution Approach 1:
The vehicle's authentication unit acts as an intermediary between the owner terminal and the guest terminal. Before transmitting valet key information to the guest terminal, the system first authenticates the owner terminal to the vehicle using authentication information stored in the vehicle. This intermediary authentication step ensures that only authorized owners can initiate key distribution, while the actual key transmission to the guest terminal occurs only after successful authentication, thus maintaining both ease of operation and security against unauthorized use.
4Adaptability or versatility
If multiple mobile terminals are registered as vehicle keys, then adaptability is improved, but device complexity deteriorates
Solution Approach 1:
The system segments the key management function by separating authentication authority from key storage. The vehicle's authentication unit handles authentication operations, while individual guest terminals store only their specific valet key information locally in their storage units. This segmentation allows multiple terminals to be registered and used independently without requiring complex centralized management or inter-terminal communication, thus improving adaptability while keeping individual device complexity low.
Data Source
AI summary
A valet key distribution system distributes key information of a vehicle among the vehicle, an owner terminal, and a guest terminal. The vehicle includes a vehicle-side storage storing a vehicle-side owner private key, a vehicle-side distribution key, a vehicle-side variable value, and a vehicle-side one-time password; and a vehicle-side controller controlling running of the vehicle and performing information processing. The owner terminal includes an owner-terminal input unit receiving an operation instruction from a utilization manager of the vehicle; an owner-side storage storing a terminal-side owner private key, a terminal-side distribution key, a terminal-side variable value, and a terminal-side one-time password; and an owner-side controller performing information processing. The guest terminal includes a guest-terminal input unit receiving an operation instruction from a temporary user of the vehicle; a guest-side storage storing the terminal-side distribution key and the terminal-side one-time password received; and a guest-side controller performing information processing.