Vehicle Digital Key Sharing via Secure World Segmentation
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Solution Overview
Problem
Current digital key technologies face challenges in securing access rights and preventing theft, especially when digital keys are shared or lost, as they often require physical possession of a device and lack robust authentication methods.
Innovation Solution
A vehicle digital key sharing service method and system that uses a mobile terminal operating in both normal and secure operating systems to manage digital key registration, sharing, and authentication, employing encryption and decryption processes with asymmetric and symmetric key algorithms, and a compound authentication method to secure access rights and prevent unauthorized use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a main body for wireless door key is handed to another person for convenience, then user convenience is improved, but security control is lost and theft risk increases
Solution Approach 1:
The patent segments the digital key functionality into two separate components: a first digital key stored in a secure environment and a second digital key stored in a normal environment. This segmentation allows the secure key to remain controlled while the normal key can be shared, resolving the contradiction between convenience and security control.
Solution Approach 2:
The patent introduces a server as an intermediary that manages and coordinates between the first digital key (secure) and second digital key (normal). The server enables controlled sharing by mediating authentication and authorization, allowing convenience of sharing while maintaining security through centralized control.
2Reliability
If digital key is lost, then access functionality is compromised, but with proper security measures theft prevention should be maintained
Solution Approach 1:
The patent changes the parameter of key storage location by implementing dual storage environments (secure and normal). When the device is lost, the system can detect the abnormal state and transfer or revoke access rights through parameter changes in the key management system, maintaining theft prevention while enabling controlled access recovery.
3Ease of operation
If digital key sharing is enabled, then user convenience is improved, but authentication security may be compromised
Solution Approach 1:
The patent segments authentication into two layers: secure environment authentication for the first digital key and normal environment authentication for the second digital key. This segmentation enables sharing through the normal key while maintaining strong authentication security through the secure key, resolving the contradiction between sharing convenience and authentication security.
Data Source
AI summary
The vehicle digital key sharing service method according to one embodiment includes a digital registration step in which a management server generates a terminal digital key and a vehicle digital key after user authentication in response to a digital key registration request through a dedicated application of a mobile terminal and the mobile terminal stores the terminal digital key in a secure world that is separated from a normal world and a digital key using step in which an authentication token is generated using the terminal digital key stored in the secure world when the mobile terminal approaches or tags a vehicle and a vehicle device locks or unlocks a door of the vehicle by activating the vehicle digital key, which is registered from the management server, to validate the authentication token.