Vehicle Digital Key Sharing With Secure Token Authentication
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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 the key 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 access, employing authentication tokens and asymmetric key algorithms to secure and restrict access, with features like secure storage, double authentication, and conditional sharing options.
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 divides the digital key system into multiple components: a main body for wireless door key and separate control devices (mobile terminals). The primary user retains control through the mobile terminal while the physical key body can be shared. This segmentation allows the key functionality to be separated from control authority, enabling safe sharing while maintaining security oversight.
Solution Approach 2:
The mobile terminal acts as an intermediary between the primary user and the shared digital key. It mediates the authentication process by verifying the user's identity and authorizing the use of the digital key. This intermediary layer ensures that even when the physical key is shared, only authorized users can successfully authenticate and use it.
2Ease of operation
If digital key authentication is simplified for ease of use, then ease of operation is improved, but security against theft and unauthorized use deteriorates
Solution Approach 1:
The patent implements a multi-layered security architecture where the mobile terminal's secure environment acts as a protective shell around the authentication process. This secure environment (trusted execution environment or secure element) provides a protected layer that safeguards cryptographic operations and key management, allowing simple user interaction while maintaining robust security against theft and unauthorized access.
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.