Digital Key Sharing via Intermediary Server and Public Key Attestation
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Solution Overview
Problem
Existing digital key sharing methods face challenges in ensuring security and convenience, particularly when sharing access to electronic devices like vehicles, as they require users to manage separate accounts with different manufacturers, complicating the process and potentially exposing digital keys to hacking risks.
Innovation Solution
A method involving an owner device and a target device, facilitated by backend servers and a service provider server, where a digital key is generated and shared using public keys and signatures, allowing secure control of electronic devices over which the owner device has authority, with the option to directly communicate using short-range wireless methods like NFC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If digital key is integrated into mobile device using wireless communication technology, then user convenience is improved, but security risk increases due to potential hacking
Solution Approach 1:
The patent introduces a service provider server as an intermediary that manages and distributes digital keys. The server acts as a trusted mediator between the electronic device and multiple user devices, enabling secure key sharing without requiring direct pairing between each device pair. This intermediary architecture maintains security while enabling convenient multi-device access.
Solution Approach 2:
The patent creates multiple copies of the digital key and distributes them to different user devices through the service provider server. Instead of requiring physical key sharing or direct device-to-device transmission, the system generates digital key copies that can be securely distributed to authorized users, maintaining security while enabling convenient access across multiple devices.
2Ease of operation
If digital key is shared between multiple devices, then convenience is improved, but security control becomes more difficult
Solution Approach 1:
The service provider server serves as a central intermediary that manages all digital key distributions and revocations. When a user needs access to an electronic device, the server mediates the key distribution process. When access needs to be revoked or keys need to be updated, the server centrally controls these changes, simplifying security management despite multiple key copies existing across various devices.
3Adaptability or versatility
If separate accounts are required for different manufacturers, then device compatibility is improved, but user complexity increases
Solution Approach 1:
The service provider server provides a universal platform that works across multiple device manufacturers and electronic device types. Instead of requiring separate account systems for each manufacturer, the server implements a unified authentication and key management system that is compatible with various devices, eliminating the need for users to manage multiple separate accounts while maintaining broad device compatibility.
Data Source
AI summary
Provided is a method of sharing a digital key between devices, and a method, performed by an owner device in a wireless communication system, including transmitting, to a friend device, key configuration data, receiving, from the friend device, certification information signed by a private key of the friend device, the certification information including a public key of the friend device, generating a key attestation based on the certification information and the key configuration data, and transmitting, to the friend device, information including the key attestation.