Shared Accessory Onboarding for Secure Location Tracking
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Solution Overview
Problem
Existing location-tracking applications struggle to securely manage and locate shared accessories across multiple devices, particularly when ownership or authorization status is unclear, leading to inefficient and user-unfriendly operations.
Innovation Solution
A system for securely onboarding and managing shared accessories using cryptographic keys and a central server to authenticate and authorize devices, enabling precise location tracking and minimizing unauthorized access, with features like fast advertising mode for lost accessories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the accessory device continuously advertises in fast advertising mode to improve locateability, then the probability of being found increases, but power consumption increases
Solution Approach 1:
The accessory device dynamically adjusts its advertising mode based on the operational state of the host device. When the host device is in sleep mode or has been inactive for a predetermined period, the accessory device switches to fast advertising mode to improve locateability. When the host device is active or recently active, the accessory device uses normal advertising mode to conserve power. This dynamic adaptation resolves the contradiction by making the advertising behavior flexible rather than static.
Solution Approach 2:
The system changes the advertising parameter (advertising mode) based on the time since the host device was last active. By monitoring the inactivity duration and comparing it against a predetermined threshold, the system adjusts the advertising intensity accordingly. This parameter change allows the accessory to optimize between locateability and power consumption based on actual usage conditions.
2Speed
If the accessory device enters fast advertising mode to improve locateability, then the response time for location tracking decreases, but the device complexity increases
Solution Approach 1:
The accessory device uses feedback from the host device's operational state to determine when to activate fast advertising mode. The host device provides feedback about its activity status (through sleep mode indicators or inactivity detection), and the accessory device responds by adjusting its advertising behavior accordingly. This feedback mechanism simplifies the complexity management by using existing host device signals rather than requiring independent complex detection systems.
3Reliability
If the system tracks location of accessories not associated with the user to improve security, then unauthorized access is reduced, but the ease of operation decreases
Solution Approach 1:
The system automatically handles the complex authentication and location tracking processes without requiring manual user intervention. When an accessory connects to a host device, the system automatically determines the association status, retrieves appropriate cryptographic keys, and configures location tracking accordingly. This self-service approach maintains security through automated verification while preserving ease of operation by eliminating manual configuration requirements.
Data Source
AI summary
An electronic user device may detect an accessory device. An onboarding process of the accessory device initiates pairing of the accessory device to the user identifier (ID) associated with the electronic user device. The electronic device may determine whether the accessory device is locked with the user ID or locked with a different user ID and may apply an appropriate procedure in response.