UWB Node Scrambled Timestamps for Secure Localization
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Solution Overview
Problem
Current ultra-wideband (UWB) localization systems face security challenges in broadcast-based systems due to the lack of bidirectional message exchange, leading to potential replay or relay attacks, and limited channel capacity restricts frequent node localization, especially in indoor environments where satellite technologies are ineffective.
Innovation Solution
Incorporating an ultra-wideband communication node with a processing unit that determines scrambled timestamp sequences and designated time slots, which are transmitted to an external device, enabling secure authentication by verifying if these sequences are received within their designated time slots, thereby enhancing security and reducing channel burden through in-band or out-of-band synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bidirectional message exchange is implemented to prevent replay attacks, then security is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-generating and transmitting a list of scrambled timestamp sequences along with their designated time slots before the actual localization measurement. This allows the external device to verify authenticity in advance without requiring complex bidirectional exchange during the measurement phase, thus improving security while keeping the device complexity manageable
Solution Approach 2:
The patent segments the authentication process into two parts: (1) transmission of scrambled timestamp sequences and time slot information, and (2) verification during measurement. This segmentation allows the security verification to be performed efficiently without burdening the communication channel during critical localization operations
2Measurement precision
If frequent localization measurements are performed, then localization accuracy is improved, but channel capacity is exceeded
Solution Approach 1:
The patent uses preliminary action by transmitting all necessary scrambled timestamp sequences and time slot assignments before the measurement phase. This preparation allows multiple rapid localization measurements to be performed without requiring additional authentication exchanges, thereby improving measurement frequency without exceeding channel capacity
Solution Approach 2:
The system enables self-service authentication where the external device independently verifies each timestamp sequence against the pre-received list and time slots without requiring real-time communication with the transmitting device. This allows frequent localization measurements while maintaining security verification
Data Source
AI summary
In accordance with the first aspect of the present disclosure, an ultra-wideband communication node is provided, comprising: an ultra-wideband communication unit configured to transmit one or more ultra-wideband frames to an external device; a processing unit configured to determine scrambled timestamp sequences for said ultra-wideband frames; wherein the processing unit is further configured to determine designated time slots, within which said scrambled timestamp sequences are to be received by said external device.