UWB Ranging Frame Encryption for Secure Timestamp Sequences
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Solution Overview
Problem
The existing UWB ranging technology faces a security risk due to the use of identical scrambled timestamp sequences in each ranging round, which compromises the security of the communication process.
Innovation Solution
Implement a method where both devices generate and use unique ranging encryption parameters for each ranging frame by deriving them from shared configuration information and a key derivation algorithm, ensuring that each frame has a distinct encryption parameter without establishing a communication link between broadband systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If identical scrambled timestamp sequences are used in each ranging round, then the ranging process is simple and fast, but security is compromised
Solution Approach 1:
The patent applies dynamics by transitioning from static identical sequences to dynamic unique sequences. Each ranging frame uses a different encryption parameter generated through key derivation based on the ranging frame's sequence number, making the encryption parameters change dynamically with each ranging round while maintaining systematic generation.
Solution Approach 2:
The patent changes the parameter from fixed identical sequences to variable unique sequences. By deriving encryption parameters from a base key and incorporating the sequence number of each ranging frame, the system generates different encryption parameters for each frame, thereby enhancing security without requiring complex manual parameter management.
2Reliability
If communication link establishment is required between broadband systems for negotiation, then parameter coordination is ensured, but system power consumption and operating time increase
Solution Approach 1:
The patent implements self-service by enabling each broadband system to independently generate its own encryption parameters using a shared base key and the ranging frame's sequence number. This eliminates the need for inter-system communication and negotiation, as each system can autonomously derive the correct encryption parameter locally.
Solution Approach 2:
The patent applies preliminary action by pre-establishing a shared base key between the broadband systems before ranging begins. This preliminary key sharing enables both systems to independently generate matching encryption parameters without requiring real-time communication or negotiation during the ranging process, thereby reducing power consumption and operating time.
Data Source
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AI summary
This application provides a ranging method and apparatus. In the method, when ranging is performed between a first device and a second device, each ranging frame in one ranging round is determined based on different ranging encryption parameters, so that ranging frames generated in the ranging round are different from each other. In other words, the first device and the second device use different encryption parameters to encrypt and decrypt different ranging frames. This ensures that each ranging frame has a unique encryption parameter in a ranging process, so that secure ranging performance can be effectively improved.