A Robust Physical Layer Key Generation Algorithm for Ultra-Wideband Ranging Process

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-09-24 DOI:10.1109/LCOMM.2024.3466954

Jianghao Wu;Haoyu Wu;Yun Chen

引用次数: 0

Abstract

Ultra-wideband (UWB) technology has been widely used for low-cost accurate ranging and positioning. To ensure communication security, a secret key must be derived before every ranging session. However, this process introduces significant latency and requires additional hardware. Therefore, this letter proposes a low-cost physical layer key generation algorithm that leverages the characteristics of multi-path channels for authentication and encryption. By effectively utilizing channel impulse response (CIR) and channel features, the proposed approach significantly reduces the key disagreement rate (KDR). Moreover, a scrambled timestamp sequence (STS) assisted error correction method is also proposed to further reduce the KDR. Simulation results demonstrate that, for a 128-bit physical key, the proposed scheme achieves a 0.5% KDR and over 83% STS matching rate at a 10 dB Signal to Noise Ratio (SNR). By utilizing several generation processes, the proposed algorithm can efficiently generate the physical layer key during the ranging session.

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超宽带测距过程的稳健物理层密钥生成算法

超宽带（UWB）技术已被广泛用于低成本精确测量和定位。为确保通信安全，必须在每次测距会话前提取密钥。然而，这一过程会带来很大的延迟，而且需要额外的硬件。因此，这封信提出了一种低成本的物理层密钥生成算法，利用多路径信道的特性进行验证和加密。通过有效利用信道脉冲响应（CIR）和信道特征，所提出的方法大大降低了密钥分歧率（KDR）。此外，还提出了一种加扰时间戳序列（STS）辅助纠错方法，以进一步降低 KDR。仿真结果表明，对于 128 位物理密钥，在信噪比（SNR）为 10 dB 的条件下，所提出的方案可实现 0.5% 的 KDR 和超过 83% 的 STS 匹配率。通过利用多个生成过程，所提出的算法可以在测距会话期间高效地生成物理层密钥。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.