A Robust Wireless Key Generation Method for IoT Devices Based on Autonomous Discarding and Calibration

doi:10.3969/j.issn.1671-1122.2023.11.003

Abstract

Abstract:

Considering the constrained resources and large-scale deployment of the IoT devices, traditional key pre-sharing methods and advanced key distribution methods are not suitable for IoT devices due to their difficulty in updating and high computational complexity. The wireless key generation method based on wireless channel characteristics has the advantages of low complexity and low resource requirements, and, thus, well suits the key sharing for IoT devices. This paper proposed a wireless key generation method for IoT devices based on autonomous abandonment and calibration, which could achieve robust wireless key generation at the expense of only a small increase in overhead. This paper proposed an autonomous calibration reset mechanism that eliminated the impact of accidental restarts on both sides’ wireless key generation and further realized the synchronous collection of channel characteristic data. This paper proposed a timeout selective discarding mechanism to address the issue of mismatching of channel characteristic data between communication parties in case of packet losses. The proposed method can significantly improve the robustness of the wireless key generation process. Practical experiments on a real IoT testbed demonstrate the effectiveness and stability of the proposed method.

Key words: Internet of things, wireless key generation, autonomous discarding and calibration

CLC Number:

TP309

HUAN Xintao, MIAO Kaitao, CHEN Wen, WU Changfan. A Robust Wireless Key Generation Method for IoT Devices Based on Autonomous Discarding and Calibration[J]. Netinfo Security, 2023, 23(11): 17-26.

Figures/Tables 11

References 18

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参数	值
射频频率	865 MHz
发送功率	5 dBm
带宽	125 kHz
扩频因子	7

NIST测试	p值
频数测试	0.4533
分组频数测试	0.9360
游程测试	0.0355
分组内最长游程测试	0.1657
频谱测试	0.8185
非重叠模板匹配测试	0.9970
线性复杂度测试	0.1434
串行测试	0.0171
近似熵测试	0.0188
累加和测试	0.5869