A Lightweight and Efficient Key Generation Scheme From OFDM Subcarriers' Channel Responses

被引：0

作者：

Kawoya, Agnes Francis ^{[1
,2
]}

Wang, Hua ^{[1
]}

He, Dongxuan ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China

[2] Univ Dodoma, Dept Elect & Telecommun Engn, Dodoma 490, Tanzania

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2024年 / 13卷 / 11期

基金：

中国国家自然科学基金;

关键词：

key generation; quantization; Physical layer security;

D O I：

10.1109/LWC.2024.3457752

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This letter presents a physical layer secret key generation (PLSKG) protocol utilizing the amplitude of channel frequency response (CFR) of Orthogonal Frequency Division Multiplexing (OFDM) subcarriers. Firstly, least squares estimation estimates the CFR. Next, a partition moving average (PMA) algorithm encodes the CFR. PMA re-uses the CFR within a partition by encoding at different overlap sizes, thus increasing the key generation rate (KGR). Then, a 2-bit differential-based quantization at every overlap for each partition is followed for an improved KGR and randomness. Finally, a cyclic redundancy check is performed to select strings with consistent results as candidate key, eliminating streams from less correlated measurements, thus ensuring a 0-bit mismatch. Simulation results have verified that our scheme achieves random 0-bit disagreement keys with a high average key length and reduced complexity compared to the other existing lightweight schemes.

引用

页码：3177 / 3181

页数：5