Modulated symbol-based one-time pad secure transmission scheme using physical layer keys  

作　　者：Xiaoyan HU Zheng WAN Kaizhi HUANG Liang JIN Mengyao YAN Yajun CHEN Jinmei YANG 

机构地区：[1]Information Engineering University,Zhengzhou 450001,China [2]Purple Mountain Laboratories for Network and Communication Security,Nanjing 211111,China

出　　处：《Science China(Information Sciences)》2024年第1期217-235,共19页中国科学（信息科学）（英文版）

基　　金：supported by National Natural Science Foundation of China(Grant No.U22A2001,62301608);National Key Research and Development Program of China(Grant Nos.2022YFB2902202,2022YFB2902205)。

摘　　要：This paper proposes a novel modulated symbols-based one-time pad(SOTP)secure transmission scheme using physical layer keys.Unlike classical physical layer key generation and exclusive OR(XOR)encryption in the discrete binary space,we design a framework for modulated symbols-based one-time pad(OTP)encryption,where the cryptographic primitive and mathematical model of SOTP is given to build a practical cryptographic protocol.Compared with existing physical layer encryption(PLE)schemes,we provide rigorous proof that the framework can meet perfect secrecy and correctness requirements.In addition,we provide a specific scheme of physical layer OTP secure transmission for quadrature amplitude modulation(QAM)and phase-shift keying(PSK)symbols based on physical layer keys.This scheme realizes the unification of bit encryption and symbol encryption,which can adaptively select the quantization level according to the signal-to-noise ratio(SNR)to minimize the symbol error rate(SER).Further,we analyze the performance quantitatively and derive the closed-form expressions of SER,which indicates that the proposed scheme has a lower SER.Finally,simulation results verify that the proposed symbol-wise OTP secure transmission scheme can achieve perfect secrecy and high reliability.

关 键 词：physical layer security one-time pad wireless channel physical layer encryption perfect secrecy 

分 类 号：TN918.4[电子电信—通信与信息系统]