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A One-Time Pad Encryption Scheme Based on Efficient Physical-Layer Secret Key Generation for Intelligent IoT System

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China Communications 2022年第7期19卷 185-196页

作者： Liquan Chen Kailin Cao Tianyu Lu Yi Lu aiqun hu School of Cyber Science and Engineering Southeast UniversityNanjing 210096China Purple Mountain Laboratories Nanjing 211189China National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China

The one-time pad(OTP)is an applicationlayer encryption technique to achieve the informationtheoretic security,and the physical-layer secret key generation(SKG)technique is a promising candidate to provide the random keys for *** this paper,we propose a joint SKG and OTP encryption scheme with the aid of a reconfigurable intelligent surface(RIS)to boost secret key *** maximize the efficiency of secure communication,we divide the process of secure transmission into two stages:SKG and then encrypted packet ***,we design an optimal algorithm for allocating time slots for SKG to maximize SKG efficiency without security ***,we design a key updating protocol based on our SKG scheme for OTP *** results verify that our scheme can generate keys securely and efficiently,and significantly improve the secure communication performance in an intelligent IoT system.

关键词： physical layer security intelligent internet of things one-time pad reconfigurable intelligent surface

A High Consistency Wireless Key Generation Scheme for Vehicular Communication Based on Wiener Filter Extrapolation

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Automotive Innovation 2023年第4期6卷 547-557页

作者： Yiming Ma Linning Peng Wenhao Yin hua Fu aiqun hu Peng Guo Hongxing hu School of Cyber Science and Engineering Southeast UniversityNanjingChina Purple Mountain Laboratories NanjingChina National Mobile Communications Research Laboratory Southeast UniversityNanjingChina China Automotive Innovation Co. LtdNanjingChina

Secret key generation from wireless channel is an emerging technology for communication network security,which exploits the reciprocity and time variability of wireless channels to generate symmetrical keys between the communication *** to the existing asymmetric key distribution methods,secret key generation from wireless channel has low complexity and high security,making it especially suitable for distributed *** vehicular communications,the reciprocity of wireless channel is degraded due to the movement of *** paper proposes a high consistency wireless key generation scheme for vehicular communication,especially applied to LTE-V2X(LTE vehicle to everything)systems.A channel reciprocity enhancement method is designed based on Wiener filter extrapolation,which can efficiently reduce the mismatch between the channels at the receiver and significantly reduce key disagreement rate.A real experimental system based on vehicle and universal software radio peripheral(USRP)platform is setup to verify the secret key generation in LTE-V2X *** effectiveness of the proposed method is verified in simulations and extensive practical tests.

关键词： Physical layer security Wireless key generation LTE-V2X Channel reciprocity Wiener filter

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广宁县砂仁产业发展现状及对策

农业研究与应用 2024年第1期37卷 61-65页

作者：胡爱群邓权清梅瑜王继华广东省肇庆市广宁县农业农村局广东肇庆526300 广东省农业科学院作物研究所广东省农作物遗传改良重点实验室广东广州510640 广东省道地南药资源保护与利用工程技术研究中心广东广州510640

砂仁是我国“四大南药”之一,广宁砂仁也有百年种植历史。文章概述了在全面推进乡村振兴的时代背景下肇庆市广宁县砂仁产业的发展现状。分析广宁砂仁产业的发展优势、过往经验及所面临的挑战,提出科学发展对策,以期让砂仁产业在广宁乡... 详细信息

砂仁是我国“四大南药”之一,广宁砂仁也有百年种植历史。文章概述了在全面推进乡村振兴的时代背景下肇庆市广宁县砂仁产业的发展现状。分析广宁砂仁产业的发展优势、过往经验及所面临的挑战,提出科学发展对策,以期让砂仁产业在广宁乡村振兴中发挥更大的作用。

关键词：赤坑镇砂仁对策发展现状

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Throughput and BER of wireless powered DF relaying in Nakagami-m fading

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Science China(Information Sciences) 2017年第10期60卷 204-216页

作者： Yan GAO Yunfei CHEN aiqun hu School of Electronic Information Nanjing College of Information Technology College of Computer and Information Hohai University College of Information Science and Engineering Southeast University

Energy harvesting provides a promising solution to the extra energy requirement at the relay due to relaying. In this paper, the throughput and bit error rate of a decode-and-forward relaying system are studied using power splitting wireless power. Three different transmission scenarios are considered: instantaneous transmission, delay-or error-constrained transmission and delay-or error-tolerant transmission. For each scenario,exact expressions for the throughput and bit error rate are derived. Numerical results show that, for instantaneous transmission, the optimum splitting factor is not sensitive to the channel gain of the source-to-relay *** delay-or error-constrained transmissions, the optimum splitting factor increases with the quality of the source-to-relay link and decreases with the quality of the relay-to-destination link. For delay-or error-tolerant transmissions, the optimum splitting factor is insensitive to the quality of the source-to-relay link.

关键词： decode-and-forward energy harvesting power-splitting relaying

An Improved Key Generation Scheme Based on Multipath Channel Measurements

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Chinese Journal of Electronics 2017年第1期26卷 185-191页

作者： HAN Yuanzhi hu aiqun School of Information Science and Engineering Southeast University

Channel reciprocity is a vital component for the key generation from multipath channels. In this paper, we introduce the effect of delay between measures on the channel reciprocity, build an Autoregression(AR)model to approximate time-varying channel measurements and apply a linear prediction method to reduce the measurement errors and to enhance the dependency between measurements of two communication parties. In the following bit conversion, we propose a novel quantization scheme named the Probability distance method(PDM) and compare its performance with other existing methods theoretically. The simulation results show that the optimal solution to the linear prediction problem can effectively increase the channel reciprocity in the assumed channel *** proposed PDM can achieve a lower disagreement rate with acceptable costs.

关键词： Physical layer security Key generation Linear prediction Multipath

Secure transmission technology based on direct modulation with random channel characteristics

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Security and Safety 2022年第1期1卷 103-114页

作者： Rong Yang aiqun hu School of Cyberspace Security Southeast UniversityNanjing 211189China State Key Laboratory of Mobile Communications Southeast UniversityNanjing 210096China

Aiming at the problem of insucient security in the existing wireless data trans-mission,a security transmission technology based on direct modulation with random channel characteristics is *** method rst estimates channel characteristics using the preamble in the communication frame,and then embeds channel characteristics into the I/Q *** that,the modulated constellation diagram undergoes random hopping of the constellation position compared with the original constellation diagram,thus achieving the e ect of secure *** to the reciprocity of the uplink and downlink channels,channel characteristics estimated by the downlink receiver are almost the same as those esti-mated by the uplink receiver,and the correct plaintext data can be recovered by performing corresponding demodulation with *** with the existing scheme of quantizing channel characteristics and then encrypting data,the method reduces the performance loss caused by *** addition,its bit error rate is lower than that of the quantization *** general,it has higher security and convenience.

关键词： Channel reciprocity Channel state information(CSI) Physical layer security Channel characteristics Constellation diagram

Multi-User File-Sharing Systems Based on LWE

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China Communications 2020年第7期17卷 166-182页

作者： Xuyang Wang aiqun hu Hao Fang Southeast University Nanjing 210096China Purple Mountain Laboratories Nanjing 210000China UPSEC Cyber INC.Nanjing 210096 China.

Multi-user file-sharing plays an important role in the cloud *** allows different users to share files via the ***,it usually faces many security issues because the cloud is usually public and *** overcome these issues,we propose multi-user file-sharing systems(MFS)in this *** to the date sources,we propose two frameworks of MFS based on the framework of proxy re-encryption(PRE),unique source(uni-source)MFS and multi-source *** formalize the security models,which contain ciphertext security,secret key security and master secret *** the frameworks,we propose two secure and efficient MFS schemes based on LWE,the uni-source MFS UM and the multi-source MFS *** prove that UM is secret key and ciphertext security,and MM is secret key,master secret and ciphertext security with the hardness assumptions of LWE and ***,we prove they have some useful properties,such as non-interactive and anonymous.

关键词： interactive framework LWE

A novel artificial noise aided security scheme to resist blind source separation attacks

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Chinese Science Bulletin 2014年第32期59卷 4225-4234页

作者： Guyue Li aiqun hu Yongming huang School of Information Science and Engineering Southeast University

In this paper,we discuss the physical layer security from a new angle of view and propose a novel approach to resist some attacks in signal processing *** scenario considered in this paper is that the eavesdropper has the similar channel performance compared to the legitimate *** design the optimal artificial noise(AN)to resist the attacks of the eavesdropper who uses the blind source separation(BSS)technology to reconstruct the secret *** speech signals,the optimal AN is obtained by minimizing the maximum of the correlation coefficients between the source signal and the received signals at Eve and the correlation coefficients between the source signal and separated results of *** binary phase shift keying(BPSK)signals,we maximize the minimum bit error rates(BERs)of the separated signals and the obtained signals at ***,we consider the AN design from the point of breaking the BSS conditions,and propose a method by changing the correlation coefficient *** simulation results show that the AN we proposed has better performance than that of the white Gaussian AN to resist the BSS attacks for both speech signals and the BPSK signals.

关键词：盲源分离抗攻击安全计划噪声 BPSK信号信号处理相关系数语音信号

Changes in Maternal Socio-Demographic Characteristics and Pregnancy Outcomes Across Monitoring Regions-Six Provinces,China,2016-2022

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China CDC weekly 2024年第31期6卷 772-777页

作者： Yuting Qiao Jiangli Di aiqun huang huanqing hu Sidi Chen Wei Zhao National Center for Women and Children’s Health National Health Commission of the People’s Republic of ChinaBeijingChina

Summary What is already known about this topic?In recent years,there has been a significant increase in the proportion of women of advanced maternal age(AMA),accompanied by a rise in adverse pregnancy outcomes in certain regions of *** is added by this report?From 2016 to 2022,there was an observed increase in the proportion of AMA,educational levels,and incidences of preterm birth and low birth weight(LBW)in both primiparous and multiparous ***,there was a declining trend in the rate of cesarean deliveries and the incidence of macrosomia among multiparous *** are the implications for public health practice?In addition to focusing on health management for AMA individuals,proactive steps should be undertaken to enhance the quality of medical services and promote childbirth at optimal ages,thereby reducing the incidence of adverse pregnancy outcomes.

关键词： thereby steps birth