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An Active Deception Defense Model Based on Address Mutation and Fingerprint Camouflage

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China Communications 2024年第7期21卷 212-223页

作者： Wang Shuo Chu Jiang pei qingqi Shao Feng Yuan Shuai Zhong Xiaoge State Key Laboratory of Astronautic Dynamics Xi’an Satellite Control CenterXi’an 710043China State Key Laboratory of Integrated Services Networks Xidian UniversityXi’an 710071China Shaanxi Key Laboratory of Blockchain and Secure Computing Xidian UniversityXi’an 710071China

The static and predictable characteristics of cyber systems give attackers an asymmetric advantage in gathering useful information and launching *** reverse this asymmetric advantage,a new defense idea,called Moving Target Defense(MTD),has been proposed to provide additional selectable measures to complement traditional ***,MTD is unable to defeat the sophisticated attacker with fingerprint tracking *** overcome this limitation,we go one step beyond and show that the combination of MTD and Deception-based Cyber Defense(DCD)can achieve higher performance than either of *** particular,we first introduce and formalize a novel attacker model named Scan and Foothold Attack(SFA)based on cyber kill ***,we develop probabilistic models for SFA defenses to provide a deeper analysis of the theoretical effect under different defense *** models quantify attack success probability and the probability that the attacker will be deceived under various conditions,such as the size of address space,and the number of hosts,attack analysis ***,the experimental results show that the actual defense effect of each strategy almost perfectly follows its probabilistic ***,the defense strategy of combining address mutation and fingerprint camouflage can achieve a better defense effect than the single address mutation.

关键词： address mutation deception defense fingerprint camouflage moving target defense probabilistic model

Utilizing Certificateless Cryptography for IoT Device Identity Authentication Protocols in Web3

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ZTE Communications 2024年第2期22卷 30-38页

作者： WU Zhihui HONG Yuxuan ZHOU Enyuan LIU Lei pei qingqi Guangzhou Institute of Technology Xidian UniversityGuangzhou 510700China Guangzhou Lianrong Information Technology Co.Ltd. Guangzhou 510700China The Hong Kong Polytechnic University Hong Kong 999077China

Traditional methods of identity authentication often rely on centralized architectures,which poses risks of computational overload and single points of *** propose a protocol that offers a decentralized approach by distributing authentication services to edge authentication gateways and servers,facilitated by blockchain technology,thus aligning with the decentralized ethos of Web3 ***,we enhance device security against physical and cloning attacks by integrating physical unclonable functions with certificateless cryptography,bolstering the integrity of Internet of Thins(IoT)devices within the evolving landscape of the *** achieve dynamic anonymity and ensure privacy within Web3 environments,we employ fuzzy extractor technology,allowing for updates to pseudonymous identity identifiers while maintaining key *** proposed protocol ensures continuous and secure identity authentication for IoT devices in practical applications,effectively addressing the pressing security concerns inherent in IoT network environments and contributing to the development of robust security infrastructure essential for the proliferation of IoT devices across diverse settings.

关键词： blockchain certificateless cryptography identity authentication IoT

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基于YOLOv5的轻量级雾天目标检测方法

计算机工程与应用 2024年第6期60卷 78-88页

作者：赖镜安陈紫强孙宗威裴庆祺桂林电子科技大学信息与通信学院广西桂林541000 西安电子科技大学通信工程学院西安710126

针对雾天场景下目标检测算法精度较低、模型复杂度较高,提出一种基于YOLOv5的轻量级雾天目标检测方法。采用感受野注意力模块(RFAblock)通过交互感受野特征信息,对感受野添加注意力机制,提高特征提取能力;采用轻量化网络Slimneck作为颈... 详细信息

针对雾天场景下目标检测算法精度较低、模型复杂度较高,提出一种基于YOLOv5的轻量级雾天目标检测方法。采用感受野注意力模块(RFAblock)通过交互感受野特征信息,对感受野添加注意力机制,提高特征提取能力;采用轻量化网络Slimneck作为颈部结构,在保持精度的同时降低模型参数和复杂度;在损失函数中引入真实框与预测框之间的角度向量,提高训练速度和推理的准确性;采用PNMS(precise non-maximum suppression)改进候选框选择机制,降低车辆遮挡情况下的漏检率。在真实雾天数据集RTTS和合成雾天数据集Foggy Cityscapes上进行测试,实验结果表明,与YOLOv5l相比mAP50分别提高了4.9和3.5个百分点,模型参数量仅为YOLOv5l的54.6%。

关键词：目标检测深度学习雾天场景轻量化注意力机制

Neighbor Detection-Based Spectrum Sensing Algorithm in Distributed Cognitive Radio Networks

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Chinese Journal of Electronics 2017年第2期26卷 399-406页

作者： pei qingqi LI Hongning LIU Xianjun State Key Laboratory of Integrated Services Networks Xidian University

Security issues of spectrum sensing have drawn a lot of attentions in Cognitive radio networks(CRNs).Malicious users can mislead the network to make wrong decision about the states of channels by tampering spectrum sensing *** defense against Spectrum sensing data falsification(SSDF) attack,we propose a neighbor detection-based spectrum sensing algorithm in distributed CRNs,which can detect attackers with the help of neighbors during spectrum sensing to improve the accuracy of decision *** proposed scheme can also guarantee the connectivity of the *** results illustrate that the proposed scheme can defense against SSDF attacks effectively and reach the unified information of spectrum sensing data.

关键词： Cognitive radio networks(CRNs) Spectrum sensing data falsification(SSDF) Neighbor detection Connectivity

Cooperative Secrecy to Resist Authentication Error in Two-Hop Wireless Networks

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Chinese Journal of Electronics 2016年第4期25卷 746-752页

作者： SHEN Yulong pei qingqi MA Jianfeng School of Computer Science and Technology Xidian University The State Key Laboratory of Integrated Services Networks School of Telecommunications Engineering Xidian University

The authentication error in two-hop wireless networks is considered without knowledge of eavesdropper channels and *** wireless informationtheoretic security has attracted considerable attention recently.A prerequisite for available works is the precise distinction between legitimate nodes and *** it is unrealistic in the wireless *** is always existing in the node authentication *** of our knowledge,there are no works focus on solving this problem in the information-theoretic *** paper presents a eavesdropper model with authentication error and two eavesdropping ***,the number of eavesdroppers can be tolerated is analyzed while the desired secrecy is achieved with high probability in the limit of a large number of relay ***,we draw two conclusions for authentication error:1) The impersonate nodes are chosen as relay is the dominant factor of the transmitted message leakage,and the impersonation attack does seriously decrease the number of eavesdroppers can be tolerated.2) The error authentication to legitimate nodes is almost no effect on the number of eavesdroppers can be tolerated.

关键词： Wireless networks Information-theoretic security Cooperative secrecy Authentication error

Dynamic Matching-Based Spectrum Detection in Cognitive Radio Networks

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China Communications 2019年第4期16卷 47-58页

作者： Yu Gu qingqi pei Hongning Li Shaanxi Key Laboratory of BlockChain and Security Computing Xidian University The State Key Laboratory of Integrated Services Networks Xidian University

Cognitive Radio Network provides an opportunity to reduce the spectrum resource crisis by allowing secondary users to access the idle spectrum allocated to primary users. The precondition of spectrum sharing is to obtain the Spectrum Availability Information(SAI). Energy detection is a typical technology to get SAI. With the mobility of primary users, the energy received by secondary users varies greatly with the distance from the target primary users. Most of the existing energy detection algorithms that use fixed thresholds are not suitable. We propose a Dynamic Matching-Based Spectrum Detection(DMBSD) scheme which can detect sensing data, reduce the impact of malicious data and make final sensing results more accurate with dynamic threshold setting and data matching. Simulation results show that the proposed scheme can detect tempered data, and increase detection probability by decreasing false alarm probability and missed detection probability.

关键词： cognitive radio spectrum sensing degradation domain dynamic matching

Energy Efficiency-Based Decision Making in Cognitive Radio Networks

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China Communications 2016年第11期13卷 205-213页

作者： Hongning Li qingqi pei Leilei Xu State Key Laboratory of Integrated Services Networks Xidian University School of Telecommunications Engineering Xidian University

As a constraint for smart devices,energy consumption has attract people's attention for a long time period. How to get higher resource utilization with less energy consumption is a challenge for cognitive radio networks. Secondary users have to participate in spectrum sensing at the cost of energy and access idle spectrum without interfering primary users. However,not all participating secondary users can access idle spectrum. How to ensure the participation users access spectrum efficiently with a larger probability is an urgent problem to be solved. We propose an Energy Efficiency-based Decision Making(EEDM) for cognitive radio networks,which fully considers residual energy and probability of obtaining spectrum resources. Simulation and analysis show that the proposed scheme can maximize proportion of allocated users under the premise of ensuring the accuracy of spectrum sensing,then balance users' energy consumption and access efficiency,so as to effectively improve the utilization of spectrum resources.

关键词： cognitive radio networks spectrum sensing energy efficiency decision making

Analysis on the Resilience of Key Pre-distribution in Sensor Networks

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China Communications 2007年第3期4卷 30-37页

作者： Shen Yulong Ma Jianfeng pei qingqi Xidian Univ Sch Comp Sci & Technol Xian 710071 Shaanxi Peoples R China Minist Educ Key Lab Comp Networks & Informat Secur Xian 710071 Shaanxi Peoples R China

Resilience against node capture is one of the main indicators of the key pre-distribution security in sensor *** providing the attack model and the definition of the resilience against node capture of sensor networks,the resilience of basic random key pre-distribution,Q-composite random key pre-distribution and their reinforced schemes are analyzed and compared in *** results show that the size of key pool,the numbers of the keys stored in nodes and the value of Q determine the resilience of random key *** tradeoff between the resilience,security connectivity and costs in sensor networks is *** researches lay a foundation on the design of the secure protocol and the algorithm in the specific application environment of sensor networks.

关键词： sensor networks resilience analysis key pre-distribution

Expression Preserved Face Privacy Protection Based on Multi-mode Discriminant Analysis

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Computers, Materials & Continua 2018年第10期57卷 107-121页

作者： Xiang Wang Chen Xiong qingqi pei Youyang Qu Xidian University Xi’an710071China Deakin University Burwood3125Australia

Most visual privacy protection methods only hide the identity information of the face images,but the expression,behavior and some other information,which are of great significant in the live broadcast and other scenarios,are also destroyed by the privacy protection *** this end,this paper introduces a method to remove the identity information while preserving the expression information by performing multi-mode discriminant analysis on the images normalized with AAM *** face images are decomposed into mutually orthogonal subspaces corresponding to face attributes such as gender,race and expression,each of which owns related characteristic ***,the expression parameter is preserves to keep the facial expression information while others parameters,including gender and race,are modified to protect face *** experiments show that this method yields well performance on both data utility and privacy protection.

关键词： Privacy protection multi-mode discrimination expression-preserving