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Energy Efficiency Optimization of IRS-Aided Multiuser MISO Underlay EH-CR communication Systems By Using PER-SD3 Method

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IEEE Transactions on Cognitive communications and Networking 2025年

作者： Wang, Jun Pei, Hai Yang, Liang Hu, Jinsong Wu, Liang Shu, Feng Fuzhou University College of Electrical Engineering and Automation Fuzhou350108 China Fuzhou University Mechanical and Electrical Engineering Practice Center Fuzhou350108 China Fuzhou University College of Physics and Information Engineering Fuzhou China Southeast University National Mobile Communications Research Laboratory Frontiers Science Center for Mobile Information Communication and Security Nanjing210006 China Hainan University School of Information and Communication Engineering Haikou570228 China Nanjing University of Science and Technology School of Electronic and Optical Engineering Nanjing210094 China

With the increasing demand of wireless communication, the data rates supported by wireless communication technology are required to be higher, which also leads to the shortage of spectrum resources. Cognitive radio (CR) is considered a promising technology that can make full use of spectrum resources. Currently, Intelligent Reflecting Surfaces (IRSs) are gaining popularity. They autonomously regulate the wireless communication environment to achieve higher data rates and better coverage. In this paper, an IRS-based model is proposed to solve the energy efficiency (EE) optimization problem, which is in multiuser multiple input single output (MISO) energy harvesting CR (EH-CR) communication systems. The model enables the secondary transmitter (ST) to utilize EH technology to capture radio frequency (RF) energy from the primary user (PU), thereby powering its own data transmission. Due to the complexity and continuity of action and state space, a softmax deep double deterministic policy gradients method based on prioritized experience replay (PER-SD3) is designed to jointly optimize the transmission beamforming vector of the ST and the IRS reflection phase shift matrix. Simulation results show that the proposed method can improve the EE of underlay EH-CR communication systems by 35.3% at most compared with the benchmark cases. © 2015 IEEE.

关键词： Cognitive radio

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Practical continuous-variable quantum key distribution with feasible optimization parameters

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science China(Information sciences) 2023年第8期66卷 80-91页

作者： Li MA Jie YANG Tao ZHANG Yun SHAO Jinlu LIU Yujie LUO Heng WANG Wei HUANG Fan FAN Chuang ZHOU Liangliang ZHANG Shuai ZHANG Yichen ZHANG Yang LI Bingjie XU Science and Technology on Communication Security Laboratory Institute of Southwestern Communication State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

Continuous-variable quantum key distribution(CV-QKD) offers an approach to achieve a potential high secret key rate(SKR) in metropolitan areas. There are several challenges in developing a practical CV-QKD system from the laboratory to the real world. One of the most significant points is that it is really hard to adapt different practical optical fiber conditions for CV-QKD systems with unified hardware. Thus,how to improve the performance of practical CV-QKD systems in the field without modification of the hardware is very important. Here, a systematic optimization method, combining the modulation variance and error correction matrix optimization, is proposed to improve the performance of a practical CV-QKD system with a restricted capacity of postprocessing. The effect of restricted postprocessing capacity on the SKR is modeled as a nonlinear programming problem with modulation variance as an optimization parameter,and the selection of an optimal error correction matrix is studied under the same scheme. The results show that the SKR of a CV-QKD system can be improved by 24% and 200% compared with previous frequently used optimization methods theoretically with a transmission distance of 50 km. Furthermore, the experimental results verify the feasibility and robustness of the proposed method, where the achieved optimal SKR achieved practically deviates <1.6% from the theoretical optimal value. Our results pave the way to deploy high-performance CV-QKD in the real world.

关键词： continuous-variable quantum key distribution post-processing optimization secret key rate

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Spatially Coupled 5G LDPC Codes via Superposition

Spatially Coupled 5G LDPC Codes via Superposition

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IEEE Conference on Wireless communications and Networking

作者： Jiayi Yang Qianfan Wang Zhiyuan Tan Congduan Li Xiao Ma School of Computer Science and Engineering Sun Yat-sen University Guangzhou China Guangdong Key Laboratory of Information Security Technology Sun Yat-sen University Guangzhou China Huawei Technologies Co. Ltd. Shanghai China School of Electronics and Communication Engineering Sun Yat-sen University Shenzhen China

ISBN: (数字)9798350368369

ISBN: (纸本)9798350368376

We propose in this paper to enhance the 5G low-density parity-check (LDPC) codes by transmitting the codewords in a block Markov superposition transmission (BMST) manner, resulting in a class of spatially coupled LDPC codes. We present a generalized extrinsic information transfer (EXIT) chart for performance analysis, showing that the decoding thresholds can be improved by increasing the memory size (coupled width) $m$ . However, for m > 1, the receiver requires a relatively large window size for the sliding window decoding (SWD) algorithm, potentially causing unacceptable decoding latency. To address this issue, we propose an adaptive sliding window decoding (ASWD) algorithm, in which the decoding window size depends on the decoding state of the BMST system. The proposed EXIT chart analysis can also effectively guide the setting of the maximum decoding window in the ASWD algorithm, as well as the setting of the superposition fractions for the BMST-5G-LDPC system. Simulation results show that: 1) the ASWD algorithm can effectively reduce the average decoding window size in the medium to high signal-to-noise ratio (SNR) region, without the performance loss compared to the conventional SWD algorithm; 2) the proposed BMST-5G-LDPC code can achieve about 0.4, 0.5 and 1.7 dB performance gains compared to the 5G LDPC code over the AWGN channel, the fast fading channel, and the quasi-static block fading channel, respectively.

关键词： Fading channels Couplings 5G mobile communication Simulation Receivers Performance gain Parity check codes Encoding Decoding Signal to noise ratio

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Decoy-state method for quantum-key-distribution-based quantum private query

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science China(Physics,Mechanics & Astronomy) 2022年第4期65卷 41-48页

作者： Bin Liu Shuang Xia Di Xiao Wei Huang Bingjie Xu Yang Li College of Computer Science Chongqing UniversityChongqing 400044China Science and Technology on Communication Security Laboratory Institute of Southwestern CommunicationChengdu 610041China

The quantum private query(QPQ)is a quantum solution for the symmetrically private information retrieval *** study the security of quantum-key-distribution-based QPQ with weak coherent *** result shows that multiphoton pulses have posed a serious threat to the participant’s privacy in QPQ *** we propose a decoy-state method that can help the honest participant detect the attack by exploiting multiphoton pulses and improving the key distillation process to defend against such *** analysis demonstrates that our decoy-state method significantly improves the security of the QPQ with weak coherent pulses,which solves a major obstacle in the practical application of the QPQ.

关键词： quantum private query symmetrically private information retrieval quantum key distribution decoy state weak coherent pulse

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Research on the Construction of a Novel Cyberspace security Ecosystem

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Engineering 2018年第1期4卷 47-52页

作者： Xiao-Niu Yang Wei Wang Xiao-Feng Xu Guo-Rong Pang Chun-Lei Zhang Science and Technology on Communication Information Security Control Laboratory Jiaxing Zhejiang 314033 China Science and Technology on Electro-Optical Information Security Control Laboratory Tianfin 300300 China

Given the challenges facing the cyberspace of the nation, this paper presents the tripartite theory of cyberspace, based on the status quo of cyberspace. Corresponding strategies and a research architecture are proposed for common public networks （C space）, secure classified networks （S space）, and key infras- tructure networks （K space）, based on their individual characteristics. The features and security require- ments of these networks are then discussed. Taking C space as an example, we introduce the SMCRC （which stands for ＂situation awareness, monitoring and management, cooperative defense, response and recovery, and countermeasures and traceback＂） loop for constructing a cyberspace security ecosys- tem. Following a discussion on its characteristics and information exchange, our analysis focuses on the critical technologies of the SMCRC loop. To obtain more insight into national cyberspace security, special attention should be paid to global sensing and precise mapping, continuous detection and active manage- ment, cross-domain cooperation and systematic defense, autonomous response and rapid processing, and accurate traceback and countermeasure deterrence.

关键词： Cyberspace security ecosystem SMCRC loop Tripartite theory of cyberspace

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Joint Beamforming Design for Integrated Sensing and communication Systems with Hybrid-Colluding Eavesdroppers

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IEEE Transactions on communications 2025年

作者： Liu, Meiding Zhou, Zhengchun Shi, Qiao Li, Guyue Liu, Zilong Fan, Pingzhi Lee, Inkyu Southwest Jiaotong University School of Information Science and Technology Chengdu611756 China Key Laboratory of Analytical Mathematics and Applications China Southeast University School of Cyber Science and Engineering Nanjing210096 China Purple Mountain Laboratories for Network and Communication Security Nanjing210096 China University of Essex School of Computer Science and Electronics Engineering ColchesterCO4 3SQ United Kingdom Southwest Jiaotong University Key Laboratory of Information Coding and Transmission Chengdu611756 China Korea University School of Electrical Engineering Seoul02841 Korea Republic of

In this paper, we consider the physical layer security (PLS) problem for integrated sensing and communication (ISAC) systems in the presence of hybrid-colluding eavesdroppers, where an active eavesdropper (AE) and a passive eavesdropper (PE) collude to intercept the confidential information. To ensure the accuracy of sensing while preventing the eavesdropping, a base station transmits a signal consisting of information symbols and sensing waveform, in which the sensing waveform can be also used as artificial noise to interfere with eavesdroppers. Under this setup, we propose an alternating optimization-based two stage scheme (AO-TSS) for improving the sensing and communication performance. In the first stage, based on the assumptions that the perfect channel state information (CSI) of the AE and statistical CSI of the PE are known, the communication and sensing beamforming problem is formulated with the objective of minimizing the weighted sum of the beampattern matching mean squared error (MSE) and cross-correlation, subject to the secure transmission constraint. To tackle the non-convexity, we propose a semi-definite relaxation (SDR) algorithm and a reduced-complexity zero-forcing (ZF) algorithm. Then, the scenarios are further extended to more general cases with imperfect AE CSI and unknown PE CSI. To further improve the communication performance, the second-stage problem is developed to optimize the secrecy rate threshold under the radar performance constraint. Finally, numerical results demonstrate the superiority of the proposed scheme in terms of sensing and secure communication. © 1972-2012 IEEE.

关键词： Mean square error

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Toward a further understanding of bit-based division property

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science China(Information sciences) 2017年第12期60卷 277-279页

作者： Ling SUN Meiqin WANG Key Laboratory of Cryptologic Technology and Information Security Ministry of EducationShandong University Science and Technology on Communication Security Laboratory State Key Laboratory of Cryptology P.O.Box 5159

The division property of a multiset,which is a generalization of the integral property,was proposed by Todo[1]at EUROCRYPT *** division property can precisely depict the implicit properties between ALL and BALANCE properties,it allows us to efficiently construct integral distinguisher even if the round function of the block cipher is non-bijective,bit-oriented,and low-degree.

关键词： Toward a further understanding of bit-based division property ANF

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A Distributed Self-Tallying Electronic Voting System Using the Smart Contract

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Chinese Journal of Electronics 2024年第4期33卷 1063-1076页

作者： Jingyu YAO Bo YANG Tao WANG Wenzheng ZHANG School of Computer Science Shaanxi Normal University State Key Laboratory of Integrated Services Networks Xidian University Science and Technology on Communication Security Laboratory

For electronic voting(e-voting) with a trusted authority, the ballots may be discarded or tampered, so it is attractive to eliminate the dependence on the trusted party. An e-voting protocol, where the final voting result can be calculated by any entity, is known as self-tallying e-voting protocol. To the best of our knowledge, addressing both abortive issue and adaptive issue simultaneously is still an open problem in self-tallying e-voting *** Ethereum blockchain with cryptographic technologies, we present a decentralized self-tallying e-voting protocol. We solve the above problem efficiently by utilizing optimized Group Encryption Scheme and standard Exponential El Gamal Cryptosystem. We use zero-knowledge proof and homomorphic encryption to protect votes' secrecy and achieve self-tallying. All ballots can be verified by anyone and the final voting result can be calculated by any entity. In addition, using the paradigm of score voting and “1-out-of-k” proof, our e-voting system is suitable for a wide range of application scenarios. Experiments show that our protocol is more competitive and more suitable for large-scale voting.

关键词： Electronic voting systems Smart contracts Blockchains Cryptocurrency Electronic voting Homomorphic encryption Standards

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Secure searchable public key encryption against insider keyword guessing attacks from indistinguishability obfuscation

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science China(Information sciences) 2018年第3期61卷 228-230页

作者： Lixue SUN Chunxiang XU Mingwu ZHANG Kefei CHEN Hongwei LI Center for Cyber Security School of Computer Science and EngineeringUniversity of Electronic Science and Technology of China School of Computer Science Hubei University of Technology School of Science Hangzhou Normal University Laboratory of Science and Technology on Communication Security

Public key encryption with keyword search(PEKS)enables one to search encrypted data containing some keyword without decrypting the data in public key *** et al.[1]introduced the notion of PEKS,but later Byun et al.[2]showed the scheme in[1]is vulnerable to the outsider/insider keyword guessing attacks(KGA).Many previous PEKS studies have tackled the

关键词： SKS IND PKI MAC SKR Mac PKR

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Constructions of vectorial Boolean functions with good cryptographic properties

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science China(Information sciences) 2016年第11期59卷 233-234页

作者： Luyang LI Weiguo ZHANG State Key Laboratory of Integrated Services Networks Xidian University Science and Technology on Communication Security Laboratory

Dear editor,Vectorial Boolean functions play an important role in designing certain stream cipher schemes,such as filtering generators and nonlinear *** be used in the aforementioned schemes,vectorial Boolean functions must satisfy several *** best affine and linear approximation attacks show that high nonlinearity is significant for designing cryptographically strong ***-immune functions were first introduced by Siegenthaler[1]in order to construct

关键词： In Constructions of vectorial Boolean functions with good cryptographic properties

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