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Chongfu Zhang - IEEE Xplore Author Profile

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Industrial information transmitted through data centers (DCs) is increasingly exposed to more widespread and powerful attack threats. In this article, we propose a chaotic encryption scheme that utilizes a reversible hybrid evolution life-like cellular automata (CA) and 4D modulation to enhance industrial information security. A chaotic permutation based on the logistic-adjusted-sine map and 4D mo...Show More
In this article, we propose a method to encrypt the permutation information (PI) and insert the synchronization head based on digital chaos and constellation shaping for orthogonal frequency division multiplexing-free space optical (OFDM-FSO) communication. Probabilistic shaping technology can improve laser emission efficiency, but it will generate the PI, which, transmitted separately, will occup...Show More
As data centers continue to grow in size and importance, protecting the security of data during connectivity becomes critical. In this paper, we propose a deoxyribonucleic acid (DNA) reconfigurable chaotic sequence multilayer encryption scheme for 4-level pulse amplitude modulation (PAM 4) systems, which can enhance significantly the security of data center interconnection (DCI). This method emplo...Show More
Emerging intelligent reflecting surfaces (IRSs) significantly improve system performance, but also pose a huge risk for physical layer security. Existing works have illustrated that a disco IRS (DIRS), i.e., an illegitimate IRS with random time-varying reflection properties (like a “disco ball”), can be employed by an attacker to actively age the channels of legitimate users (LUs). Such active cha...Show More
When reconfigurable intelligent surface (RIS) is used to initiate attacks without actively generating sources of jamming signals, signal cancellation attacks (SCAs) are the main methods. However, a passive RIS (PRIS) requires a lot of reflecting elements in order to obtain considerable SCAs when attacked systems limit signal leakage to non-target receivers. This puts the PRIS at high risk of being...Show More
This article proposes a redundancy-free multiple phase-offset based key distribution (MPO-KD) scheme for solving the physical-layer session key agreement in optical data center interconnections (DCIs). High-dimensional chaotic encryption is a promising technology expected to provide better security for massive-scale data transmission in DCIs. Considering the huge key space introduced by hyper-chao...Show More
Terahertz (THz) communication is one of the most important technologies of future 6G due to its ultra-bandwidth. In THz massive multiple-input multiple-output (MIMO) systems, the performance of beam tracking is significantly degraded due to the beam split effect. In this paper, we propose an optical true time delay compensation network (OTTDCN)-based beam tracking scheme. In the proposed OTTDCN-ba...Show More
Reconfigurable intelligent surfaces (RISs), as a promising technology for 6 G communications, have received considerable attention. Herein, we investigate the downlink precoding in the RIS-aided millimeter-wave (mmWave) multi-user multiple-input single-output (MU-MISO) system, where the access point (AP) uses hybrid digital and analog precoders. Due to the constraints of practical hardware and the...Show More
Illegal intelligent reflecting surfaces (I-IRSs), i.e., the illegal deployment and utilization of IRSs, impose serious harmful impacts on wireless networks. The existing I-IRS-based illegal jammer (IJ) requires channel state information (CSI) or extra power or both, and therefore, the I-IRS-based IJ seems to be difficult to implement in practical wireless networks. To raise concerns about signific...Show More
Difficulties in controlling IRSs to form the optimized passive beamforming have rarely been considered in intelligent reflecting surface (IRS)-aided systems, which are summarized as follows: 1) sending the optimized passive precoding vectors to the IRS controller incurs significant control overheads; 2) implementing the optimized passive precoding needs to set massive modes in the IRS control circ...Show More
Reconfigurable intelligent surface (RIS) aided continuous cooperative jamming (CCJ) attack could enable jamming sources to be exposed to systems of enemies. Thus, enemies can mitigate the jamming attack by employing anti-jamming techniques. For a CCJ attack to be effective, both jamming sources and jamming signals need to be hidden from enemies. Hence, we propose to jam a hostile receiver in an in...Show More
In this article, we first propose a novel secret key update scheme only with a single support vector machine (SVM). To achieve robust and efficient key management for secure orthogonal frequency division multiple access-based passive optical network (OFDMA-PON). The key sequences required to be shared between multiple optical network units (ONUs) and optical line terminal (OLT) are converted into ...Show More
The issue of information security in photonics environment has attracted more and more attention, especially when the secure communication of optical digital images has become a research hotspot. In this paper, we propose a hybrid encryption scheme for color images in the frequency and spatial domains based on double random transform and memristor hyperchaotic system. Firstly, we decompose the col...Show More
We propose a novel security enhancement technique for physical layer secure orthogonal frequency division multiplexed-based passive optical network (OFDM-PON) using chaotic Hilbert motion. By using chaos to construct Hilbert motion, the traversal and the scrambling of two-dimensional (2D) symbol matrix are completed. To enhance the security of the key, we use the key space as an encryption object ...Show More
To reduce the traffic pressure brought by dense access to the Base Station (BS) and improve the signal transmission performance in Device to Device (D2D), we propose a hybrid frequency band communication scheme based on Convolutional Neural Network (CNN). In this scheme, the receiver obtains the link information (power and arrival angle), fed back to the BS where have well-trained CNN, and CNN thr...Show More
In this paper, we propose a Chaotic Probability Constellation Shaping (CPCS) method in Free-Space Optical (FSO) communication to enhance security and improve the performance of the transmission data. Gather as many points as possible in the middle via chaotic controlling. The influence of turbulence on the signal transmission can be attenuated to the minimum. In the simulation, a ratio of 56Gb/s 1...Show More
Reconfigurable Intelligent Surface (RIS) and Non-Orthogonal Multiple Access (NOMA) are two promising technologies for future Beyond Fifth-Generation (B5G) and the Sixth Generation (6G). Herein, we investigate the RIS-aided millimeter-wave (mmWave) NOMA system, where user grouping, passive beamforming, hybrid precoding, as well as power allocation are jointly optimized to maximize the system sum ra...Show More
Inter-user interference (IUI) engineering is utilized to degrade eavesdropping and enhance the physical layer security (PLS). In this letter, we propose a secure transmission strategy via IUI engineering for an intelligent reflecting surface (IRS)-assisted non-orthogonal multiple access (NOMA) system without eavesdroppers channel state information (CSI). We aim to reduce the signal-to-interference...Show More
This letter is concerned with tackling both of the multi-access interference (MAI) and the follower jamming (FJ) in frequency-hopping multiple-access (FHMA) systems via novel FH sequence (FHS) design. We consider low-hit-zone (LHZ) FHS which provides lower MAIs in quasi-synchronous FHMA systems but suffers from FJ attack. We introduce an improved LHZ-FHS with wide-gap (i.e., WG-LHZ-FHS) for the ne...Show More
In order to improve the signal transmission performance and physical layer security in orthogonal frequency division multiplexing-based passive optical network (OFDM-PON), we propose a constellation shaping chaotic encryption (CSCEn) scheme with controllable statistical distribution. In this scheme, a quadrature amplitude modulation (QAM) symbol sequence is divided into several sub-sequences, and ...Show More
In this paper, we investigate directional millimeter-wave cloud radio access network systems using optically centralized beamforming. To evaluate the impact of beam alignment, the beamforming gain function and the cumulative distribution function are analyzed.Show More
The low-cost implementation of optical true time delay-based hybrid beamforming is proposed for millimeter-wave cloud radio access networks, where all phase control modules are centrally deployed. Moreover, multi-cell coordinated beamforming is exploited for interference management.Show More
Based on polarization multiplexing and coherent detection, a reconfigurable and efficient photonic channelized receiver is proposed. To show the reconfigurability, two broadband signals with different center frequencies and bandwidths are channelized into different-size sub-channels respectively.Show More
A low-cost millimeter-wave NOMA-MIMO system by exploiting optical true time delay-based hybrid beamforming is proposed, where only one weight control unit is required. The obtained results show the proposed scheme achieves high spectral efficiency.Show More