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arXiv 2024年

作者： Yun, M.-R. Shan, Zheng Sun, Li-Li Yan, L.-L. Jia, Yu Su, S.-L. Chen, G. School of Physics Laboratory of Zhongyuan Light Key Laboratory of Materials Physics of Ministry of Education Zhengzhou University Zhengzhou450052 China State Key Laboratory of Mathematical Engineering and Advanced Computing Henan Zhengzhou450001 China College of Physics Tonghua Normal University Tonghua134000 China Institute of Quantum Materials and Physics Henan Academy of Sciences Zhengzhou450046 China Key Laboratory for Special Functional Materials of Ministry of Education School of Materials and Engineering Henan University Kaifeng475001 China

Due to its significant application in reducing algorithm depth, fSim gates have attracted a lot of attention. However, during the implementation of quantum gates, fluctuations in control parameters and decoherence caused by the environment may lead to a decrease in the fidelity of the gate. Implementing the fSim gate that is robust to these factors in one step remains an unresolved issue. In this manuscript, we propose a one-step implementation of the nonadiabatic geometric fSim gate composed of a nonadiabatic holonomic controlled phase (CP) gate and a nonadiabatic noncyclic geometric iSWAP gate with parallel paths in a tunable superconducting circuit. Compared to the composite nonadiabatic geometric fSim gate composed of a nonadiabatic holonomic CP gate and a nonadiabatic geometric iSWAP gate, our scheme only takes half the time and demonstrates robustness to parameter fluctuations, as well as to environmental impacts. Moreover, the scheme does not require complex controls, making it very easy to implement in experiments, and can be achieved in various circuit structures. Our scheme may provide a promising path toward quantum computation and simulation. Copyright © 2024, The Authors. All rights reserved.

关键词： Environmental impact

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Spreading Dynamics of Random Walks in Complex Networks 8

Spreading Dynamics of Random Walks in Complex Networks

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8th International Conference on Information Technology: IoT and Smart City, ICIT 2020

作者： Hao, Yaohui Liu, Hongbo Sun, Jiajia Gao, Liwei Information Engineering University Zhengzhou China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou450001 China

ISBN: (纸本)9781450388559

The study of spreading dynamics is an important foundation to analyze the spread of viruses orrumors. The general method of analyzing spreading dynamics is based on model, such as SI model, SISmodel, SIR model,ect. However, the spreading dynamics in the network is affected by many factors and represents some randomicity. So, in this paper, we propose Random Walks(RW) spreading model for opinions to illustrate the spreading behavior in networks, for instance, the random networks and BA scale-free networks. With MonteCarlo simulation method, the results show that the spreading speed of BA scale-free network is more quickly than that of ER random network, when the spreading probability β is small. But, with the increase of β, the spreading speed of ER random network increases gradually and exceeds that of BA scale-free network. © 2020 ACM.

关键词： Complex networks

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Towards Comprehensively Understanding the Run-time Security of Programmable Logic Controllers: A 3-year Empirical Study

arXiv

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arXiv 2022年

作者： Ma, Rongkuan Wei, Qiang Wang, Jingyi Zhu, Shunkai Ji, Shouling Cheng, Peng Jia, Yan Wang, Qingxian State Key Laboratory of Mathematical Engineering and Advanced Computing Henan Zhengzhou450001 China State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou310000 China College of Cyber Science Nankai University Tianjin China

Programmable Logic Controllers (PLCs) are the core control devices in Industrial Control Systems (ICSs), which control and monitor the underlying physical plants such as power grids. PLCs were initially designed to work in a trusted industrial network, which however can be brittle once deployed in an Internet-facing (or penetrated) network. Yet, there is a lack of systematic empirical analysis of the run-time security of modern real-world PLCs. To close this gap, we present the first large-scale measurement on 23 off-the-shelf PLCs across 13 leading vendors. We find many common security issues and unexplored implications that should be more carefully addressed in the design and implementation. To sum up, the unsupervised logic applications can cause system resource/privilege abuse, which gives adversaries new means to hijack the control flow of a runtime system remotely (without exploiting memory vulnerabilities);2) the improper access control mechanisms bring many unauthorized access implications;3) the proprietary or semi-proprietary protocols are fragile regarding confidentiality and integrity protection of run-time data. We empirically evaluated the corresponding attack vectors on multiple PLCs, which demonstrates that the security implications are severe and broad. Our findings were reported to the related parties responsibly, and 20 bugs have been confirmed with 7 assigned CVEs. Copyright © 2022, The Authors. All rights reserved.

关键词： Programmable logic controllers

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LinNet: linear network for efficient point cloud representation learning 24

LinNet: linear network for efficient point cloud representat...

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Proceedings of the 38th International Conference on Neural Information Processing Systems

作者： Hao Deng Kunlei Jing Shengmei Cheng Cheng Liu Jiawei Ru Jiang Bo Lin Wang State-Province Joint Engineering and Research Center of Advanced Networking and Intelligent Information Services School of Information Science and Technology Northwest University and Shaanxi Key Laboratory of Higher Education Institution of Generative Artificial Intelligence and Mixed Reality School of Software Engineering Xi'an Jiaotong University and Department of Computing The Hong Kong Polytechnic University

ISBN: (纸本)9798331314385

Point-based methods have made significant progress, but improving their scalability in large-scale 3D scenes is still a challenging problem. In this paper, we delve into the point-based method and develop a simpler, faster, stronger variant model, dubbed as LinNet. In particular, we first propose the disassembled set abstraction (DSA) module, which is more effective than the previous version of set abstraction. It achieves more efficient local aggregation by leveraging spatial anisotropy and channel anisotropy separately. Additionally, by mapping 3D point clouds onto 1D space-filling curves, we enable parallelization of down-sampling and neighborhood queries on GPUs with linear complexity. LinNet, as a purely point-based method, outperforms most previous methods in both indoor and outdoor scenes without any extra attention, and sparse convolution but merely relying on a simple MLP. It achieves the mIoU of 73.7%, 81.4%, and 69.1% on the S3DIS Area5, NuScenes, and SemanticKITTI validation benchmarks, respectively, while speeding up almost 10x times over PointNeXt. Our work further reveals both the efficacy and efficiency potential of the vanilla point-based models in large-scale representation learning. Our code will be available at https://***/DengH293/LinNet.

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A Selection Strategy for Network Security Defense Based on a Time Game Model

A Selection Strategy for Network Security Defense Based on a...

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Digital Society and Intelligent Systems (DSInS), International Conference on

作者： Pengyu Sun Hengwei Zhang Junqiang Ma Chenwei Li Yan Mi Jindong Wang State Key Laboratory of Mathematical Engineering and Advanced Computing Key Laboratory of Information Security of Henan Provincial Zhengzhou China

ISBN: (纸本)9781665406314

Current network assessment models often ignore the impact of attack-defense timing on network security, making it difficult to characterize the dynamic game of attack-defense effectively. To effectively manage the network security risks and reduce potential losses, in this article, we propose a selection strategy for network defense based on a time game model. By analyzing the attack-defense status by analogy with the SIR infectious disease model, construction of an optimal defense strategy model based on time game, and calculation of the Nash equilibrium of the the attacker and the defender under different strategies, we can determine an optimal defense strategy. With the Matlab simulation, this strategy is verified to be effective.

关键词： Analytical models Heuristic algorithms Games Network security Numerical simulation Nash equilibrium Real-time systems

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Timing Strategy for Active Detection of APT Attack Based on FlipIt Model and Q-learning Method

Timing Strategy for Active Detection of APT Attack Based on ...

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Digital Society and Intelligent Systems (DSInS), International Conference on

作者： Zhilin Liu Hengwei Zhang Pengyu Sun Yan Mi Xiaoning Zhang Jindong Wang State Key Laboratory of Mathematical Engineering and Advanced Computing Key Laboratory of Information Security of Henan Provincial Zhengzhou China

ISBN: (纸本)9781665406314

At present, APT attack detection mainly focuses on the specific realization of detection technology, and there is little research on the timing strategy for active detection of APT attack. This paper focuses on the problem of APT dynamic detection with timing decision intelligence. We use the FlipIt game model and reinforcement learning method of Q-learning algorithm, consider the APT attack events as an exponentially distributed random process, and the defender using the attacker’s last move time (LM-defender) to learn his optimal timing strategy using Q-Learning algorithm. The defender's reinforcement learning mechanism for the timing of the APT attack action and outputs its timing selection strategy. Simulation experiments show that compared with the existing greedy algorithm, the timing strategy based on the Q-Learning algorithm does not require the attacker's prior information under the premise, it can achieve a higher average benefit than the greedy strategy. This result provides a theoretical reference for the design of timing strategy to defend APT attack intelligently and efficient.

关键词： Greedy algorithms Adaptation models state feedback Q-learning Adaptive systems Heuristic algorithms Games

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Synthesis of Decoherence-Free Modes in Linear Quantum Passive Systems via Robust Pole Placement

Synthesis of Decoherence-Free Modes in Linear Quantum Passiv...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Zibo Miao Yu Pan Qing Gao Guangdong Key Laboratory of Intelligent Morphing Mechanisms School of Mechanical Engineering and Automation Adaptive Robotics Harbin Institute of Technology Shenzhen China State Key Laboratory of Industrial Control Technology The Institute of Cyber-Systems and Control College of Control Science and Engineering Zhejiang University Hangzhou China The School of Automation Science and Electrical Engineering Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang University Beijing China

ISBN: (数字)9781665410205

ISBN: (纸本)9781665410212

In this paper we extend our previous research on coherent observer-based pole placement approach to study the synthesis of robust decoherence-free (DF) modes for linear quantum passive systems, which is aimed at preservation of quantum information. In particular, DF modes can be generated by placing the poles on the imaginary axis via a coherent feedback design scheme, and these modes can further be simultaneously made robust against perturbations to the system parameters by minimizing the condition number associated with imaginary poles. We develop explicit algebraic conditions for the existence of such a coherent quantum controller, with the corresponding deign procedure provided. Examples are given to illustrate the process of tuning the DF modes towards perfect robustness via the proposed pole placement technique.

关键词： Perturbation methods Design methodology Quantum optics Robustness Feedback control Closed loop systems Tuning Cybernetics

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Network Attack Intention Recognition Based on Signaling Game Model and Netlogo Simulation

Network Attack Intention Recognition Based on Signaling Game...

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Digital Society and Intelligent Systems (DSInS), International Conference on

作者： Xiaoning Zhang Hengwei Zhang Chenwei Li Pengyu Sun Zhilin Liu Jindong Wang State Key Laboratory of Mathematical Engineering and Advanced Computing Key Laboratory of Information Security of Henan Provincial Zhengzhou China

ISBN: (纸本)9781665406314

With the development of attack technology, identifying the real intention of network attack and avoiding further deterioration of security situation has become a hot research topic in recent years. This paper proposes an attack intention recognition method based on signaling game model. Firstly, we generate attack intention hypotheses, and then calculate the probability of each attack intention by solving game equilibrium. Experiments show that the method can effectively improve the accuracy of attack intention recognition from the perspective of the revenue.

关键词： Games Probability Cognition Complexity theory Security Intelligent systems Game theory

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Abuse-Resistant Deniable Encryption

SSRN

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SSRN 2023年

作者： Cao, Yanmei Wei, Jianghong Xiang, Yang Susilo, Willy Chen, Xiaofeng State Key Laboratory of Integrated Service Networks Xidian University Xi’an710071 China State Key Laboratory of Mathematical Engineering and Advanced Computing PLA Strategic Support Force Information Engineering University Zhengzhou450001 China School of Software and Electrical Engineering Swinburne University of Technology MelbourneVIC3122 Australia Institute of Cybersecurity and Cryptology University of Wollongong WollongongNSW2522 Australia

Deniable encryption (DE) allows private communication over an insecure channel even under the coercion. That is, after an adversary forces communication participants to reveal their secret keys and randomness used during the communication, the message confidentiality can still be preserved. Since its introduction, a large body of studies have been made to improve the DE system in terms of efficiency, security definition and functionality, which is the focus of this paper. However, as far as we know, none of existing DE systems considers the abuse of deniability caused by malicious users, which is a crucial feature from the view of practical applications of DE. For instance, a malicious user (e.g., an employee who holds some sensitive documents and intends to sell these confidential contents for obtaining financial gain) can utilize a DE system to transmit the confidential content without the risk of being caught, which is extremely dangerous to the interests and security of his/her organization. In this paper, to mitigate this threat, we formally define the syntax and security notions of abuse-resistant deniable encryption, which restricts what users can deny. Then, we put forward a concrete construction of abuse-resistant DE scheme, and prove its security under the assumptions of indistinguishability obfuscation and oneway function. Compared with other related work, the proposed construction has advantages in terms of functionality and ciphertext rate simultaneously. © 2023, The Authors. All rights reserved.

关键词： Data obfuscation

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New Insights into the Microstructure and Tribological Behaviors of the Boronized Layer on Inconel 718 Alloy Surface

SSRN

引用

SSRN 2024年

作者： Wu, Zhenjiang Chen, Shuqun Shao, Mengxue Liu, Yue Li, Yangzhong Peng, Jian Li, Hongyi Wang, Jinshu Key Laboratory of Advanced Functional Materials Education Ministry of China College of Materials and Engineering Beijing University of Technology Beijing100124 China Beijing University of Technology China High Performance Computing Department National Supercomputing Center in Shenzhen Guangdong Shenzhen518055 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Boronizing of nickel based superalloys is of great interests in aerospace industry due to the excellent wear resistance, however, little information has been known on its phase formation and load-dependent wear mechanism. In this work, high quality boronized layer was developed on the Inconel 718 alloy by powder pack-boriding process at 850 °C for 6 h under argon atmosphere. The microstructure characteristics and load-dependent tribological behaviors of the boronized layers were systematically investigate. It is found that the main boronized layer on Inconel 718 alloy consists of a ~11.3 um thick compound layer with nanocrystalline (Ni,Fe)23B6 and (Cr,Fe)B grains, and a ~10.9 um thick diffusion layer with dendritic Cr2B precipitation within the matrix. The phase evolution of the boronizing layer are explainable by thermodynamic modeling of Ni-Cr-B system and the phase stability for metastable Ni-B compounds is confirmed by DFT simulation. Due to the good interfacial bonding strength and high microhardness value, the boronized layer displays excellent wear resistance against Si3N4 ceramic balls at room temperature. In particular, the wear rates of the specimens under applied loads of 10-20 N are higher than those in the 50-100 N loads case. The latter is mainly facilitated by the formation of lubricating boron oxide tribolayer on friction ball surface. We believe the findings in present work will contribute to a deeper understanding of the boronizing treatment in nickel-based superalloys. © 2024, The Authors. All rights reserved.

关键词： Wear resistance

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