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A Fast Method for Shortest-Path Cover Identification in Large Complex Networks

Computers, Materials & Continua 2020年第5期63卷 705-724页

作者： Qiang Wei Guangmin Hu Chao Shen Yunfei Yin School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu611731China National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu610041China MOE Key Lab for Intelligent Networks and Network Security Xi’an Jiaotong UniversityXi’an710049China The Electronic Engineering Department Universidad de SevillaSeville41004Spain School of Astronautics Harbin Institute of TechnologyHarbin150001China

Fast identifying the amount of information that can be gained by measuring a network via shortest-paths is one of the fundamental problem for networks exploration and ***,the existing methods are time-consuming for even moderate-scale *** this paper,we present a method for fast shortest-path cover identification in both exact and approximate scenarios based on the relationship between the identification and the shortest distance *** effectiveness of the proposed method is validated through synthetic and real-world *** experimental results show that our method is 105 times faster than the existing methods and can solve the shortest-path cover identification in a few seconds for large-scale networks with millions of nodes and edges.

关键词： Network discovery shortest-path cover shortest-path distance query large complex networks

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Experimental demonstration of 4-user quantum access network based on passive optical network 49

Experimental demonstration of 4-user quantum access network ...

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49th European Conference on Optical communications, ECOC 2023

作者： Pan, Yan Bian, Yiming Wang, Heng Dou, Jiayi Shao, Yun Pi, Yaodi Ye, Ting Yang, Jie, 2 Li, Yang Huang, Wei Yu, Song Zhang, Yichen Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China State Key Laboratory of Information Photonics and Optical Communications School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781839539954

A 4-user high-compatibility quantum access network using coherent states is experimentally demonstrated based on passive optical network. The achieved average secret key rate is around 4.1 Mbps between the transmitter and each one user, which is two orders-of-magnitude higher than previous demonstrations. © The Institution of Engineering & technology 2023.

关键词： Passive optical networks

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Identification of block ciphers under CBC mode 8

Identification of block ciphers under CBC mode

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8th International Congress of Information and communication technology, ICICT 2018

作者： Tan, Cheng Deng, Xiaoyan Zhang, Lijun Science and Technology on Communication Security Laboratory No. 8 of Venture Road Chengdu Sichuan Province610041 China College of Applied Mathematics Chengdu University of Information Technology No. 24 of Xuefu Road Chengdu Sichuan Province610103 China

It has been challenging work to identify block ciphers under CBC mode over the past few decades. But we can still conduct the identification of block ciphers under CBC mode if enough ciphertext streams are available. In this paper, we consider the identification of 5 frequently used block ciphers, AES, DES, 3DES, RC5 and Blowfish. For multi-class identification, the identification rate of 5 block ciphers can reach above 90% as long as the size of ciphertext file is larger than 100 KB when same key and same IV for training and testing ciphertext files. For one to one identification, we identify AES from other 4 block ciphers on condition of different keys or different IVs for training and testing ciphertext files. We can obtain an identification rate of above 97% when the size of ciphertext file is equal to 100 KB. Besides, even if the size of ciphertext file is only 4 KB, the average identification rate is still higher than 80%. © 2018 The Authors. Published by Elsevier Ltd.

关键词： security of data

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An Asymmetric Channel Attack Monitoring Method for Round-Trip Fiber Time Synchronization System 37

An Asymmetric Channel Attack Monitoring Method for Round-Tri...

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37th European Frequency and Time Forum, EFTF 2024

作者： Xu, Xuesong Zhang, Yichen Xu, Hailong Bian, Yiming Li, Yang Xu, Bingjie Yu, Song School of Electronic Engineering Beijing University of Posts and Telecommunications State Key Laboratory of Information Photonics and Optical Communications Beijing100876 China Institute of Southwestern Communication Science and Technology on Communication Security Laboratory Chengdu610041 China

ISBN: (纸本)9798350354270

We present a method for monitoring potential asymmetric channel attacks within a round-trip fiber time synchronization system. This is achieved by observing and tracking the time difference at the remote end. Experimental results show that the attacking operation causes unavoidably obvious fluctuations in time difference, with the time difference measured by our monitoring module changing by nanoseconds when an attack occurs, which can be used for attack recognition. Our work provides a reference for further improving the security of fiber time synchronization systems and lays the foundation for the development of more advanced time synchronization attack identification techniques. © 2024 IEEE.

关键词： asymmetric channel attack attack monitoring round-trip time synchronization

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Decoy-state quantum-key-distribution-based quantum private query with error tolerance bound

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Physical Review A 2024年第5期109卷 052442-052442页

作者： Bin Liu Zhonghao Liang Wei Huang Fei Gao Jiayi Yuan Bingjie Xu College of Computer Science The State Key Laboratory of Networking and Switching Technology Center for Network and Information Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu 610041 China

Quantum private query (QPQ) faces many challenges in practical applications. At present, some scholars have made substantial work on overcoming channel loss, channel noise, and nonideal light sources, respectively. However, a protocol that would overcome all three of these problems has yet to materialize. We review a practical QPQ protocol that can actually work in noisy channels. This protocol has an upper bound on tolerable errors based on the required level of security and reliability. Then, we study the security of the above QPQ protocol under weak coherent pulses. The results indicate that the multiphoton pulses have induced significant vulnerabilities, which seriously threatens the privacy of users. Finally, we propose a decoy-state method to solve the serious threat to user security caused by multiphoton pulses. The analysis shows that the decoy-state method significantly improves the security of the QPQ protocol under weak coherent pulses. The improved protocol can not only tolerate transmission losses and channel noise, but also overcome the security vulnerability caused by a nonideal light source.

关键词： Quantum communication Quantum error correction Quantum information theory Quantum protocols Quantum state transfer

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Simple and Fast Polarization Tracking algorithm for Continuous-Variable Quantum Key Distribution System Using Orthogonal Pilot Tone

arXiv

引用

arXiv 2023年

作者： Pan, Yan Wang, Heng Shao, Yun Pi, Yaodi Ye, Ting Zhang, Shuai Li, Yang Huang, Wei Xu, Bingjie The Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

To reduce the influence of random channel polarization variation, especially fast polarization perturbation, for continuous-variable quantum key distribution (CV-QKD) systems, a simple and fast polarization tracking algorithm is proposed and experimentally demonstrated. The algorithm is implemented by an orthogonal pilot tone scheme, one of the pilot tones is used for estimating the polarization rotation angle, and the other one is used for compensating the polarization perturbation introduced phase noise. Meanwhile, residual effects are compensated precisely with the help of a real-valued FIR filter. In this case, the excess noise introduced by polarization perturbation is effectively suppressed. Experimental results show that the polarization scrambling rate ≥ 12.57 krad/s can be tracked by using the proposed algorithm, and a good estimated parameters performance is achieved. Compared to conventional polarization tracking algorithms such as the constant modulus algorithm (CMA), experimental results show that the polarization tracking capability of the proposed algorithm is significantly improved. Furthermore, much faster polarization tracking performance is evaluated by digital simulations, and the simulation results show that about 188.50 Mrad/s can be tracked by the proposed algorithm. Thus, our method provides effective technology for the practical application of fiber-based CV-QKD. © 2023, CC BY.

关键词： Polarization

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Performance analysis for OFDM-based multi-carrier continuous-variable quantum key distribution with arbitrary modulation protocol

arXiv

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arXiv 2022年

作者： Wang, Heng Pan, Yan Shao, Yun Pi, Yaodi Ye, Ting Li, Yang Zhang, Tao Liu, Jinlu Yang, Jie Ma, Li Huang, Wei Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

Multi-carrier continuous-variable quantum key distribution (CV-QKD) is considered to be a promising way to boost the secret key rate (SKR) over the existing single-carrier CV-QKD scheme. However, the extra excess noise induced in the imperfect multi-carrier quantum state preparation process of N subcarriers will limit the performance of the system. Here, a systematic modulation noise model is proposed for the multi-carrier CV-QKD based on the orthogonal frequency division multiplexing (OFDM). Subsequently, the performance of multi-carrier CV-QKD with arbitrary modulation protocol (e.g. QPSK, 256QAM and Gaussian modulation protocol) can be quantitatively evaluated by combining the security analysis method of the single-carrier CV-QKD. Under practical system parameters, the simulation results show that the SKR of the multi-carrier CV-QKD can still be significantly improved by increasing the carrier number N even with imperfect practical modulations. Specifically, the total SKR of multi-carrier CV-QKD can be optimized by carefully choosing N. The proposed model provides a feasible theoretical framework for the future multi-carrier CV-QKD experimental implementation. © 2022, CC BY.

关键词： Quantum cryptography

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An Invocation Chain Test and Evaluation Method Based on Knowledge Graph

An Invocation Chain Test and Evaluation Method Based on Know...

引用

2020 International Conference on Networking and Network Applications, NaNA 2020

作者： Zhao, Yue Yang, Yarang Tian, Bo Zhang, Tianle Science and Technology on Communication Security Laboratory Chengdu610041 China College of Physics and Electrical Engineering Kashi University Kashi844006 China Cyberspace Institute of Advanced Technology Guangzhou University Guangzhou510006 China

ISBN: (纸本)9781728189543

The paper, on basis of the software vulnerability description specification, works out the vulnerability knowledge base for vulnerability combination, completes the specification modeling of target environment information and vulnerability description, proposes the vulnerability instantiation attack mode, obtains the atomic attack set, improves the process of atomic attack node combination, and finally proposes the automatic construction algorithm of invocation chain to get the vulnerability combination information and invocation chain information of the target system. The experimental results show that the invocation chain test and evaluation method based on knowledge graph can evaluate the system risk quantitatively rather than qualitatively by calculating comprehensive probability on all test sequences. © 2020 IEEE.

关键词： Specifications

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A Task Scheduling Algorithm based on QoS-Driven in Cloud Computing

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Procedia Computer science 2013年 17卷 1162-1169页

作者： Xiaonian Wu Mengqing Deng Runlian Zhang Bing Zeng Shengyuan Zhou School of Information and Communication Guilin University of Electronic Technology Guilin 541004 China Science and Technology on Communication Security Laboratory Chengdu 610041 China

Quality of Service is an inevitable issue needing to be deal with in task scheduling of cloud computing. This paper proposes a task scheduling algorithm based on QoS-driven for cloud computing. Firstly, in order to reflect the precedence relation of tasks, the proposed algorithm computes the priority of tasks according to the special attributes of tasks, and then sorts tasks by priority. Secondly, the algorithm evaluates the completion time of each task on different services, and schedules each task onto a service which can complete the task as soon as possible according to the sorted task queue. The experimental results based on CloudSim show that the algorithm can achieve good performance and load balancing by QoS driving from both priority and completion time.

关键词： Cloud computing Task scheduling Quality of service Priority

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A Trust Evaluation Model for Cloud Computing

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Procedia Computer science 2013年 17卷 1170-1177页

作者： Xiaonian Wu Runlian Zhang Bing Zeng Shengyuan Zhou School of Information and Communication Guilin University of Electronic Technology Guilin 541004 China Science and Technology on Communication Security Laboratory Chengdu 610041 China

Trust has attracted extensive attention in social science and computer science as a solution to enhance the security of the system. This paper proposes a trust evaluation model based on D-S evidence theory and sliding windows for cloud computing. The timeliness of the interaction evidence as the first-hand evidence is reflected by introducing sliding windows. The direct trust of entities is computed based on the interaction evidence by D-S evidence theory. The conflict of the recommendation trust as the second-hand evidence is eliminated with a help of an improved fusion approach as far as possible. Finally, the combination of the recommendation trust exposes the credibility of entities. Experimental results show that the proposed model is effective and extensible.

关键词： Cloud computing Trust evaluation Evidence theory Sliding windows

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