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4th IEEE International Conference on Data Science in Cyberspace, DSC 2019

作者： Zhang, Yuntao Liu, Tong Wang, Zhongru Ruan, Qiang Fang, Binxing Key Laboratory of Trustworthy Distributed Computing and Service Beijing University of Posts and Telecommunications Ministry of Education Beijing China Zhejiang Lab Hangzhou China Beijing DigApis Technology Co. Ltd Beijing China

ISBN: (纸本)9781728145280

Recently, automated testing for software vulnerability finding and exploitation has attracted more and more attention, due to the high scalability and efficiency. However, it is non-trivial and challenging since the existing methods have limited effectiveness to discover vulnerabilities, that are exploitable to hack the software. To address these challenges, we propose an Automated Vulnerability Discovery and Exploitation framework, AutoDE, which aims to improve the effectiveness of the vulnerability discovery and exploitation. In the vulnerability discovery stage, we propose Anti-Driller to alleviate the 'path explosion' problem. It first generates a specific input through the symbolic execution by using the control ?ow graph (CFG), then leverages a mutation-based fuzzer to mutate this case to find vulnerabilities which can avoid unqualified mutation. In the vulnerability exploitation stage, we analyze the characteristics of vulnerabilities and then propose to generate exploits that produce a shell based on the detected vulnerabilities with several attack techniques. We have conducted extensive experiments on the RHG 2018 challenge dataset and the BCTF-RHG 2019 challenge dataset. The experimental results clearly demonstrate the effectiveness and scalability of the proposed framework. © 2019 IEEE.

关键词： Scalability

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Threshold-Assisted Soft-Output Direct Detection FTN Algorithm for Bandwidth-Limited Systems

Threshold-Assisted Soft-Output Direct Detection FTN Algorith...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Shuangyue Liu Ji Zhou Mengqi Guo Xizi Tang Zhongliang Sun Han Cui Yueming Lu Yaojun Qiao State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing China Jinan University Guangzhou China Key Laboratory of Trustworthy Distributed Computing and Service Beijing University of Posts and Telecommunications Ministry of Education Beijing China

A threshold-assisted soft-output direct detection faster than Nyquist (SO-DD-FTN) is proposed to compensate bandwidth-limitation impairments in 56-Gb/s PAM-4 systems using 10G-class optics. Experimental results show t... 详细信息

ISBN: (数字)9781943580828

ISBN: (纸本)9781728176567

关键词： Degradation Asia Optics Optical fiber communication Computational complexity Photonics

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Sentence segmentation for classical Chinese based on LSTM with radical embedding

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The Journal of China Universities of Posts and Telecommunications 2019年第2期26卷 1-8页

作者： Han Xu Wang Hongsu Zhang Sanqian Fu Qunchao Liu Jun School of software Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China Key Laboratory of Trustworthy Distributed Computing and Service (BUPT)Ministry of EducationBeijing 100876China The Key Laboratory of Rich-Media Knowledge Organization and Service of Digital Publishing Content Institute of Scientific and Technical Information of ChinaBeijing 100038China Insitute of Quantitative Social Science Harvard UniversityCambridgeMAUSA Department of statistics Harvard UniversityCambridgeMAUSA

A low-than character feature embedding called radical embedding is proposed,and applied on a long-short term memory(LSTM) model for sentence segmentation of pre-modern Chinese *** dataset includes over 150 classical Chinese books from 3 different dynasties and contains different literary ***-conditional random fields(LSTM-CRF) model is a state-of-the-art method for the sequence labeling *** model adds a component of radical embedding,which leads to improved *** results based on the aforementioned Chinese books demonstrate better accuracy than earlier methods on sentence segmentation,especial in Tang’s epitaph texts(achieving an F1-score of 81.34%).

关键词： LSTM radical embedding sentence segmentation

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SWRR:The Link Scheduling Algorithm Based on Weighted Round-Robin

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Computers, Materials & Continua 2019年第6期59卷 965-982页

作者： Tianbo Lu Ru Yan Chao Li Lihua Yin Hao Chen Xieyu Zou School of Software Engineering Beijing University of Posts and TelecommunicationsBeijing100876China Key Laboratory of Trustworthy Distributed Computing and Service(Beijing University of Posts and Telecommunications) Ministry of EducationBeijing100876China Cyberspace Institute of Advanced Technology Guangzhou UniversityGuangzhou510006China Department Computer Science and Engineering The University of Texas at ArlingtonArlington76091USA

With the rapid development of the Internet,people pay more and more attention to the protection of *** second-generation onion routing system Tor is the most commonly used among anonymous communication systems,which can be used to protect user privacy *** recent years,Tor’s congestion problem has become the focus of attention,and it can affect Tor’s performance even user ***,we investigate the causes of Tor network congestion and summarize some link scheduling algorithms proposed in recent *** we propose the link scheduling algorithm SWRR based on WRR(Weighted Round Robin).In this process,we design multiple weight functions and compare the performance of these weight functions under different congestion conditions,and the appropriate weight function is selected to be used in our algorithms based on the experiment ***,we also compare the performance of SWRR with other link scheduling algorithms under different congestion conditions by experiments,and verify the effectiveness of the algorithm SWRR.

关键词： Weighted Round-Robin Tor congestion control link scheduling anonymous communication

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QPSK-Assisted MIMO Equalization for 800-Gb/s/λ DP-256QAM Systems

QPSK-Assisted MIMO Equalization for 800-Gb/s/λ DP-256QAM Sy...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Siqi Liu Shuangyue Liu Xizi Tang Mengqi Guo Yueming Lu Yaojun Qiao State Key Laboratory of Information Photonics and Optical Communications School of Information and Communication EngineeringBeijing University of Posts and Telecommunications Beijing China Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education School of Cyberspace SecurityBeijing University of Posts and Telecommunications Beijing China

A QPSK-assisted MIMO equalization is investigated to compensate bandwidth limitation for 800-Gb/s/λ DP-256QAM systems with only 25G-class optics. Compared with conventional MIMO equalization, the proposed equalizatio... 详细信息

ISBN: (数字)9781943580828

ISBN: (纸本)9781728176567

关键词： Bandwidth Optics Optical fiber communication Optical noise MIMO communication Signal to noise ratio Photonics

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QPSK Pilot-Aided Carrier Phase Recovery Algorithm for 800-Gb/s/λ DP-256QAM Transmission

QPSK Pilot-Aided Carrier Phase Recovery Algorithm for 800-Gb...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Han Cui Xuekai Xu Shuangyue Liu Yueming Lu Yaojun Qiao State Key Laboratory of Information Photonics and Optical Communications School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education School of Cyberspace Security Beijing University of Posts and Telecommunications Beijing China

A QPSK pilot-aided carrier phase recovery algorithm is investigated for 800-Gb/s/λ DP-256QAM transmission systems. Simulation results show that, compared with BPS, this proposed algorithm reduces by 99% computational... 详细信息

ISBN: (数字)9781943580828

ISBN: (纸本)9781728176567

关键词： Phase shift keying Simulation Optical fiber communication Optical noise Computational complexity Signal to noise ratio Photonics

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Carrier Phase Recovery Exploiting Recursive Blind Phase Search Algorithm for Probabilistic Shaping 64QAM Systems

Carrier Phase Recovery Exploiting Recursive Blind Phase Sear...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Jin Hu Zhongliang Sun Xuekai xu Yueming Lu Yaojun Qiao State Key Laboratory of Information Photonics and Optical Communications School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education School of Cyberspace Security Beijing University of Posts and Telecommunications Beijing China

Conventional BPS algorithm fails on probabilistic shaping signals when using practical length of noise rejection filters. The recursive BPS algorithm is implemented and verified to achieve a gain of more than 1 dB.

ISBN: (数字)9781943580828

ISBN: (纸本)9781728176567

关键词： Optical filters Simulation Filtering algorithms Probabilistic logic Optical fiber communication Gain Photonics

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Pulmonary tuberculosis detection model of chest X-ray images using convolutional neural network

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The Journal of China Universities of Posts and Telecommunications 2018年第6期25卷 1-6页

作者： He Jin Wang Cong Chen Zhao School of Software Engineering Beijing University of Posts and Telecommunications Key Laboratory of Trustworthy Distributed Computing and Service(BUPT) Ministry of Education China Electronic Data Service CO. LTD

The primary screening for pulmonary tuberculosis mainly relies on X-ray imaging all over the world. In recent years, the incidence of pulmonary tuberculosis has rebounded. This paper proposes a convolutional neural networks(CNN) based model on the tuberculosis detection of chest X-ray images, which is used for the automatic screening of pulmonary tuberculosis. Compared with the conventional CNN, this model can be used to detect the details of images and the areas of the disease quickly and accurately. There is an improvement in the learning speed and accuracy rate of our method, so it can better complete the work of anomaly detection and it can provide more effective auxiliary decision information for the practitioners.

关键词： X-ray images pulmonary tuberculosis CNN automatic screening

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The Controlled Sharing Mechanism for Private Data Based on Blockchain

The Controlled Sharing Mechanism for Private Data Based on B...

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IEEE International Conference on Data Science in Cyberspace (DSC)

作者： Li Wenqing Dong Wenjie Zhang Xu Lu Yueming School of Cyberspace Security Beijing University of Posts and Telecommunications Beijing China Beijing Aerospace Automatic Control Institute Beijing China Ministry of Education Key Laboratory of Trusted Distributed Computing and Service Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781665418164

In order to solve the problems that private information is easy to be leaked and privacy violations are difficult to be traced in the process of data cross-domain transferring, we propose a blockchain-based controlled sharing mechanism for private data, which has the merits such as decentralization, tamper-proof, and traceability. By combining smart contract technology and cryptographic algorithms, we realize the user authentication and private data rights determination. On the basis of that, we extract privacy protection metadata by using technologies such as hash function and digital signature and then store it on the blockchain, which realizes the depositing and tracing of data transferring records. At the same time, we encrypt the original data and store it in a distributed file system to alleviate the problem of limited storage space in blockchain while ensuring the security of data storage.

关键词： Hash functions Data privacy File systems Smart contracts Process control Metadata Data science

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OTFS Based Receiver Scheme with Multi-Antennas in High-Mobility V2X Systems

OTFS Based Receiver Scheme with Multi-Antennas in High-Mobil...

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IEEE International Conference on Communications Workshops, ICC

作者： Junqiang Cheng Chenglu Jia Hui Gao Wenjun Xu Zhisong Bie Key Lab of Trustworthy Distributed Computing and Service Ministry of Education Beijing University of Posts and Telecommunications Beijing China Key Lab of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing China

ISBN: (数字)9781728174402

ISBN: (纸本)9781728174419

Vehicle-to-everything (V2X) is considered as one of the most important applications of future wireless communication networks. However, the Doppler effect caused by the vehicle mobility may seriously deteriorate the performance of the vehicular communication links, especially when the channels exhibit a large number of Doppler frequency offsets (DFOs). Orthogonal time frequency space (OTFS) is a new waveform designed in the delay-Doppler domain, and can effectively convert a doubly dispersive channel into an almost non-fading channel, which makes it very attractive for V2X communications. In this paper, we design a novel OTFS based receiver with multi-antennas to deal with the high-mobility challenges in V2X systems. We show that the multiple DFOs associated with multipaths can be separated with the high-spatial resolution provided by multi-antennas, which leads to an enhanced sparsity of the OTFS channel in the delay-Doppler domain and bears a potential to reduce the complexity of the message passing (MP) detection algorithm. Based on this observation, we further propose a joint MP-maximum ration combining (MRC) iterative detection for OTFS, where the integration of MRC significantly improves the convergence performance of the iteration and gains an excellent system error performance. Finally, we provide numerical simulation results to corroborate the superiorities of the proposed scheme.

关键词： Array signal processing OFDM Receivers Antenna arrays Doppler effect Complexity theory Delays

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