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2016 4th IEEE International Conference on Cloud computing and Intelligence Systems（IEEE CCIS2016）

作者： Tao Lv Jiang Liu Fan Lu Peng Zhang Xinyan Wang Cong Wang School of Software Engineering Beijing University of Posts and Telecommunications Key Laboratory of Trustworthy Distributed Computing and Service Beijing University of Posts and Telecommunications Ministry of Science and Technology of the People′s Republic of China Air Force General Hospital

ISBN: (纸本)9781509012572

A large number of documents related to its specific business are produced continually by enterprises and institutions in their daily work. To get useful information from these semi-structured documents we have proposed document element block model(DEBM) and applied it in the semi-structured document extraction. The model makes full use of the information contains in the document, not only the structural information, but also the content. DEBM extracts document element block from template documents and target documents, and then generate corresponding regular expression rules based on the document element block characteristic of template document, after that process each type of document elements of a set of blocks extracted document elements according to the corresponding elements block position by regular expression matching. The experiments show that extraction based on DEBM achieved good results and compared to traditional regular expressions and template matching, the approach based on DEBM performs better. The result shows that we propose a simple, efficient model to extract semi-structured documents.

关键词： Semi-structured document Document extraction Regular expression

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RBCP: A Reputation-based Blockchain Consensus Protocol for Internet of Things

RBCP: A Reputation-based Blockchain Consensus Protocol for I...

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IEEE International Conference on High Performance computing and Communications (HPCC)

作者： Jiaze Shang Tianbo Lu Yingjie Cai Shuang Luo Zhaoxin Jin School of Computer Science (National Pilot Software Enginerring School) Beijing University of Posts and Telecommunications Beijing China Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education Beijing University of Posts and Telecommunications Beijing China

The application of blockchain in the Internet of Things (IoT) solves the problem of centralization, enables data interaction of IoT nodes in untrusted environments. However, most of the blockchain consensus protocols are computationally expensive and poorly scalable, which cannot meet the current demand for low power consumption and low latency of IoT devices. Meanwhile, IoT nodes suffer from many malicious attacks. An effective reputation evaluation scheme is valuable for establishing a trusted, secure IoT environment with certain applications. In this paper, we propose RBCP, a novel reputation-based blockchain consensus protocol, and apply it to the IoT. The protocol divides IoT nodes into multiple regions, and consensus nodes in each region are selected based on real-time updated reputation values, which are used to participate in light PoW consensus and finally propose blocks. Then, we model the deposits and profits of the nodes as Stackelberg game and analyze the relationship between them. To evaluate our proposed protocol, we compare it with existing consensus protocols through several experiments. Our experimental results show that RBCP has advantages in terms of TPS, consensus time, and communication consumption, proving that it has low latency and less consensus time under the premise of sufficient security.

关键词： Time-frequency analysis Smart cities Scalability Games Real-time systems Consensus protocol Behavioral sciences

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Integrated Beamforming and Resource Allocation in RIS-Assisted mmWave Networks based on Deep Reinforcement Learning

Integrated Beamforming and Resource Allocation in RIS-Assist...

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Annual IEEE Northeast Workshop on Circuits and Systems (NEWCAS)

作者： Di Chen Hui Gao Na Chen Ruohan Cao Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China Graduate School of Science and Technology Nara Institute of Science and Technology Ikoma Japan

Reconfigurable intelligent surface (RIS) has gained wide attention recently as a promising solution to address the blockage issue in millimeter wave (mmWave) communication networks. In this paper, we consider a RIS-assisted mmWave communication system consisting of multiple RISs and users. A novel integrated scheme based on deep reinforcement learning (DRL) is proposed to jointly optimize the hybrid beamforming, phase shifts, and power allocation. Specifically, we design a multi-variable action output to achieve integrated optimization in both beam and power domains. We also design a weighted sum reward to balance the influence of beam and power domain optimizing variables in the training process. Experimental results demonstrate that the proposed DRL-based method can achieve at least 37% higher sum rates than the baseline algorithm.

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key Space of Cryptosystem Based on Chebyshev Polynomials over Finite Field

Key Space of Cryptosystem Based on Chebyshev Polynomials ove...

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International Conference on Wireless Communications, Networking and Mobile computing (WiCom)

作者： Zhihui Li Yidong Cui Yuehui Jin Huimin Xu Beijing University of Posts and Telecommunications Beijing Beijing CN Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education Beijing University of Posts and Telecommunications China School of Information and Communication Engineering Beijing University of Posts and Telecommunications China

A recently proposed public key cryptosystem based on Chebyshev polynomials suggests a new approach to data encryption. The sequence of Chebyshev polynomial is proved to be periodically, but its symmetry properties have not been investigated in depth. In this paper, a new representation of Chebyshev polynomial is introduced to study these properties, and their impacts on the cryptosystem. It is shown that the factual private key space of the cryptosystem is only half or quarter of the period of Chebyshev polynomial sequence. Proper parameters should be chosen to ensure the security of the cryptosystem.

关键词： Polynomials Chebyshev approximation Public key cryptography Encryption

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Design and implementation of network attacks detection module

Design and implementation of network attacks detection modul...

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Third International Conference on Cyberspace Technology (CCT 2015)

作者： Jiefu Gan Li Peng Hang Cheng Yueming Lu China Information Security Certification Center Beijing China School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China 3Key Laboratory of Trustworthy Distributed Computing and Service (BUPT) Ministry of Education China

Nowadays, network security not only is a technical issue, but also permeates our lives and work, and affects the socioeconomic and national security issues. This paper carried out in-depth research on the detection of network attacks, and introduced the design and implement of a network attack detection module. To imitate the real conditions, we use one computer as an attacker, one computer as a detector, and another computer as a victim. In this experiment, the detector can detect a lot of network attacks, such like ARP attacks, IP address attacks, UDP flooding attacks, TCP SYN flooding attacks, ICMP flooding attacks. Moreover, the detector alerts when it detect attacks.

关键词： Attacks Detection Detection Module Network attacks Packets Filter detector Computers IP address Flood Network

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Knowledge-Enabled Intent-Driven Network Configuration Generation for 5G Core Networks

Knowledge-Enabled Intent-Driven Network Configuration Genera...

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International Conference on Communication Technology (ICCT)

作者： Qiuying Li Jiajun Cai Ji’ang Xu Ruosi Liu Caixia Yuan Hui Gao Key Laboratory of Trustworthy Distributed Computing and Service MOE Beijing University of Posts and Telecommunications Beijing China School of Artificial Intelligence Beijing University of Posts and Telecommunications Beijing China Huawei Technoligies Bantian Industrial Base Shenzhen China

ISBN: (数字)9798350363760

ISBN: (纸本)9798350363777

Automating the configuration of 5G core networks (CNs) is crucial for meeting increasingly diverse and specialized application requirements. In this paper, we propose an intent-driven automation model for configuring 5G CNs. Our approach leverages existing 5G CN equipment manuals and extracts the underlying configuration knowledge to enable intent translation. Unlike traditional methods, the proposed model employs a knowledge fusion approach that computes the semantic correlation between user intents and equipment configuration commands. Specifically, the proposed model integrates graph neural networks and pre-trained language models, exhibiting strong reasoning capabilities. Moreover, by converting complex texts into structured knowledge graphs, the proposed model provides precise command suggestions, significantly enhancing the degree of automation in 5G CN configurations. Simulation results show that the generated commands achieve high accuracy across various scenarios, validating the effectiveness of our approach.

关键词： Adaptation models Translation Automation Accuracy 5G mobile communication Computational modeling Simulation Semantics Manuals Graph neural networks

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Enhancement for Versatile Video Coding in Vehicular Ad Hoc Network Scenarios

Enhancement for Versatile Video Coding in Vehicular Ad Hoc N...

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International Symposium on Communications and Information Technologies (ISCIT)

作者： Jiacheng Wu Jiaqi Zou Songlin Sun School of Information and Communication Engineering Beijing University of Posts and Telecommunications (BUPT) Beijing China Key Laboratory of Trustworthy Distributed Computing and Service (BUPT) Ministry of Education China National Engineering Laboratory for Mobile Network Security Beijing University of Posts and Telecommunications Beijing China

ISBN: (数字)9798350353952

ISBN: (纸本)9798350353969

Vehicular Ad hoc Network (VANET) allows infor-mation exchange between vehicles. In VANET, video is the most recommended medium for transmitting information. However, the characteristics of VANET and the requirements of video content in terms of quality have resulted in various challenges. Besides, the movements of vehicles introduce complex motions in videos, making them more difficult to compress. As a result, it is a challenging task to transmit as less bits of video streams as possible while maintaining their visual quality. Therefore, we analyze Affine Motion Estimation (AME), a new coding tool in the latest generation video coding standard H.266NV C. Subsequently, a fast algorithm is proposed to make it able to describe complex motions such as rotation, zoom, shear, etc but also with low complexity. Experimental results show that the algorithm reduces the encoding complexity of AME by 20.19% and the overall encoding complexity by 3.25% compared to anchor VTM21.0, with eligible coding performance loss under Random Access (RA) configurations.

关键词： Video coding Visualization Motion estimation Vehicular ad hoc networks Streaming media Feature extraction Encoding Complexity theory Streams Standards

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Not All Image Regions Matter: Masked Vector Quantization for Autoregressive Image Generation

arXiv

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arXiv 2023年

作者： Huang, Mengqi Mao, Zhendong Wang, Quan Zhang, Yongdong University of Science and Technology of China Hefei China MOE Key Laboratory of Trustworthy Distributed Computing and Service Beijing University of Posts and Telecommunications Beijing China Institute of Artificial intelligence Hefei Comprehensive National Science Center Hefei China

Existing autoregressive models follow the two-stage generation paradigm that first learns a codebook in the latent space for image reconstruction and then completes the image generation autoregressively based on the learned codebook. However, existing codebook learning simply models all local region information of images without distinguishing their different perceptual importance, which brings redundancy in the learned codebook that not only limits the next stage’s autoregressive model’s ability to model important structure but also results in high training cost and slow generation speed. In this study, we borrow the idea of importance perception from classical image coding theory and propose a novel two-stage framework, which consists of Masked Quantization VAE (MQ-VAE) and Stackformer, to relieve the model from modeling redundancy. Specifically, MQ-VAE incorporates an adaptive mask module for masking redundant region features before quantization and an adaptive de-mask module for recovering the original grid image feature map to faithfully reconstruct the original images after quantization. Then, Stackformer learns to predict the combination of the next code and its position in the feature map. Comprehensive experiments on various image generation validate our effectiveness and efficiency. Code will be released at https: / / github. com / CrossmodalGroup / MaskedVectorQuantization. Copyright © 2023, The Authors. All rights reserved.

关键词： Redundancy

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Generalizing knowledge graph embedding with universal orthogonal parameterization 24

Generalizing knowledge graph embedding with universal orthog...

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Proceedings of the 41st International Conference on Machine Learning

作者： Rui Li Chaozhuo Li Yanming Shen Zeyu Zhang Xu Chen Gaoling School of Artificial Intelligence Renmin University of China Beijing China Key Laboratory of Trustworthy Distributed Computing and Service (MOE) Beijing University of Posts and Telecommunications China School of Computer Science and Technology Dalian University of Technology China

Recent advances in knowledge graph embedding (KGE) rely on Euclidean/hyperbolic orthogonal relation transformations to model intrinsic logical patterns and topological structures. However, existing approaches are confined to rigid relational orthogonalization with restricted dimension and homogeneous geometry, leading to deficient modeling capability. In this work, we move beyond these approaches in terms of both dimension and geometry by introducing a powerful framework named GoldE, which features a universal orthogonal parameterization based on a generalized form of Householder reflection. Such parameterization can naturally achieve dimensional extension and geometric unification with theoretical guarantees, enabling our framework to simultaneously capture crucial logical patterns and inherent topological heterogeneity of knowledge graphs. Empirically, GoldE achieves state-of-the-art performance on three standard benchmarks. Codes are available at https://***/xxrep/GoldE.

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PMU-Leaker: Performance Monitor Unit-based Realization of Cache Side-Channel Attacks

PMU-Leaker: Performance Monitor Unit-based Realization of Ca...

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Asia and South Pacific Design Automation Conference

作者： Pengfei Qiu Qiang Gao Dongsheng Wang Yongqiang Lyu Chunlu Wang Chang Liu Rihui Sun Gang Qu Key Laboratory of Trustworthy Distributed Computing and Service (BUPT) Ministry of Education & Tsinghua University Beijing China Tsinghua University Beijing China Harbin Institute of Technology Harbin Heilongjiang China University of Maryland College Park Maryland USA

Performance Monitor Unit (PMU) is a special hardware module in processors that contains a set of counters to record various architectural and micro-architectural events. In this paper, we propose PMU-Leaker, a novel realization of all existing cache side-channel attacks where accurate execution time measurements are replaced by information leaked through PMU. The efficacy of PMU-Leaker is demonstrated by (1) leaking the secret data stored in Intel Software Guard Extensions (SGX) with the transient execution vulnerabilities including Spectre and ZombieLoad and (2) extracting the encryption key of a victim AES performed in SGX. We perform thorough experiments on a DELL Inspiron 15–7560 laptop that has an Intel® Core™ i5-7200U processor with the Kaby Lake architecture and the results show that, among the 176 PMU counters, 24 of them are vulnerable and can be used to launch the PMU-Leaker attack.

关键词： Program processors Portable computers Side-channel attacks Lakes Phasor measurement units Time measurement Hardware

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