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检索条件"机构=Key Laboratory of Network Computing and Security Technology"

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DYNAMIC DATA FLOW GRAPH-BASED SOFTWARE WATERMARKING

DYNAMIC DATA FLOW GRAPH-BASED SOFTWARE WATERMARKING

引用

2009 IEEE International Conference on network Infrastructure and Digital Content(2009年IEEE网络基础设施与数字内容国际会议 IEEE IC-NIDC2009)

作者： Xinxin Niu Zhengming Hu Bo Feng Miao Zhang Guoai Xu Information Security Center State Key Laboratory of Networking and Switching Technology Beijing Un Key Laboratory of network and information attack & defense technology of MOE Beijing University of National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Te

ISBN: (纸本)9781424448999

In this paper we indicate the concept of Dynamic Data Flow Graph based on the dynamic data dependency during execution of software. On this basis, we propose a dynamic software watermarking algorithm, which embeds watermarking information into DDFG of software, and discuss the implementation of embedding and extracting watermark. Finally we analyze the performance of this algorithm.

关键词： Software Watermarking Dynamic Watermarking Dynamic Data Flow Graph

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A New Data Streaming Method for Locating Hosts with Large Connection Degree

A New Data Streaming Method for Locating Hosts with Large Co...

引用

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

作者： Xiaohong Guan Pinghui Wang Tao Qin MOE Key Laboratory of Intelligent Networks and Network Security State Key Laboratory of Manufacturing Systems Xi'an Jiaotong University Xi'an China Department of Automation Tsinghua National Laboratory of Information Science and Technology Tsinghua University Beijing China

Locating hosts with large connection degree is very important for monitoring anomalous network traffics. The in-degree (out-degree), defined as the number of distinct sources (destinations) that a network host is connected with (connects) during a given time interval. Due to massive amount of data in high speed network traffics and limit on processing capability, it is difficult to accurately locate hosts with large connection degree over high speed links on line. In this paper we present a new data streaming method for locating hosts with large connection degree based on the reversible connection degree sketch to monitor anomalous network traffics. The required memory space is small and constant, and more importantly the update/query complexity would not depend on the amount of data. The hash functions for data sketch are designed based on the remainder characteristics of the number theory so that in-degree/out-degree associated with a given host can be accurately estimated. Although the connection degree sketch does not preserve any host address information, we can analytically reconstruct the host addresses associated with large in-degree/out-degree by a simply equation purely based on the characteristics of the hash functions without using any host address information. This procedure is highly efficient since the computational time is constant and ignorable. Furthermore, this reversible connection degree sketch based method can be easily implemented in distributed systems. The experimental and testing results based on the actual network traffics show that the new method is truly accurate and efficient.

关键词： Telecommunication traffic Computer crime Intrusion detection Statistical distributions Velocity measurement Sampling methods Condition monitoring Failure analysis Scalability Statistics

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A Model of Message-Based Debugging Facilities for Web or Grid Services

A Model of Message-Based Debugging Facilities for Web or Gri...

引用

IEEE World Congress on Services (SERVICES)

作者： Qiang Yue Xiaoyi Lu Zhiguang Shan Zhiwei Xu Haiyan Yu Li Zha Key Laboratory of Network Science and Technology Institute of Computing Technology Chinese Academy and Sciences Beijing China Department of Information Technology State Information Center Peoples Republic of China Beijing China

Message-based debugging facilities for Web or Grid Services are separated from an infrastructure of source level debugging and can work in a self-identifying and coexisting mode within a normal services container. In this paper, we discuss problems for services debugging and approaches we take. We present the operational model and context inspection of message-based debugging facilities. The facilities are able to trace service behaviors, dump debugging information, and manage states and behavioral breakpoints of debugged services. This model supports a mechanism of multi-user and multi-site service debugging without requiring programmers or developers to one by one duplicate full scenarios in multiple servers.

关键词： Containers Context-aware services Distributed computing Information management Web services Software debugging Runtime Laboratories Computers Context modeling

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Differentiated Bandwidth Allocation for Reducing Server Load in P2P VOD

Differentiated Bandwidth Allocation for Reducing Server Load...

引用

International Conference on Grid and Cooperative computing (GCC)

作者： Zhengjun Chena Kaiping Xue Peilin Hong Hancheng Lu University of Science and Technology of China Hefei Anhui CN MOE-MS Key Laboratory of Multimedia Computing and Communication and The Information Network Laboratory of EEIS Department University of Science and Technology Hefei China The Information Network Lab of EEIS Department University of Science and Technology of China (USTC) Hefei China The Information Network Laboratory of EEIS Department University of Science and Technology Hefei China

P2P technology offers a promising scalable solution for video-on-demand (VOD) service. Recent studies have found that departure misses are the major cause of server load in P2P-based VOD. Inspired by this finding, this paper addresses the design of bandwidth allocation policy to decrease departure misses and thereby reduce server load further. We first formulate the minimum departure misses problem. Then we propose a centralized algorithm which serves as our benchmark for all other schemes. The centralized algorithm makes use of surplus bandwidth to help peers prefetch chunks, thus reducing departure misses significantly. We then propose a distributed bandwidth allocation algorithm in which a stable peer with higher playback position is able to obtain a larger share of parentspsila upload bandwidth. A simple predictor is developed for stable node identification. Simulation results show that our distributed protocol outperforms traditional approach, and close to the centralized one.

关键词： Channel allocation Bandwidth Streaming media Peer to peer computing network servers Web server Computer networks Grid computing Multimedia computing Prefetching

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security Analysis of Two Remote User Authentication Schemes Using Bilinear Pairings

Security Analysis of Two Remote User Authentication Schemes ...

引用

International Conference on Management of e-Commerce and e-Government, ICMECG

作者： Zuowen Tan Key Laboratory of Network Security and Cryptology School of Mathematics and Computer Science Fujian Normal University Fuzhou China School of Information Technology Jiangxi University of Finance and Economics Nanchang Jiangxi China State Key Laboratory of Information Security Institute of Software of Chinese Academy of Sciences Beijing China

Recently, Das et al. and Tseng et al. proposed a remote user authentication scheme using bilinear pairings, respectively. They can provide a flexible password change option to the users without any help from the remote server. However, some weaknesses of the two bilinear pairing based remote password authentication schemes are found in the paper. The schemes suffer from offline password guessing attack and impersonation attacks.

关键词： Authentication Identity-based encryption network servers Information security Elliptic curve cryptography Public key Elliptic curves Computer security Galois fields Computer network management

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On security Notions for Verifiably Encrypted Signature

On Security Notions for Verifiably Encrypted Signature

引用

The Fifth International Conference on Information Assurance and security(第五届信息保障与安全国际会议)

作者： Xiaoyuan Yang Xu an Wang Qingquan Peng Key Laboratory of Information and Network Security Engneering College of Chinese Armed Police Force University of Electronic Science and Technology of Xi'an Xidian University P.R.China

ISBN: (纸本)9780769537443

First we revisit three (BGLS, MBGLS and GZZ) verifiably encrypted signature schemes [2], [6], [9]. We find that they are all not strong unforgeable. We remark that the notion of existential unforgeable is not sufficient for fair exchange protocols in most circumstances. So we propose three new (NBGLS, MBGLS and NGZZ) verifiably encrypted signature schemes which are strong unforgeable. Also we reconsider other two (ZSS and CA) verifiably encrypted signature schemes [8], [11], we find that they both cannot resist replacing public key attack. So we strongly suggest that strong unforgeable for verifiably encrypted signature be a better notion than existential unforgeable and checking adjudicator knowing its private key is a necessary step for secure verifiably encrypted signature scheme.

关键词： Public key Information security Identity-based encryption Resists Amplitude shift keying Laboratories Educational institutions Public key cryptography Cryptographic protocols Forgery

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A large family of prime-phase sequences with low correlation

A large family of prime-phase sequences with low correlation

引用

International Workshop on Signal Design and Its Applications in Communications (IWSDA)

作者： Ni-Gang Sun Chang-Lu Lin Key Laboratory of Network Security and Cryptology Fujian Normal University Fuzhou Fujian China Department of Computer Science and Engineering East China University of Science and Technology Shanghai China

A large family of p-phase highest coordinate sequences, where p is an odd prime, is constructed by using the highest coordinate of the generalized Kerdock codes over the ring Z pl , for l ges 3. Utilizing the local Weil bound and spectral analysis over the additive group of Z pl , we derive an estimate of the correlation of the sequences. And the result shows that these sequences have low nontrivial autocorrelation and crosscorrelation, which makes it possible as code sequences in CDMA communication systems.

关键词： Multiaccess communication Autocorrelation Sun Computer science Computer security Cryptography Electronic mail Spectral analysis Interference Binary sequences

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Watermarking 2D Vector Maps on Spatial Topology Domain

Watermarking 2D Vector Maps on Spatial Topology Domain

引用

International Conference on Multimedia Information networking and security (MINES)

作者： Chuanjian Wang Zhiyong Peng Yuwei Peng Liang Yu Computer School Wuhan University of China China College of Information Science &Technology Shihezi University China Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of Education China

Vector maps are valuable asset of data producers. How to protect copyright of vector maps effectively using digital watermarking is a hot research issue. In this paper, geometry invariance property of spatial topological relation is exploited to design a robust, blind algorithm watermarking 2D vector maps. Watermarks are embedded in spatial topological relation by modifying slightly the metric measure of spatial topological relation. Experiments results show that our proposed algorithm has a good robustness against rotation, scaling and translation attack.

关键词： Watermarking Topology Robustness Protection Multimedia databases Information security Computer networks Spline Detectors Multimedia computing

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An Algorithmic Aspect of Zernike Moments in the Presence of Rotation

An Algorithmic Aspect of Zernike Moments in the Presence of ...

引用

The First International Conference on Multimedia Information networking and security(第一届国际多媒体网络信息安全会议 MINES 2009)

作者： Shijun Xiang Department of Electronic Engineering School of Information Science and Technology Jinan University Guangzhou 510632 China Key Laboratory of Network Security and Cryptology Fujian Normal University Fuzhou 350007 China

Zernike moments are widely used in image processing fields (e.g., rotation-invariant watermarking) based on many desirable properties, such as rotational invariance, noise robust and efficient representation of pattern. In image processing operations, an image after rotation will result in a bigger size for keeping the content. This will cause the difference among Zernike moments of an image and its rotated versions. In this paper, we investigate such a problem in detail and introduce a solution by normalizing original and its rotated versions into the same size. Furthermore, we propose an algorithmic scheme of Zernike moments' computation. Both theoretical analysis and experimental testing show that the proposed approach can efficiently avoid the effect of the image size change under rotation.

关键词： Image watermarking Rotation Zernike moments

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Research on Man-in-the-Middle Denial of Service Attack in SIP VoIP

Research on Man-in-the-Middle Denial of Service Attack in SI...

引用

International Conference on networks security, Wireless Communications and Trusted computing, NSWCTC

作者： Zhe Chen Shize Guo Kangfeng Zheng Haitao Li Key Laboratory of network and information attack & defence technology of MOE National Engineering Laboratory of Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing China Information Security Center State Key Laboratory of Networking and Switching Technology National Engineering Laboratory of Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781424442232

As the number of VoIP users increase and as the deployment of SIP devices gains ground, security has risen as a potential issue worthy of our consideration. VoIP is an application running on the data network and as such, inherits the security issues common to IP. The man-in-the-middle (MitM) attacks and the denial of service (DoS) attacks are the hackneyed and evil cyber attacks in the IP which can be easily implemented in the SIP VoIP. In this paper, a unified communication model of SIP VoIP infrastructure is established to analyze the DoS attacks launched by the MitM (MitM-DoS). Then we use the set theory to research the models of MitM-DoS attacks formally.

关键词： Computer crime IP networks Information security Laboratories Internet telephony Protocols National security Communication switching Data security Web and internet services

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