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network Worm Propagating Model Based on network Topology Unit

Network Worm Propagating Model Based on Network Topology Uni...

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： Wei Zhang Shize Guo Kangfeng Zheng Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Key Laboratory of Network and Information Attack & Defence Technology of MOE Beijing University of Posts and Tele

The existing analytic models on network worm propagation rarely consider the effect of topology structure, and it usually considers the probability and spread parameter as fixed values. They are not coinciding with real situation. Here in the paper, a microstructure based propagation model is proposed to inflect the variability with time. In this model, many probability factors are considered, for example the connecting probability from one node to another node, one node's immune probaility, which make the model more general and suitable for simulation.

关键词： Worm Model propagation network

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SkyF2F: Censorship Resistant via Skype Overlay network

SkyF2F: Censorship Resistant via Skype Overlay Network

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WASE International Conference on Information Engineering, ICIE

作者： Shoufeng Cao Longtao He Zhongxian Li Yixian Yang Information Security Center State Key Laboratory of Networking and Switching Technology Key Laboratory of network and information attack & defence technology of MOE Beijing University of Posts and Telecommunications China Research Center of Information Security Institute of Computing Technology Chinese Academy and Sciences Beijing China

Internet censorship is on the rise as an increasing number of countries and companies block or monitor access to parts of the Internet. Many censorship resistant systems have been proposed, which rely on deploying many access points to the censored domain. Therefore they face the problem of discovering available nodes and deploying a large number of nodes. Opposite to many access point approach, we present a system building on existing overlay network, a low-cost solution for circumventing Internet, called SkyF2F. SkyF2F is a plug-in for Skype client that allows users to establish a covert communication tunnel across Skype overlay network. We describe the design, a prototype implementation and security analysis of SkyF2F. Our security analysis shows that SkyF2F can successfully circumvent several sophisticated censoring techniques.

关键词： Information security Internet Computer security National security Laboratories Cryptography Buildings Prototypes Monitoring IP networks

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DYNAMIC DATA FLOW GRAPH-BASED SOFTWARE WATERMARKING

DYNAMIC DATA FLOW GRAPH-BASED SOFTWARE WATERMARKING

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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 CREDENTIAL ROUTING MODEL BASED ON TRUST THEORY

A NEW CREDENTIAL ROUTING MODEL BASED ON TRUST THEORY

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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： Daofeng Li Lize Gu Bin Sun Xinxin Niu Yixian Yang Information Security Center State Key Laboratory of Networking and Switching Technology Key Laboratory of network and information attack & defense technology of MOE National Engineering Laboratory for Disaster Backup and RecoveryBeijing University of Po

Router has acted as more and more important role in the large-scale network. In the meantime, the security of the router become more seriously. In this paper, we propose a new algorithm to decide a credential routing path from the start router to the end one based on the trust theory that considers the trustworthy of link, the cost of link and the trustworthy of router as the critical factors so as to utilize the principle of the grey correlation degree to obtain a credential routing path, instead of weighted mean in existed methods of trust measurement. We guarantee that packet can secure transfer under the credential routing path and identify the remote routers that are subject to attacks.

关键词： IP network Credential routing path trust theory grey correlation analysis

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A security-Enhanced Remote Platform Integrity Attestation Scheme

A Security-Enhanced Remote Platform Integrity Attestation Sc...

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International Conference on Wireless Communications, networking and Mobile Computing (WiCom)

作者： Song Cheng Liu Bing Xin Yang Yang Yixian Zhongxian Li Yin Han Key Laboratory of network and information attack & defence technology of MOE Beijing University of Posts and Telecommunications Beijing China National Engineering Laboratory for Disaster Backup and Recovery Beijing China National Cybernet Security Ltd Beijing China Huawei Technology Ltd Beijing China

Remote platform integrity attestation is a method by which a client attests its hardware and software configuration to a remote server. The goal of remote integrity platform attestation is to enable a remote challenger to determine the level of trust in the integrity of another attestator's platform configuration. However, the existing integrity reporting protocol is vulnerable to man-in-the-middle(MITM) attacks. In this paper, we describe this kind of attacks against protocols for remote platform integrity attestation, and propose a security-enhanced remote platform integrity attestation scheme for preventing man-in-the middle attacks.

关键词： Protocols Information security Laboratories Cryptography Hardware protection Privacy Telecommunication switching Computer security National security

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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...

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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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security Analysis of Two Password Authentication Schemes

Security Analysis of Two Password Authentication Schemes

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第八届国际移动商务会议(Eighth International Conference on Mobile Business)

作者： Zuowen Tan School of Information Technology Jiangxi University of Finance & EconomicsNanchang 330013JiangxiChina State Key Laboratory of Information Security Institute of Software of Chinese Academy of SciencesBeijing 100080China Key Lab of Network Security and

Recently,Rhee,Kwon and Lee proposed a practical authentication scheme only based on the common storage *** the scheme the remote user does not need to use smart *** is convenient for the users to use a common storage device such as a universal serial bus *** scheme is easy to ***, this authentication scheme is vulnerable to impersonation attacks and middle man *** attacker could impersonate legitimate users to login and access the remote *** addition,we analyze the security of Fan-Chan-Zhang's *** scheme suffers from replay attacks and impersonation attacks.

关键词： authentication replay password smart card impersonation attacks

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An improved algorithm for IP alias resolution in network topology measurement

An improved algorithm for IP alias resolution in network top...

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9th International Conference on Electronic Measurement and Instruments, ICEMI 2009

作者： Yong, Zhang Shize, Guo Kangfeng, Zheng Yixian, Yang Key Laboratory of Network and Information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing 100876 China National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing 100876 China Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9781424438624

Internet topology measurement is an important part of network measurement. Nowadays, traceroute probing method is widely used to obtain the original route data, and the IP alias resolution technique is to identify IP addresses belonging to the same router for constructing accurate Internet maps. However, there are thousands of IP addresses only in a region topology exploration, while current alias resolution technique has limited effectiveness. So we need to apply a new approach to refine the collected path traces before IP alias resolution which is called Alias Filter (AF). In this paper we propose an improved algorithm called RAF which based on rules set according to experiences for dealing with the path data. The performance analysis proves the algorithm has low cost and high efficiency. ©2009 IEEE.

关键词： network topology

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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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Measurement of micro-scale two-phase flow in a pulsating heat pipe using electrical capacitance tomography

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Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering 2009年第17期29卷 103-107页

作者： Li, Jing-Tao Xiao, Hai-Ping Dong, Xiang-Yuan Liu, Shi Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control North China Electric Power University Changping District Beijing 102206 China School of Energy and Environmental Engineering Zhongyuan Institute of Technology Zhengzhou 450007 Henan Province China

The electrical capacitance tomography (ECT) system was used to the visualization of the two-phase flow as well as the measurement of the film thickness in a pulsating heat pipe (PHP). The new-developed micro-sensor was also applied as a part of the flow channel, with the characteristics of heat transfer and hydrodynamics similar to the measured tube. The measurement accuracy and the image resolving power were improved as compared with the conventional sensors. So the applied area of the ECT technology was widened. The experimental results indicate that there might exist three flow patterns, i.e. bubble-liquid slug flow, semi-annular flow and annular flow, corresponding to different operating conditions. The measurement results of the film thickness compare well with the actual conditions, and the trend of the film thickness can realize the identification of the flow patterns.

关键词： Two phase flow

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