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A New Method to Generate Attack Graphs

2009 Third IEEE International Conference on Secure Integration and Reliability Improvement SSIRI 2009(第三届IEEE安全软件集成及可信性改进国际会议)

作者： Anming Xie Guodong Chen Yonggang Wang Zhong Chen Jianbin Hu Institute of Software School of Electronics Engineering and Computer Science Peking University Be Dept. Of Electronic Engineering The First Aeronautical College of Air Force China Institute of Software School of Electronics Engineering and Computer Science Peking University Be Institute of Software School of Electronics Engineering and Computer Science Peking University Be Institute of Software School of Electronics Engineering and Computer Science Peking University Be

ISBN: (纸本)9780769537580

To address the scalability problem in attack graphs generation, we propose a novel method to generate attack graphs automatically. Our approach constructs a two-tier attack graph framework, which includes a host access graph and some sub-attack graphs. A subattack graph describes concrete attack scenarios from one source host to one target host, while the host access graph describes the attacker's privilege transition among hosts. Our sub-attack graphs and host access graph have remarkable smaller scales and can help network administrators to find the key hosts in attack sequences. Analysis shows that the upper bound computational cost of our model is O(N3), which could also be competed in real time. The following experiment validates our approach.

关键词： network security attack graphs host access graph sub-attack graph

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Environmental surface boundary tracking and description using a UAV with vision

Environmental surface boundary tracking and description usin...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Pablo Lanillos José J. Ruz Gonzalo Pajares Jesus M. de la Cruz Dept. of Computer Architecture and Automatic Control Complutense University Madrid Spain Dept. of Software Engineering and Artificial Intelligence Complutense University Madrid Spain

This work presents a strategy to track and describe the boundary of an environmental surface using a sequence of incomplete boundary images coming from an UAV with a camera onboard. The algorithm uses all captured images to feed the trajectory, which drives the UAV towards the next point to take the next shot, until the identification is completed. The multiple patterns of the input image make the problem difficult. Our approach orders the points of the image to identify the existent edges, and computes the trajectory as a minimization problem using a multi-objective function that gathers information about the boundary and the polynomial that fit in these edges.

关键词： Unmanned aerial vehicles Cameras Data mining Shape Monitoring Spline Image sensors Fires Surveillance computer architecture

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Image retrieval with automatic query expansion based on local analysis in a semantical concept feature space 09

Image retrieval with automatic query expansion based on loca...

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ACM International Conference on Image and Video Retrieval, CIVR 2009

作者： Rahman, Md. Mahmudur Bhattacharya, Prabir Dept. of Computer Science and Software Engineering Concordia University Montreal QC H3G 2W1 Canada Concordia Institute for Information Systems Engineering Concordia University Montreal QC H3G 2W1 Canada

ISBN: (纸本)9781605584805

We present an automatic query expansion approach by generalizing the vector space model of information retrieval. In this framework, the images are presented by vectors of weighted concepts similar to the keyword-based representation in the text retrieval domain. The concepts comprise of color and texture patches from local image regions in a multi-dimensional feature space. To generate the concept vocabularies and represent the images, statistical model is built by utilizing a multi-class Support Vector Machine (SVM)-based classification technique. For automatic query expansion, the correlations between concepts are analyzed based on the neighborhood proximity between the concepts in encoded images by considering the local feedback information. The experimental results on a photographic image collection demonstrate the effectiveness of the proposed query expansion approaches. Copyright 2009 ACM.

关键词： Support vector machines

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Hybrid modeling of opto-electrical interfaces using DEVS and modelica

Hybrid modeling of opto-electrical interfaces using DEVS and...

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DEVS Integrative M and S Symposium, DEVS 2009, Part of the 2009 Spring Simulation Multiconference, SpringSim 2009

作者： Sanz, Victorino Jafer, Shafagh Wainer, Gabriel Nicolescu, Gabriela Urquia, Alfonso Dormido, Sebastian Dpto. Infomática y Automática ETSI Informatica UNED Madrid Spain Dept. Computer Science and Engineering Carleton University Ottawa ON Canada Dépt. Geńie Informatique Ećole Polytechnique de Montreál Montreál QC Canada

We discuss two implementations of opto-electrical interfaces, their characteristics and functionalities using a hybrid M&S approach. These interfaces consist in a transmitter and a receiver, composed by electrical and optical parts, that translate electrical signals into optical impulses and viceversa. The first implementation, performed using the CD++ modeling environment, represents a discrete-event model of the system following the DEVS formalism. The other implementation uses the Modelica Standard Library to compose the electrical parts as a continuous-time model, and the Modelica DEVSLib library to describe the optical part as a discrete-event system. The obtained simulation results are equivalent in both implementations. They reproduce translation of a continuous-time sinusoid electrical signal into discrete optical impulses in the transmitter, and the opposite process in the receiver. These approaches simplify the development of multidomain hybrid systems and the study of ONoC at a high abstraction level.

关键词： Transmitters

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Automatic Extraction of Planetary Image Features

Automatic Extraction of Planetary Image Features

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IEEE International Conference on Space Mission Challenges for Information Technology, SMC-IT

作者： G. Troglio J. A. Benediktsson G. Moser S. B. Serpico J. Le Moigne Dept. of Electrical and Computer Engineering University of Iceland Reykjavik Iceland Dept. of Biophysics and Electronic Engineering University of Genoa Genoa Italy Software Engineering Division Goddard Space Flight Center Greenbelt MD USA

With the launch of several Lunar missions such as the Lunar Reconnaissance Orbiter (LRO) and Chandrayaan-1, a large amount of Lunar images will be acquired and will need to be analyzed. Although many automatic feature extraction methods have been proposed and utilized for Earth remote sensing images, these methods are not always applicable to Lunar data that often present low contrast and uneven illumination characteristics. In this paper, we propose a new method for the extraction of features from the Lunar surface, based on the combination of several image processing techniques, including a watershed segmentation and the generalized Hough Transform. The method has many applications, among which image registration, and can be generalized to other planetary images as well.

关键词： Moon Feature extraction Reconnaissance Image analysis Earth Remote sensing Lighting Data mining Image processing Image segmentation

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CED: A community-based event delivery protocol in publish/subscribe systems for Delay Tolerant Sensor Network (DTSN)

CED: A community-based event delivery protocol in publish/su...

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38th International Conference on Parallel Processing, ICPP-2009

作者： Zhu, Jinqi Liu, Ming Cao, Jiannong Chen, Guihai Gong, Haigang Xu, Fulong Dept. of Computer Science and Engineering University of Electronic Science and Technology of China Cheng du China Internet and Mobile Computing Lab. Department of Computing Hong Kong Polytechnic University Hong Kong State Key Laboratory for Novel Software Technology Nanjing University China

ISBN: (纸本)9780769538020

The basic operation of Delay Tolerant Sensor Network (DTSN) is to finish pervasive data gathering in networks with intermittent connectivity, while the publish/subscribe (Pub/Sub for short) paradigm is used to deliver events from a source to interested clients in an asynchronous way. Recently, to extend a Pub/Sub system in DTSN has become a promising topic. However, due to the unique characteristic of frequent partitioning in DTSN, to extend a Pub/Sub system in DTSN is a considerably difficult and challenging problem, and there is no good solution to it in existing works. To adapt Pub/Sub systems to DTSN, we propose CED, a community-based event delivery protocol. In our design, event delivery is based on several unchanged communities, which are formed by sensor nodes in the network according to their connectivity. CED consists of two components: Event delivery and queue management. In event delivery, events in a community are delivered to mobile subscribers once a subscriber comes into the community, for improving the data delivery ratio. The queue management employs both the event successful delivery time and the event survival time to decide whether an event should be delivered or dropped for minimizing the transmission overhead. The effectiveness of CED is demonstrated through comprehensive simulation studies. © 2009 IEEE.

关键词： Sensor nodes

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Enhancing cooperative behavior for online reputation systems by group selection

Enhancing cooperative behavior for online reputation systems...

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Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing in Conjunction with the UIC'09 and ATC'09 Conferences, UIC-ATC 2009

作者： Ren, Yizhi Li, Mingchu Cui, Yongrui Guo, Cheng Sakurai, Kouichi School of Software Dalian University of Technology Dalian 116621 China Dept. of Computer Science and Communication Engineering Kyushu University Hakozaki Fukuoka 812-81 Japan Institute of Systems Information Technologies KYUSHU 2-1-22 Momochihama Sawara-ku Fukuoka 814-0001 Japan

ISBN: (纸本)9780769537375

Reputation systems are very useful in large online communities in which users may frequently have the opportunity to interact with users with whom they have no prior experience. Recently, how to enhance the cooperative behaviors in the reputation system that has became to one of the key open issues. Research in the evolutionary game theory shows that the group selection or multilevel selection can favor the cooperation in the finite populations. Furthermore, Nowak et al., in [1], [2] give a fundamental condition for the evolution of cooperation by group *** on the above important result, we extend the group selection concept in evolutionary biology and propose a group-based mechanism to enhance cooperation for online reputation systems. © 2009 IEEE.

关键词： Game theory

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Multispectral image fusion using Walidlet transform

Advances in Modelling and Analysis B

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Advances in Modelling and Analysis B 2009年第1-2期52卷 1-20页

作者： Al-Heladi, A.H.M. Mahmmoud, W.A. Hali, H.A. Fadhel, A.F. Software Engineering and Computer Information Systems Dept. Al-Isra Private University P.O.B. 22 Amman 11622 Jordan University of Baghdad College of Engineering Baghdad Iraq

In various mapping and remote sensing applications, fusion technique might be adopted in order to obtain a better understanding of a scene, high spatial/high spectral resolutions images by combining multispectral and panchromatic images is very important issue. Recently, various wavelet-based image fusion techniques were developed to provide high quality of the spectral content in fused image. But, these wavelet-based methods have a drawback in spatial resolution of the fused result In this paper, a new method of image fusion is introduced. The proposed method is based on a Hybrid transform called Walidlet transform (WLT), which is an extensions of Ridge let transform. It uses multiwavelet transform instead of wavelet transform in the final steps of Ridgelet transform. Since edges and noise play a fundamental role in image understanding, hence this Walidlet transform is a good way to enhance the edges and reduce the noise. The proposed method of fusion provides richer information in spatial and spectral domains simultaneously as well as it has reached an optimum fusion result.

关键词： Remote sensing

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Duplex narrowcasting operations for multipresent groupware avatars on mobile devices

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International Journal of Wireless and Mobile Computing 2009年第4期3卷 280-287页

作者： Cohen, Michael Fernando, Owen Noel Newton Duminduwardena, Uresh Chanaka Kawaguchi, Makoto Spatial Media Group University of Aizu Aizu-Wakamatsu Fukushima 965-8580 Japan Dept. of Computer and Information Systems Graduate School of Computer Science and Engineering University of Aizu Japan Software Engineering Services Dialog Telekom PLC Colombo Sri Lanka Japan Research Institute Tokyo Japan

The apparent paradoxes of multipresence, having avatars in multiple places simultaneously, are resolvable by an 'autofocus' feature, which uses reciprocity to project overlaid soundscapes and simulate the precedence effect to consolidate the display. We have developed an interface for narrowcasting functions for networked mobile devices deployed in a Collaborative Virtual Environment. Featuring multiple icons in a '2.5D' application, the interface can be used to control motion, sensitivity, and audibility of avatars in a teleconference. The interface is integrated with other clients through a 'servent' (server/client hybrid) HTTP-TCP/IP bridge, interoperating with a heterogeneous groupware suite including stereographic panoramic browsers and spatial audio backends and speaker arrays. Copyright © 2009 Inderscience Enterprises Ltd.

关键词： Groupware

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Towards sustainable infrastructure management: Knowledge-based service-oriented computing framework for visual analytics

Towards sustainable infrastructure management: Knowledge-bas...

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SPIE Defense, Security, and Sensing

作者： Vatcha, Rashna Lee, Seok-Won Murty, Ajeet Tolone, William Wang, Xiaoyu Dou, Wenwen Chang, Remco Ribarsky, William Liu, Wanqiu Chen, Shen-En Hauser, Edd Dept. of Software and Information Systems University of North Carolina at Charlotte 9201 University City Blvd Charlotte NC 28223-0001 United States Dept. of Computer Science University of North Carolina at Charlotte 9201 University City Blvd Charlotte NC 28223-0001 United States Charlotte Visualization Center University of North Carolina at Charlotte 9201 University City Blvd Charlotte NC 28223-0001 United States Dept. of Civil Engineering University of North Carolina at Charlotte 9201 University City Blvd Charlotte NC 28223-0001 United States

ISBN: (纸本)9780819476128

Infrastructure management (and its associated processes) is complex to understand, perform and thus, hard to make efficient and effective informed decisions. The management involves a multi-faceted operation that requires the most robust data fusion, visualization and decision making. In order to protect and build sustainable critical assets, we present our on-going multi-disciplinary large-scale project that establishes the Integrated Remote Sensing and Visualization (IRSV) system with a focus on supporting bridge structure inspection and management. This project involves specific expertise from civil engineers, computer scientists, geographers, and real-world practitioners from industry, local and federal government agencies. IRSV is being designed to accommodate the essential needs from the following aspects: 1) Better understanding and enforcement of complex inspection process that can bridge the gap between evidence gathering and decision making through the implementation of ontological knowledge engineering system;2) Aggregation, representation and fusion of complex multi-layered heterogeneous data (i.e. infrared imaging, aerial photos and ground-mounted LIDAR etc.) with domain application knowledge to support machine understandable recommendation system;3) Robust visualization techniques with large-scale analytical and interactive visualizations that support users' decision making;and 4) Integration of these needs through the flexible Service-oriented Architecture (SOA) framework to compose and provide services on-demand. IRSV is expected to serve as a management and data visualization tool for construction deliverable assurance and infrastructure monitoring both periodically (annually, monthly, even daily if needed) as well as after extreme events. © 2009 SPIE.

关键词： Decision making

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