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2013 Research in Adaptive and Convergent Systems, RACS 2013

作者： Ko, Jeonguk Shim, Hyungjoon Kim, Dongjin Jeong, Youn-Sik Cho, Seong-Je Park, Minkyu Han, Sangchul Kim, Seong Baeg Dept. of Software Security Dankook University Yongin 448-701 Korea Republic of Dept. of Computer Science Dankook University Yongin 448-701 Korea Republic of Dept. of Computer Engineering Konkuk University Chungbuk 380-701 Korea Republic of Dept. of Computer Education Jeju National University Jeju 650-756 Korea Republic of

ISBN: (纸本)9781450323482

By measuring similarity of programs, we can determine whether someone illegally copies a program from another program or not. If the similarity is significantly high, it means that a program is a copy of the other. This paper proposes three techniques to measure similarity of the Dalvik executable codes (DEXs) in the Android application Packages (APKs). Firstly, we decompile the DEXs of candidate applications into Java sources and compute the similarity between the decompiled sources. Secondly, candidate DEXs are disassembled and the similarities between disassembled codes are measured. Finally, we extract k-gram based software birthmark form the dissembled codes and calculate the similarity of sample DEXs by comparing the extracted birthmarks. We perform several experiments to identify effects of the three techniques. With the analysis of the experimental results, the advantages and disadvantages of each technique are discussed. © 2013 ACM.

关键词： Android (operating system)

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Using unconventional awareness mechanisms to support mobile work 13

Using unconventional awareness mechanisms to support mobile ...

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2013 Chilean Conference on Human - computer Interaction, ChileCHI 2013

作者： Monares, Alvaro Ochoa, Sergio F. Pino, José A. Ruiz-Lopez, Tomás Noguera, Manuel Dept. of Computer Science University of Chile Av. Blanco Encalada 2120 Santiago Chile Dept. of Software Engineering University of Granada Periodista Daniel Saucedo Aranda s/n Granada Spain

ISBN: (纸本)9781450322003

Awareness mechanisms are normally used to deliver context information to computer systems users. These mechanisms have been extensively studied as part of collaborative solutions designed for stationary scenarios, and recently on mobile and pervasive applications. The conventional awareness mechanisms through audio or visual messages have proved to be frequently unsuitable to deliver context information to people performing mobile activities, since the user's attention is not focused on the device he/she is using. This article presents two studies exploring the use of unconventional awareness mechanisms as a way to provide context information to firefighters during urban emergencies. In particular, the effectiveness of using the haptic and smell channels is evaluated as a way to implement direct and indirect capturers of the mobile workers' attention. The obtained results hint that both channels could be used to improve the information delivery. However, the awareness mechanisms that use the haptic channel are much more effective and allow implementing a more diverse set of messages. These awareness mechanisms can be used not only during emergency responses but also in other similar mobile work scenarios. © 2013 ACM.

关键词： Semantics

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Scalable Security Analysis in Hierarchical Attack Representation Model using Centrality Measures

Scalable Security Analysis in Hierarchical Attack Representa...

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Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops

作者： Jin B. Hong Dong Seong Kim Computer Science and Software Engineering Dept. University of Canterbury

ISBN: (纸本)9781479901807

Network security can be analysed using attack representation models (ARMs) (e.g., Attack Graphs (AGs) and Attack Trees (ATs)). One can analyse the network security by computing all possible attack scenarios, but it suffers from a scalability problem. We propose centrality based network security analysis by ranking important hosts based on network centrality measures, and vulnerabilities based on security metric values. We used two-layer hierarchical attack representation model to evaluate the network security, by taking into account importance of hosts and vulnerabilities in the upper and the lower layers, respectively. We define a new centrality measure based on the location of an attacker and a target. We simulate security analysis using centrality measures comparing with an exhaustive search method. Further, we investigate the performance when the location of the attacker is different in the network.

关键词： Attack Graph Attack Tree Network Centrality Security Analysis Security Modelling Techniques Network security Scalability hosts Hierarchical Attackers

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The search for the laws of automatic random testing 13

The search for the laws of automatic random testing

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28th Annual ACM Symposium on Applied Computing, SAC 2013

作者： Furia, Carlo A. Meyer, Bertrand Oriol, Manuel Tikhomirov, Andrey Wei, Yi Department of Software Engineering ETH Zurich Zurich Switzerland ABB Corporate Research Industrial Software Systems Baden-Dättwil Switzerland Dept. of Computer Science University of York York United Kingdom Software Engineering Laboratory ITMO St.Petersburg Russia

ISBN: (纸本)9781450316569

Can one estimate the number of remaining faults in a software system? A credible estimation technique would be immensely useful to project managers as well as customers. It would also be of theoretical interest, as a general law of software engineering. We investigate possible answers in the context of automated random testing, a method that is increasingly accepted as an effective way to discover faults. Our experimental results, derived from best-fit analysis of a variety of mathematical functions, based on a large number of automated tests of library code equipped with automated oracles in the form of contracts, suggest a poly-logarithmic law. Although further confirmation remains necessary on different code bases and testing techniques, we argue that understanding the laws of testing may bring significant benefits for estimating the number of detectable faults and comparing different projects and practices. Copyright 2013 ACM.

关键词： Functions

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A fuzzy-based localization in range-free wireless sensor network using genetic algorithm&Sinc membership function

A fuzzy-based localization in range-free wireless sensor net...

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International Conference on Green Computing, Communication and Conservation of Energy (ICGCE)

作者： Ashutosh Patri Abhijit Nayak Dept. of Mining Engineering National Institute of Technology Rourkela India Dept. of Computer Science& Engineering National Institute of Technology Rourkela India

ISBN: (纸本)9781467361248

In this paper a novel localization technique is proposed using fuzzy logic and genetic algorithm to get nearly precise location of sensor nodes, in a range free localization system. This localization technique gives a stable system in which both magnitude and range of the error are very low. Various membership functions (MF) are tested among which the Sinc MF provides the best results for the system. Genetic algorithm is used to optimize the knowledge base of the fuzzy system and the simulations are done employing Mamdani fuzzy interference method. A thorough analysis compares the accuracy of the proposed system to that of the basic Centroid localization methods. Error analysis is shown using violin plot i.e. a combination of box plot and kernel density plot for the validation of the proposed model.

关键词： Wireless sensor networks Genetic algorithms Fuzzy logic Fuzzy systems Mathematical model Computational modeling Sociology

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Understanding common perceptions from online social media 25

Understanding common perceptions from online social media

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25th International Conference on software engineering and Knowledge engineering, SEKE 2013

作者： Doran, Derek Gokhale, Swapna S. Dagnino, Aldo Dept. of Computer Science and Engineering University of Connecticut StorrsCT06269 United States Industrial Software Systems ABB Corporate Research RaleighNC27606 United States

ISBN: (纸本)1891706330

Modern society habitually uses online social media services to publicly share observations, thoughts, opinions, and beliefs at any time and from any location. These geotagged social media posts may provide aggregate insights into people's perceptions on a broad range of topics across a given geographical area beyond what is currently possible through services such as Yelp and Foursquare. This paper develops probabilistic language models to investigate whether collective, topic-based perceptions within a geographical area can be extracted from the content of geotagged Twitter posts. The capability of the methodology is illustrated using tweets from three areas of different sizes. An application of the approach to support power grid restoration following a storm is presented. Copyright © 2013 by Knowledge Systems Institute Graduate School.

关键词： Data mining

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A hybrid mobility model based on social, cultural and language diversity

A hybrid mobility model based on social, cultural and langua...

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9th IEEE International Conference on Collaborative Computing: Networking, Applications and Worksharing, COLLABORATECOM 2013

作者： Karim, Lutful Mahmoud, Qusay H. School of Information and Communications Technology Seneca College of Applied Arts and Science Toronto ON Canada Dept. Electrical Computer and Software Engineering University of Ontario Institute of Technology Oshawa ON Canada

ISBN: (纸本)9781936968923

Human Mobility Models (HMMs) have become increasingly relevant in different application domains including networks designed for data dissemination protocols. Most existing HMMs consider the temporal and spatial features of human mobility. In addition, many recent HMMs based on social networks have begun to take into account social factors, which naturally influence the results of the HMMs. Unfortunately, these mobility models do not focus on the impact of several important social factors that can affect a person's actions, such as language, citizenship, and culture. This paper introduces a hybrid human mobility model that integrates social behavior, cultural and language factors into HMMs in order to measure their effect on human mobility, as well as temporal and spatial features. Results demonstrate the feasibility of the proposed model. © 2013 ICST.

关键词： Social behavior

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On detection of emerging anomalous traffic patterns using GPS data

On detection of emerging anomalous traffic patterns using GP...

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作者： Pang, Linsey Xiaolin Chawla, Sanjay Liu, Wei Zheng, Yu School of Information Technologies University of Sydney Australia Dept. of Computer Science and Software Engineering University of Melbourne Australia Microsoft Research Asia Microsoft Research Asia Australia NICTA Sydney Australia

The increasing availability of large-scale trajectory data provides us great opportunity to explore them for knowledge discovery in transportation systems using advanced data mining techniques. Nowadays, large number of taxicabs in major metropolitan cities are equipped with a GPS device. Since taxis are on the road nearly 24 h a day (with drivers changing shifts), they can now act as reliable sensors to monitor the behavior of traffic. In this article, we use GPS data from taxis to monitor the emergence of unexpected behavior in the Beijing metropolitan area, which has the potential to estimate and improve traffic conditions in advance. We adapt likelihood ratio test statistic (LRT) which have previously been mostly used in epidemiological studies to describe traffic patterns. To the best of our knowledge the use of LRT in traffic domain is not only novel but results in accurate and rapid detection of anomalous behavior. Crown Copyright © 2013 Published by Elsevier B.V. All rights reserved.

关键词： Data mining

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Scalable Attack Representation Model Using Logic Reduction Techniques

Scalable Attack Representation Model Using Logic Reduction T...

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IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Jin Bum Hong Dong Seong Kim Tadao Takaoka Computer Science and Software Engineering Dept. University of Canterbury Christchurch New Zealand

Automated construction methods of attack graphs (AGs) and their improved attack representation models (ARMs) have been proposed, but the AG has a state space explosion when analysing the security of very large sized networked systems. Instead, attack trees (ATs) and their improved ARMs can be used (e.g., Defense Trees, Protection Trees, Attack Response Trees, and Attack Countermeasure Trees), because they are a non-state-space model. However, there are no known methods to construct ATs in a scalable manner automatically while maintaining all possible attack scenarios. We can use an AG generation tools, and transform the AG into the AT using min-cuts. However, this method requires a transformation (i.e., an overhead), and computing min-cuts is a NP-hard problem. Another way is to construct ATs directly with given network information. A naive approach is to compute all possible attack paths and populate the AT branches using logic gates (e.g., AND and OR gates), but this method generates an exponential number of nodes, causing a scalability problem. We propose two logic reduction techniques to automate the ATs construction and to reduce the size of the AT. The computational complexity is calculated. The simulation result shows the construction time for the naive method and two logic reduction techniques. The trade-off between the construction time and the memory usage of simplified ATs are also shown.

关键词： Complexity theory Equations Mathematical model Security Logic gates Light rail systems Computational modeling

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Analyzing impact of video codec, encapsulation methods and streaming protocols on the quality of video streaming

Analyzing impact of video codec, encapsulation methods and s...

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International Conference on Digital Information Management (ICDIM)

作者： Afaq Iqbal Fahim Arif Nasru Minallah Dept. Computer Software Engineering National University of Science and Technology Islamabad Pakistan Dept. Computer System Engineering University of Engineering and Technology Peshawar Pakistan

There are various factors involved in the transmission of video over internet. These factors have direct impact on the quality of the transmitted video. The underlying video codec, encapsulation method and protocol are the key players which affect the quality of video transmission on a network. Up to our knowledge various research studies have been carried out to analyze the impact of these factors independently on the quality of video transmission however their combined effect on video transmission is not yet done. In this paper we characterize the impact of video codec, encapsulation methods and transmission protocols of video streaming setup, while keeping in view the percent frame loss as the main investigating parameter. The results obtained from the experiments carried out for the key investigating factor are presented in the results section of this paper. To be more precise, it was observed that the wmv1 mpeg2, m-jpeg codecs, asf encapsulation and rtp protocol performs best.

关键词： Streaming media Protocols Encapsulation Codecs Servers Media Internet

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