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Media Forensics and Security

作者： Pevný, Tomáš Fridrich, Jessica Ker, Andrew D. INPG - Gipsa-Lab. 961 rue de la Houille Blanche 38402 Grenoble France Department of Electrical and Computer Engineering Binghamton University State University of New York United States Oxford University Computing Laboratory Parks Road Oxford OX1 3QD United Kingdom

ISBN: (纸本)9780819475046

Quantitative steganalyzers are important in forensic steganalysis as they can estimate the payload, or, more precisely, the number of embedding changes in the stego image. This paper proposes a general method for constructing quantitative steganalyzers from features used in blind detectors. The method is based on support vector regression, which is used to learn the mapping between a feature vector extracted from the image and the relative embedding change rate. The performance is evaluated by constructing quantitative steganalyzers for eight steganographic methods for JPEG files, using a 275-dimensional feature set. Error distributions of within- and between-image errors are empirically estimated for Jsteg and nsF5. For Jsteg, the accuracy is compared to state-of-the-art quantitative steganalyzers. © 2009 Copyright SPIE - The International Society for Optical engineering.

关键词： Steganography

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IEEE Transactions on Haptics: Editorial

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IEEE Transactions on Haptics 2008年第1期1卷 2-8页

作者： Edward Colgate, J. Lederman, Susan Prattichizzo, Domenico Barbagli, Federico Basdogan, Cagatay Buss, Martin Ernst, Marc Frisoli, Antonio Gillespie, Brent Grant, Danny Harders, Matthias Hayward, Vincent Jones, Lynette Kajimoto, Hiroyuki Kappers, Astrid Kheddar, Abderrahmane Lin, Ming C. MacLean, Karon Miller, Brian Noma, Haruo Okamura, Allison M. O'Malley, Mareia Ryu, Jeha Tan, Hong Z. Yokokohji, Yasuyoshi Department of Psychology School of Computing Queen's University Canada IEEE Robotics and Automation Society Tübingen Germany Stanford University's Computer Science Department Tübingen Germany Institute of Automatic Control Engineering Technische Universität München Germany Independent Research Group Multisensory Perception and Action Max Planck Institute for Biological Cybernetics Tübingen Germany Department of Applied Mechanics SSSA Japan Research Division Virtual Reality and Telerobotic Systems PERCRO Laboratory Japan Department of Mechanical Engineering Japan Department of Robotics McGill University Canada Computer Vision Lab ETH Zurich Japan Virtual Reality in Medicine Group Japan IEEE CS/RAS Technical Committee on Haptics Japan Department of Electrical and Computer Engineering McGill University Canada Department of Mechanical Engineering MIT Japan University of Electro-Communications Japan Department of Physics and Astronomy Utrecht University Netherlands University of Evry France Chapel Hill United States Department of Computer Science University of British Columbia Canada ATR Knowledge Science Lab United Kingdom Department of Mechanical Engineering Denmark Johns Hopkins University United States Laboratory for Computational Sensing and Robotics United Kingdom Engineering Research Center for Computer-Integrated Surgical Systems and Technology United States Mechanical Engineering and Materials Science Department Rice University United States Korea Republic of Department of Electrical and Computer Engineering Mechanical Engineering and Psychological Sciences Purdue University United States Department of Mechanical Engineering and Science Graduate School of Engineering Kyoto University Japan

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Distributed Bayesian multiple-target tracking in crowded environments using multiple collaborative cameras

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Eurasip Journal on Advances in Signal Processing 2007年 2007卷

作者： Qu, Wei Schonfeld, Dan Mohamed, Magdi Multimedia Communications Laboratory Department of Electrical and Computer Engineering University of Illinois Chicago IL 60607-7053 United States Visual Communication and Display Technologies Lab. Physical Realization Research COE Motorola Labs. Schaumburg IL 60196 United States

Multiple-target tracking has received tremendous attention due to its wide practical applicability in video processing and analysis applications. Most existing techniques, however, suffer from the well-known "multitarget occlusion" problem and/or immense computational cost due to its use of high-dimensional joint-state representations. In this paper, we present a distributed Bayesian framework using multiple collaborative cameras for robust and efficient multiple-target tracking in crowded environments with significant and persistent *** the targets are in close proximity or present multitarget occlusions in a particular camera view, camera collaboration between different views is activated in order to handle the multitarget occlusion problem in an innovative way. Specifically,we propose to model the camera collaboration likelihood density by using epipolar geometry with sequential Monte Carlo implementation. Experimental results have been demonstrated for both synthetic and real-world video data. Copyright © 2007 Hindawi Publishing Corporation. All rights reserved.

关键词： Tracking (position)

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A secure quorum based membership mechanism for p2p systems

A secure quorum based membership mechanism for p2p systems

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12th Americas Conference on Information Systems, AMCIS 2006

作者： Liebau, Nicolas C. Heckmann, Oliver Kovacevic, Aleksandra Tafreschi, Omid Fidler, Markus Mauthe, Andreas Steinmetz, Ralf Multimedia Communications Lab Technische Universität Darmstadt Germany IT-Security Group Technische Universität Darmstadt Germany Department of Electrical and Computer Engineering University of Toronto Canada Computing Department Lancaster University United Kingdom Technische Universität Darmstadt Germany

ISBN: (纸本)9781604236262

Closed user group based on a Peer-to-Peer system require a membership mechanism that is fully decentralized. Several suggestions have been made in the literature. However, the proposed mechanisms have some significant drawbacks since any peer can easily bypass the proposed membership mechanism. In this paper we present a new fully decentralized and secure membership mechanism for Peer-to-Peer systems. A quorum of peers decides about membership requests from new peers. In order to prevent the requesting peer from manipulating the membership decision two mechanisms are applied: (1) The quorum peers must make there membership decision unanimously. This is sufficient to guarantee a correct membership decision, if a fraction of the peers in the P2P system is honest and if the quorum peers are selected in a random manner. (2) In order to ensure a random selection of the quorum peer a random value is created in a distributed way that is used to select the quorum. It can be verified, that the quorum was correctly selected. The presented mechanism is evaluated in terms of the offered security and the created traffic overhead.

关键词： Access control

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InfoShield: a security architecture for protecting information usage in memory

InfoShield: a security architecture for protecting informati...

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IEEE Symposium on High-Performance computer Architecture

作者： W. Shi J.B. Fryman G. Gu H.-H.S. Lee Y. Zhang J. Yang School of Electrical and Computer Engineering Georgia Tech College of Computing Georgia Institute of Technology Programming System Lab Corporate Technology Intel Corporation USA Department of Computer Science University of Pittsburgh USA Department of Computer Science and Engineering University of California Riverside USA

Cyber theft is a serious threat to Internet security. It is one of the major security concerns by both network service providers and Internet users. Though sensitive information can be encrypted when stored in non-volatile memory such as hard disks, for many e-commerce and network applications, sensitive information is often stored as plaintext in main memory. Documented and reported exploits facilitate an adversary stealing sensitive information from an application's memory. These exploits include illegitimate memory scan, information theft oriented buffer overflow, invalid pointer manipulation, integer overflow, password stealing Trojans and so forth. Today's computing system and its hardware cannot address these exploits effectively in a coherent way. This paper presents a unified and lightweight solution, called InfoShield that can strengthen application protection against theft of sensitive information such as passwords, encryption keys, and other private data with a minimal performance impact. Unlike prior whole memory encryption and information flow based efforts, InfoShield protects the usage of information. InfoShield ensures that sensitive data are used only as defined by application semantics, preventing misuse of information. Comparing with prior art, InfoShield handles a broader range of information theft scenarios in a unified framework with less overhead. Evaluation using popular network client-server applications shows that InfoShield is sound for practical use and incurs little performance loss because InfoShield only protects absolute, critical sensitive information. Based on the profiling results, only 0.3% of memory accesses and 0.2% of executed codes are affected by InfoShield.

关键词： Information security Protection Cryptography computer security IP networks Web and internet services Nonvolatile memory Hard disks Buffer overflow Hardware

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Random beamforming in MIMO systems exploiting efficient multiuser diversity

Random beamforming in MIMO systems exploiting efficient mult...

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2005 IEEE 61st Vehicular Technology Conference -VTC 2005 - Spring Stockholm: Paving the Path for a Wireless Future

作者： Kim, Eun Yong Chun, Joohwan Scientific Computing Lab. Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon Korea Republic of

We propose a new random beamforming technique in forward link multiuser MIMO systems that exploits efficient multiuser diversity and spatial multiplexing gain. The common channels are allocated to more than one user simultaneously and multiple antennas at the receivers are used for interference nulling, resulting in higher throughput and reduced average waiting time. We show that the throughput of the proposed scheme outperforms the upper bound of the conventional scheme. © 2005 IEEE.

关键词： Communication channels (information theory)

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An 8 GHz ultra wideband transceiver prototyping testbed

An 8 GHz ultra wideband transceiver prototyping testbed

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16th Intetrnational Workshop on Rapid System Prototyping, RSP 2005

作者： Agarwal, Deepak Anderson, Christopher R. Athanas, Peter M. Configurable Computing Lab. Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA 24061 United States Mobile and Portable Radio Research Group Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA 24061 United States

ISBN: (纸本)0769523617

Software defined radios have the potential of changing the fundamental usage model of wireless communications devices, but the capabilities of these transceivers are often limited by the speed of the underlying processors and FPGAs. This paper presents a testbed for the design of an impulse-based ultra wideband communication system. The transceiver is being developed using software/reconfigurable radio concepts and will be implemented using commercially available off-the-shelf components. The receiver uses eight 1 GHz ADCs to perform time interleaved sampling at an aggregate rate of 8 Gsamples/s. The high sampling rates present extraordinary demands on the down-conversion resources. The output of each ADC is in a different clock domain, with clocks offset in increments of 125ps. Samples are captured by the high-speed ADC and processed using a Xilinx Virtex-II Pro (XC2VP70) FPGA. The testbed has two components: a non-real time part for data capture and signal acquisition, and a real-time part for data demodulation and signal processing. The non-real time component uses the internal Block RAMs to store a set of samples and one of the PowerPC cores to process the data offline, to minimize logic resource usage. The real-time part uses distributed memory to store incoming data and processes it using hardwired multipliers and FPGA logic cells. The overall objective is to demonstrate a testbed that will allow researchers to evaluate different UWB modulation, multiple access, and coding schemes, and will support raw data rates of up to 100 MB/s. © 2005 IEEE.

关键词： Rapid prototyping

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Owl: Next generation system monitoring

Owl: Next generation system monitoring

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2005 computing Frontiers Conference

作者： Schulz, Martin Lee, Hsien-Hsin S. White, Brian S. McKee, Sally A. Jeitner, Jürgen Center for Applied Scientific Computing Lawrence Livermore National Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology Computer Systems Lab. Cornell University Department of Informatics Technische Universität München

ISBN: (纸本)1595930183

As microarchitectural and system complexity grows, comprehending system behavior becomes increasingly difficult, and often requires obtaining and sifting through voluminous event traces or coordinating results from multiple, non-localized sources. Owl is a proposed framework that overcomes limitations faced by traditional performance counters and monitoring facilities in dealing with such complexity by pervasively deploying programmable monitoring elements throughout a system. The design exploits reconfigurable or programmable logic to realize hardware monitors located at event sources, such as memory buses. These monitors run and writeback results autonomously with respect to the CPU, mitigating the system impact of interrupt-driven monitoring or the need to communicate irrelevant events to higher levels of the system. The monitors are designed to snoop any kind of system transaction, e.g., within the core, on a bus, across the wire, or within I/O devices. Copyright 2005 ACM.

关键词： Monitoring

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Resource allocation for periodic applications in a shipboard environment

Resource allocation for periodic applications in a shipboard...

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19th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2005

作者： Shestak, Vladimir Chong, Edwin K. P. Maciejewski, Anthony A. Siegel, H.J. Benmohamed, Lotfi Wang, I.-Jeng Daley, Rose Colorado State University Department of Electrical and Computer Engineering Fort Collins CO 80523-1373 Colorado State University Department of Computer Science Fort Collins CO 80523-1373 Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Road Laurel MD 20723-6099 Department of Electrical and Computer Engineering Colorado State University Department of Electrical and Computer Engineering Department of Mathematics Colorado State University IEEE Colorado State University Department of Computer Science ACM Eta Kappa Nu Electrical Engineering Honor Society Sigma Xi Science Honor Society Upsilon Pi Epsilon Computing Sciences Honor Society Johns Hopkins University Applied Physics Laboratory JHU/APL Applied Physics Lab. IR and D

ISBN: (纸本)0769523129

Providing efficient workload management is an important issue for a large-scale heterogeneous distributed computing environment where a set of periodic applications is executed. The considered distributed system is expected to operate in an environment where the input workload is likely to change unpredictably, possibly invalidating a resource allocation that was based on the initial workload estimate. The tasks consist of multiple application strings, each made up of an ordered sequence of applications. There are quality of service (QoS) constraints that must be satisfied for each string. This work addresses the problem of finding a robust initial allocation of resources to application strings that is able to absorb some level of unknown input workload increase without rescheduling. An allocation feasibility analysis is presented followed by four heuristics for finding a near-optimal allocation of resources. The performance of the proposed heuristics is evaluated and compared using simulation. The proposed heuristics also are compared to a mathematically derived upper bound. © 2005 IEEE.

关键词： Resource allocation

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A novel personal authentication system using palmprint technology

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1st International Conference on Pattern Recognition and Machine Intelligence, PReMI 2005

作者： Zhang, David Lu, Guangming Kong, Adams Wai-Kin Wong, Michael Biometric Research Centre Department of Computing Hong Kong Polytechnic University Kowloon Hong Kong Biocomputing Research Lab School of Computer Science and Engineering Harbin Institute of Technology Harbin China Electrical and Computer Engineering University of Waterloo Ontario N2L 3G1 Canada

ISBN: (纸本)3540305068

In recent times, an increasing, worldwide effort has been devoted to the development of automatic personal identification systems that can be effective in a wide variety of security contexts. Palmprints have a number of unique advantages: they are rich in features such as principal lines, wrinkles, and textures and these provide stable and distinctive information sufficient for separating an individual from a large population. In this paper, we present a novel biometric authentication system to identify a person's identity by his/her palmprint. Being a robust and reliable system, it was tested by more than 8,000 palmprint images with very low false acceptance rate (0.02%), and a relative high genuine acceptance rate (98.83%). The whole authentication process is less than 1 second. Finally, some possible applications are discussed which could be benefited by using palmprint technology. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Security of data

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