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2nd International Conference on Cryptology and Information Security in Latin America, LATINCRYPT 2012

作者： Gierlichs, Benedikt Schmidt, Jörn-Marc Tunstall, Michael KU Leuven Dept. Electrical Engineering-ESAT/SCD-COSIC IBBT Kasteelpark Arenberg 10 B-3001 Leuven-Heverlee Belgium Graz University of Technology Institute for Applied Information Processing and Communications Inffeldgasse 16a A-8010 Graz Austria Department of Computer Science University of Bristol Merchant Venturers Building Woodland Road Bristol BS8 1UB United Kingdom

ISBN: (纸本)9783642334801

Implementation attacks pose a serious threat for the security of cryptographic devices and there are a multitude of countermeasures that are used to prevent them. Two countermeasures used in implementations of block ciphers to increase the complexity of such attacks are the use of dummy rounds and redundant computation with consistency checks to prevent fault attacks. In this paper we present several countermeasures based on the idea of infective computation. Our countermeasures ensure that a fault injected into a cipher, dummy, or redundant round will infect the ciphertext such that an attacker cannot derive any information on the secret key being used. This has one clear advantage: the propagation of faults prevents an attacker from being able to conduct any fault analysis on any corrupted ciphertexts. As a consequence, there is no need for any test at the end of an implementation to determine if a fault has been injected and a ciphertext can always be returned. © 2012 Springer-Verlag.

关键词： Lyapunov methods

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Quantum M-ary phase shift keying

Quantum M-ary phase shift keying

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IEEE International Symposium on Information Theory

作者： Ranjith Nair Brent J. Yen Saikat Guha Jeffrey H. Shapiro Stefano Pirandola Department of Electrical & Computer Engineering National University of Singapore Singapore Disruptive Information Processing Technologies Group Raytheon BBN Technologies Cambridge Massachusetts USA Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge Massachusetts USA Department of Computer Science University of York York United Kingdom

We develop a theory of quantum M-ary phase shift keying in which quantum states of optical modes are modulated at the transmitter by applying one of M uniformly-spaced phase shifts. We allow full freedom in choosing modulation states with any number of signal, i.e., transmitted, and ancilla modes, subject only to an average energy, i.e., photon number, constraint in either the signal modes alone or in the signal and ancilla modes together. For lossless operation and unrestricted POVM measurements at the receiver, we find the explicit form of the modulation state that minimizes the average error probability under an energy constraint of N photons. Multiple signal modes, mixed states, and entanglement with an ancilla are shown to be unnecessary for optimum performance. We show that communication with zero error is possible if and only if N ≥ (M - 1)/2.

关键词： Optical transmitters Error probability Phase shift keying Photonics Quantum mechanics

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VIQI: A new approach for visual interpretation of deep web query interfaces

VIQI: A new approach for visual interpretation of deep web q...

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International Joint Conference on INC, IMS and IDC, NCM

作者： Radhouane Boughammoura Lobna Hlaoua Mohamed Nazih Omri Department of Sciences of Data Processing Faculty of Sciences of Monastir Research Unit MARS Monastir Tunisia Department of Electronic and Computer Science High School of Sciences and Technology of H.Sousse Research Unit MARS H. Sousse Tunisia

Deep Web databases contain more than 90% of pertinent information of the Web. Despite their importance, users don't profit of this treasury. Many deep web services are offering competitive services in term of prices, quality of service, and facilities. As the number of services is growing rapidly, users have difficulty to ask many web services in the same time. In this paper, we imagine a system where users have the possibility to formulate one query using one query interface and then the system translates query to the rest of query interfaces. However, interfaces are created by designers in order to be interpreted visually by users, machines can not interpret query from a given interface. We propose a new approach which emulates capacity of interpretation of users and extracts query from deep web query interfaces. Our approach has proved good performances on two standard datasets.

关键词： Automobiles Servers Visualization Noise

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Coral reef mosaicking using Teardrop and Fast Image Labeling

Coral reef mosaicking using Teardrop and Fast Image Labeling

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OCEANS - Europe

作者： Francis James Corpuz Prospero Naval Eusebio Capili Jaylord Jauod Roel John Judilla Maricor Soriano Vision and Image Processing Group Instrumentation Physics Laboratory National Institute of Physics Computer Vision and Machine Intelligence Group Department of Computer Science College of Engineering University of Philippines Quezon Philippines Computer Vision and Machine Intelligence Group Department of Computer Science College of Engineering University of Philippines Quezon Philippines Mapua Robotics Center Special Projects Laboratory Institutional Laboratory Mgmt Office Mapua Institute of Technology Manila Philippines Vision and Image Processing Group Instrumentation Physics Laboratory National Institute of Physics University of Philippines Quezon Philippines

In this paper, we present an inexpensive system for diverless video capture and fast image stitching of image frames for rapid reef assessment of shallow coral reefs. Our system has two main components: 1) Teardrop, a boat-towable, winged hull apparatus designed to house a commercial digital camera, and 2) a mosaicking algorithm to stitch the coral reef video into mosaics for further appreciation and analysis. The captured reef video is then separated into image frames which are to be stitched sequentially using Fast Image Labeling. The overlap between image frames is estimated using Single-Step DFT, an efficient sub-pixel estimation algorithm. The estimated overlap is used to compute for the area to be added to the mosaic space. The overlapping section between succeeding image-pairs are stitched along a seam determined by a minimal-cost path using dynamic programming. The visibility of the seam boundaries is further minimized by utilizing blending on multi-resolution splines. Experimental results on automated reef mosaics creation from actual coral reef video taken using Teardrop shows the performance of the system described. The main contribution of this work is the demonstration of a rapid reef visualization system using a diverless system and commercially available, non-research-grade imaging equipment.

关键词： Image segmentation Sea measurements Cameras Labeling Discrete Fourier transforms Sea floor

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Activity recognition based on semantic spatial relation

Activity recognition based on semantic spatial relation

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International Conference on Pattern Recognition

作者： Lingxun Meng Laiyun Qing Peng Yang Jun Miao Xilin Chen Dimitris N. Metaxas University of the Chinese Academy of Sciences Beijing Beijing CN Computer Science Department Rutgers University Piscataway NJ USA Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing China

We propose an approach to recognize group activities which involve several persons based on modeling the interactions between human bodies. Benefitted from the recent progress in pose estimation [1], we model the activities as the interactions between the parts belong to the same person (intra-person) and those between the parts of different persons (inter-person). Then a unified, discriminative model which integrates both types of interactions is developed. The experiments on the UT-Interaction Dataset [2] show the promising results and demonstrate the power of the interacting models.

关键词： Joints Humans Semantics Testing Estimation Biological system modeling Image recognition

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A knowledge passing process calculus

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ICIC Express Letters 2012年第1期6卷 85-90页

作者： Qian, Zhongmin Cao, Zining Gao, Zhifeng Lin, Jinxing Department of Computer Science and Technology Nanjing University of Aeronautics and Astronautics No. 29 Yudao Street Baixia District Nanjing 210016 China Provincial Key Laboratory for Computer Information Processing Technology Soochow University No. 1 Shizi Street Suzhou 215006 China National Key Laboratory of Science and Technology on Avionics System Integration Shanghai 200233 China College of Automation Nanjing University of Posts and Telecommunications No. 9 Wenyuan Road Yadongxincheng District Nanjing 210046 China

In MAS (Multi-Agent System), communicating among agents is an important characteristic as it is important in transmitting information among agents, recognizing the status changing, and scheduling and accomplishing cooperation tasks. Different from the research in the field of computer science or others, communicating is to transmit knowledge in MAS. The existed works about transmitting knowledge were seldom. This paper proposed a knowledge passing process calculus based on Robin Milner's CCS and studied its semantic features. This work constructs a fundament for the further developing of MAS formal semantics. © 2012 ISSN 1881-803X.

关键词： Multi agent systems

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Reconstructing 3D human poses from uncalibrated monocular images with strong perspective effects

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Journal of Computational Information Systems 2012年第15期8卷 6437-6445页

作者： Chen, Shu Peng, Xiaoning School of Information Engineering Xiangtan Universtiy Xiangtan 411105 China Key Laboratory of Intelligent Computing and Information Processing Ministry of Education Xiangtan 411105 China School of Information Science and Engineering Central South University Changsha 410083 China Department of Computer Science and Technology Huaihua College Huaihua 418008 China

This paper present a geometric method to reconstruct human motion pose from 2D point correspondences obtained from uncalibrated monocular images. The proposed algorithm can handle images with very strong perspective effects, which is guaranteed by the fact that only one scale factor corresponding to the root joint in the skeleton model is required estimating. To take fully advantage of this fact, a system of two nonlinear equations with two variables to estimate the scale factor of the root joint is established, and the scale factor of the root joint is optimized by the Gauss-Newton iterative scheme. At last, a framework to reconstruct human motion pose is presented. Quantitive analysis of the experiment results based on several real monocular video sequences shows the accuracy of the scale factor as well as the accuracy of the pose reconstruction. © 2012 Binary Information Press.

关键词： Nonlinear equations

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An improved real-valued negative selection algorithm for anomaly detection

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International Journal of Advancements in Computing technology 2012年第16期4卷 453-459页

作者： Zeng, Jinquan Tang, Weiwen Liu, Caiming Hu, Jianbin Peng, Lingxi School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu China Sichuan Communication Research Planning and Designing Co. ltd Chengdu China Laboratory of Intelligent Information Processing and Application Leshan Normal University Leshan China School of Electronics and Information Nantong University Nantong China Department of Computer and Education Software Guangzhou University Guangzhou China

Conventional classification algorithms need samples for all classes (e.g. normal and abnormal) during the training phase. However, in many anomaly detection application, we can only get a class samples (commonly, normal samples) to train detectors. This paper presents an improved negative selection algorithm (NSA) and its applications to anomaly detection. This approach can only use normal samples to train detectors;at the same time, in order to overcome the drawbacks of the current representation of the self-space in NSAs, a new scheme of the representation of the self-space is introduced with variable-sized self-radius. In our experiments, this approach is tested using the wellknown real world datasets;preliminary results show that the new approach improves the overall performance of detectors and without increase in complexity.

关键词： Artificial intelligence

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A flexible modified dipole antenna printed on PET film

A flexible modified dipole antenna printed on PET film

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IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)

作者： Lei Wang Yong-Xin Guo Budiman Salam Chee Wai Albert Lu Millimeter Wave Technique Laboratory Nanjing University of Science and Technology of PLA Nanjing China Millimeter Wave Technique Laboratory Nanjing University of Science and Technology Nanjing China Department of Electrical and Computer Engineering National University of Singapore Singapore Large Area Processing Programme Singapore Institute of Manufacturing Technology Singapore Singapore Institute of Manufacturing Technology Singapore SG

A flexible transparent modify dipole antenna printed on PET film is presented in this paper. The proposed antenna was designed to operate at 2.4GHz for ISM applications. The impedance characteristic and the radiation characteristic were simulated and measured. The proposed antenna has good performance. It can be easily mounted on conformal shape, because it is fabricated on PET film having the flexible characteristic.

关键词： Dipole antennas Antenna measurements Positron emission tomography Ultra wideband antennas Films

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In search of theoretical foundations for UX research and practice

In search of theoretical foundations for UX research and pra...

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30th ACM Conference on Human Factors in Computing Systems, CHI 2012

作者： Obrist, Marianna Roto, Virpi Vermeeren, Arnold Väänänen-Vainio-Mattila, Kaisa Law, Effie Lai-Chong Kuutti, Kari Culture Lab School of Computing Science Newcastle University Newcastle upon TyneNE1 7RU United Kingdom Aalto University School of Art Design and Architecture P.O.Box 31000 Aalto00076 Finland Delft University of Technology Fac. of Ind. Design Engineering Landbergstraat 15 NL CE Delft2628 Netherlands Tampere University of Technology Unit of Human-Centered Tech P.O.Box 589 TampereFI-33101 Finland University of Leicester Department of Computer Science LeicesterLE1 7RH United Kingdom University of Oulu Department of Information Processing Science Oulu90014 Finland

In this paper we point out the relevance of and the need for a theoretical discussion around UX research and practice. Although there is a good coverage of methodological and design related topics in the HCI literature, there is still a lack of theoretical focus in the rapidly increasing work on user experience (UX). We analyzed 122 individual items on theories collected in a CHI'11 special interest group session on UX theories and theoretical frameworks. The data set was filtered and categorized in several iterations, resulting in 56 items distributed over 7 major theory categories and related to 9 relevant disciplines. The categories are an initial mapping of the field and point towards the directions for further conceptual and theoretical clarification. Our results help to explore the multi-disciplinary nature of UX and to build a more solid foundation for UX research and practice. © 2012 Authors.

关键词： Group theory

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