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3rd International symposium on information processing, ISIP 2010

作者： Chen, Yanshen Han, Dezhi School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China College of Information Engineering Shanghai Maritime University of Science and Technology Shanghai China

ISBN: (纸本)9780769542614

For the security issue in intranet storage systems, we design a data security storage system, which integrates information isolation, accessing control, virus detection, metadata safeguard of crucial data and fast-speed retrieval. This system can provide a solid foundation for data protection and multilevel storage in enterprise intranet. The result on trial displays that this system can ensure the data security of storage system for intranet, with few side effects on the I/O performance of the network. © 2010 IEEE.

关键词： Intranets

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Digital Watermarking Algorithm Based on Space-Time Coding

Digital Watermarking Algorithm Based on Space-Time Coding

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2010 symposium on security detection and information processing

作者： Zhang, Fan Zhang, Xinhong Li, Rui Henan Univ Coll Comp & Informat Engn Kaifeng 475001 Peoples R China Henan Univ Inst Image Proc & Pattern Kaifeng 475001 Peoples R China

Theories of spread spectrum communications, channel coding, capacity analysis techniques have been widely applied in digital watermarking research. In recent years, communication theory has made an important technological breakthrough. The next generation mobile communication systems (4G) is far exceeding the capacity needs of the traditional Shannon channel capacity limit, and this need promotes the rapid development of multiple-input multiple-output (MIMO) technology. The combination of space-time coding and MIMO technology will breakthrough the capacity limit of single-input single-output (SISO) channel. In this paper, the digital image watermarking system is extended from SISO to MIMO systems based on space-time coding and MIMO communication theory. The new watermarking algorithm is designed in the new framework of space-time coding and MIMO-based communication theory. The watermark capacity and the detection error rate also are further studied under the conditions of different space-time coding. These studies will provide a new idea for the design of new digital watermarking algorithm. (c) 2010 Published by Elsevier Ltd.

关键词： digital image processing digital watermarking MIMO space-time coding

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Methods of Personnel Screening for Concealed Contraband detection by Millimeter-wave Radiometric Imaging

Methods of Personnel Screening for Concealed Contraband Dete...

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2010 symposium on security detection and information processing

作者： Hu, Taiyang Xiao, Zelong Xu, Jianzhong Wu, Li Nanjing Univ Sci & Technol Sch Elect Engn & Optoelect Technol Nanjing 210094 Peoples R China

The currently emerging terrorism and violence crimes in the scope of worldwide have posed increasingly extensive threats to the personnel and public security. Therefore, it is crucial to carry out personnel screening in the areas of airports, subways, customs and critical infrastructure, in order to detect contraband concealed underneath a person's clothing, such as guns, plastic explosives and drugs. With the advances in millimeter-wave (MMW) technology, MMW radiometric imaging has attracted an increasing interest in the application of security screening. Both the high transparency of clothing at millimeter wavelengths and the spatial resolution required to generate adequate images combine to make MMW radiometric imaging a natural approach of personnel screening for concealed contraband detection. On the basis of the principle of MMW radiometric imaging for applications of concealed contraband detection, a brief overview of some representative applied systems from abroad is given in this paper, according to the categories of different imaging mechanisms. Then, a series of researches on MMW radiometric imaging for personnel screening carried out at MMW Applied Laboratory of Nanjing University of Science and Technology are described in detail from different aspects. These researches mainly focus on the improved radiometer uncertainty equation of planar scanning imaging system, the motion-blur parameters identification of MMW radiometric images and the radiometric image fusion involving concealed contraband detection. Moreover, when the MMW radiometric imaging is carried out indoors, the benefit of the sky illumination no longer exists and the radiometric temperature contrast between the targets and the background decreases sharply, which results in the degradation of MMW radiometric images. Hence, the method of noise illumination is adopted in the application of indoor radiometric imaging. Ultimately, the development trends of MMW radiometric imaging with respect to

关键词： Millimeter-wave Radiometric imaging Concealed contraband detection Personnel screening

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Network Forensics: Notions and Challenges

Network Forensics: Notions and Challenges

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9th IEEE International symposium on Signal processing and information Technology

作者： Almulhem, Ahmad King Fahd Univ Petr & Minerals Dept Comp Engn Dhahran 31261 Saudi Arabia

ISBN: (纸本)9781424459490

Network forensics is an extension of the network security model which traditionally emphasizes prevention and detection of network attacks. It addresses the need for dedicated investigative capabilities in the current model to allow investigating malicious behavior in networks. It helps organizations in investigating outside and inside network attacks. It is also important for law enforcement investigations. In this paper, various aspects of network forensics are reviewed as well as related technologies and their limitations. Also, challenges in deploying a network forensics infrastructure are highlighted.

关键词： Network Forensics Network security Computer Forensics Computer security

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Feasibility study on application of CT using γ-ray with double energy to container security inspection

Feasibility study on application of CT using γ-ray with dou...

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2010 symposium on security detection and information processing

作者： Zhang, Weijun Li, Xueqin Xu, Zhengguang Chinese Ctr Dis Control & Prevent Natl Inst Radiol Protect Beijing 100088 Peoples R China Minist Publ Secur Res Inst 1 Beijing 102200 Peoples R China

The study object in this research is the attenuation coefficient of linear (ACOL) from an interaction, which is get form the incident gamma ray, radiated by a 600 keV (gamma ray energy level is Near Cs-137) source and A 1250 keV (gamma ray energy is equal to Co-60) source which are promoted by American NIST, interates with No. 1-No. 92 element. After further research on two groups ACOL of interaction of rays and different meterials, we built a ratio of the ACOL of dual energy gamma ray system(it is defined as Mz value). Then, we studied the relations of the ratio and material atom number. We get a quite good linear correlation value of a ACOL Mz of elements No. 1 to No. 92 and atom number. And, ten kinds of pure materials were choosed to test the ACOL Mz value, and we find the value can be located in the elemental distribution curve area. This rule promoted a important theory basis for the realization of dual energy CT technology which is widely used in container safety inspection. (c) 2010 Published by Elsevier Ltd.

关键词： Dual-Energy gamma-Ray Attenuation coefficient of linear CT technology Safety inspection for Container The feasibility study

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Voice phishing detection technique based on minimum classification error method incorporating codec parameters

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IET SIGNAL processing 2010年第5期4卷 502-509页

作者： Chang, J. -H. Lee, K. -H. Inha Univ Sch Elect Engn Inchon 402751 South Korea

The authors propose an effective voice phishing detection algorithm based on a Gaussian mixture model (GMM) employing the minimum classification error (MCE) technique. The detection of voice phishing is performed based on the GMM using decoding parameters of the 3GPP2 selectable mode vocoder (SMV) codec directly extracted from the decoding process of the transmitted speech information in the mobile phone. The authors' approach is further improved by the MCE scheme in that different weights are assigned to each likelihood ratio and is considered to be new. The experimental results show that the proposed method is effective in discriminating between true statements and lies.

关键词： decoding process Data security telecommunication security mobile phone Mobile radio systems codec parameter Other topics in statistics mobile handsets vocoders decoding minimum classification error method GMM speech coding speech information transmission 3G mobile communication Speech and audio coding Gaussian processes 3GPP2 selectable mode vocoder Gaussian mixture model Speech processing techniques voice phishing detection

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detection and localization of improvised explosive devices based on 3-axis magnetic sensor array system

Detection and localization of improvised explosive devices b...

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2010 symposium on security detection and information processing

作者： Liu, Renhao Wang, Hua Beijing Univ Aeronaut & Astronaut Sch Astronaut Beijing 100191 Peoples R China

The detection and localization of improvised explosive devices(IEDs) on the roadside is a new subject encountered in the struggle against terrorism. A novel detection and localization method was proposed for IEDs based on magnetic signals. Since most of the IEDs have the ferromagnetic properties, the magnetic field produced around the body by the IED can be detected by 3-axis fluxgate sensor array system. With these detected sensor data, the detection and localization of the IED can be computed by an appropriate method based on magnetic dipole model and nonlinear optimization algorithm. This paper studied respectively the properties of explosives and roads as target and environment to be detected. First, the gradient of total magnetic field was directly reconstructed from the magnetic field and the data of sensor array. In order to reduce the effects of the Earth's magnetic field, the total gradient contraction was used to detect the IEDs. Second, the localization and magnetic moment parameters were searched in the rough by adopting the particle swarm optimization (PSO) algorithm and the precision ones were found by using steepest descent method. Simulation results show that the method mentioned achieves good effects, the maximum detection range of the sensor array can reach to 12m for a 15Am(2) target and the mean errors of localization and magnetic moment estimation are less than 0.16m and 1Am(2) respectively. Since the method need not know the IED's magnetic moment in advance, it is adapt to battlefield environment. In addition, this detection method can be directly applied to solve the problem of detecting and localizing underwater IEDs. (C) 2010 Published by Elsevier Ltd.

关键词： Explosive device detection Magnetic detection Magnetic localization Magnetic dipole model Nonlinear optimization algorithm

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The influence of X-ray wavelength and the simulative human skin and muscle obstruction on the detection of human body-hidden drugs by non-intrusive X-ray diffraction method

The influence of X-ray wavelength and the simulative human s...

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2010 symposium on security detection and information processing

作者： Sun, Bai Li, Minqiang Zhang, Fang Zhong, Yu Yu, Daoyang Lu, Wei Pan, Guoqiang Liu, Jinhuai Chinese Acad Sci Inst Intelligent Machines Key Lab Biomimet Sensing & Adv Robot Technol Hefei 230031 Anhui Peoples R China Univ Sci & Technol China Natl Synchrotron Radiat Lab Hefei 230039 Peoples R China

In order to detect the body-hidden drugs non-intrusively and rapidly, the influence of the X-ray wavelength and covering of the simulative skin and muscle on the detection of methamphetamine sample by synchrotron radiation X-ray diffraction (SR-XRD) technique have been investigated. Synchrotron radiation based X-ray with three different wavelengths (1.29 angstrom, 1.54 angstrom, 1.80 angstrom) has been chosen as the X-ray source. The results indicate that the intensities as well as the number of the diffraction peaks of methamphetamine sample covered by simulative muscle decreased with the increasing of the X-ray wavelength from 1.29 angstrom to 1.80 angstrom. In addition, the intensities of the diffraction peaks for methamphetamine will be seriously affected by the covered simulative skin or muscle due to the X-ray absorption. Furthermore, the absorption of X-ray by the simulative muscle seems much stronger than that of the simulative skin. Moreover, the specific molecular structure of the methamphetamine sample has been obtained by X-ray diffraction method. (c) 2010 Published by Elsevier Ltd.

关键词： drug detection SR-XRD methamphetamine molecular structure

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Centered Hyperspherical and Hyperellipsoidal One-Class Support Vector Machines for Anomaly detection in Sensor Networks

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IEEE TRANSACTIONS ON information FORENSICS AND security 2010年第3期5卷 518-533页

作者： Rajasegarar, Sutharshan Leckie, Christopher Bezdek, James C. Palaniswami, Marimuthu Univ Melbourne Dept Elect & Elect Engn Melbourne Vic 3010 Australia Univ Melbourne Dept Comp Sci & Software Engn Melbourne Vic 3010 Australia

Anomaly detection in wireless sensor networks is an important challenge for tasks such as intrusion detection and monitoring applications. This paper proposes two approaches to detecting anomalies from measurements from sensor networks. The first approach is a linear programming-based hyperellipsoidal formulation, which is called a centered hyperellipsoidal support vector machine (CESVM). While this CESVM approach has advantages in terms of its flexibility in the selection of parameters and the computational complexity, it has limited scope for distributed implementation in sensor networks. In our second approach, we propose a distributed anomaly detection algorithm for sensor networks using a one-class quarter-sphere support vector machine (QSSVM). Here a hypersphere is found that captures normal data vectors in a higher dimensional space for each sensor node. Then summary information about the hyperspheres is communicated among the nodes to arrive at a global hypersphere, which is used by the sensors to identify any anomalies in their measurements. We show that the CESVM and QSSVM formulations can both achieve high detection accuracies on a variety of real and synthetic data sets. Our evaluation of the distributed algorithm using QSSVM reveals that it detects anomalies with comparable accuracy and less communication overhead than a centralized approach.

关键词： Anomaly detection distributed computing information security machine learning outlier detection security support vector machines (SVMs) wireless sensor networks

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SVD for Enhanced Explosives detection Using NQR

SVD for Enhanced Explosives Detection Using NQR

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2010 symposium on security detection and information processing

作者： Zhu, Kairan Su, Tao He, Xuehui Niu, Jinping Xidian Univ Natl Lab Radar Signal Proc Xian 710071 Peoples R China

Nuclear Quadrupole Resonance (NQR) is a solid-state radio frequency (RF) spectroscopic technique, allowing the detection of many high explosives and narcotics. Unlike metal detectors and ground penetrating radar (GPR), NQR detectors measure signals that are unique to the explosives, thus can provide a lower false alarm rate. The practical use of NQR is restricted by the inherently low signal-to-noise ratio (SNR) of the observed signals, a problem that is further exacerbated by the presence of strong RF interference (RFI), so a robust detection method is required. Singular value decomposition (SVD) based on Hankel matrix is proposed to detect the NQR signal in this paper. The original signal can be decomposed into the linear superposition of a series of component signals by SVD using Hankel matrix, and the process of constructing the Hankel matrix shows that a component signal can be produced by averaging the elements on the inverse diagonal of the A(i) = sigma iu(i)v(i)(T). Then an eigendecomposition based spectrum estimator called "MUltiple Signal Characterization" (MUSIC) is applied to estimate power spectrum of each component signal, so the RFI and the noise are canceled by using the priori knowledge of the NQR frequency. Finally, an average power detector is applied to detect NQR signal. The result using measured data shows that the proposed method can provide robust NQR detection performance. (C) 2010 Published by Elsevier Ltd.

关键词： NQR SVD power spectrum estimation MUSIC

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