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检索条件"任意字段=Conference on Mobile Multimedia/Image Processing for Military and Security Applications"

共 179 条记录，以下是31-40 订阅

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Enhancement of node connectivity for mobile ad hoc networks

Enhancement of node connectivity for mobile ad hoc networks

引用

conference on mobile multimedia/image processing for military and security applications

作者： Shi, Xiyu Li, Fanzhi Adams, Christopher Univ Buckingham Dept Informat Syst Buckingham MK18 1EG England

ISBN: (纸本)081946306X

For secure mobile wireless networks whose topologies are changed dynamically in insecure environments, mobile users need to keep in contact with each other for the purpose of user authentications. For instance, the network formed by a group of soldiers equipped with wireless devices in a battlefield. Maintaining a high connectivity is crucial in such networks in order to authenticate scattered individuals and to be able to communicate with each other. To establish connections. different mobile ad hoc network routing protocols have been developed. However, much research has shown that these protocols are incapable of maintaining high connectivity when the node density is lower in the network. This paper proposes a mechanism to enhance the node connectivity, which is specifically effective for mobile ad hoc networks with lower node densities. It selects some nodes with larger transmission power as strategic nodes to assist in establishing connections with remote nodes, which are unable to connect with otherwise. The strategic nodes have the ability to connect with each other. Whenever a remote mobile node has a request to connect to another remote mobile node. the strategic nodes function as normal mobile nodes and may forward the connection requests to the desired remote destination node. The mechanism is simulated in different scenarios with various node densities, and the results show that the node connectivity is generally enhanced with the benefit of lower node density network, gaining significant improvement.

关键词： ad hoc network connectivity AODV MANET route enhancement performance SWANS

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System for Non-Disruptive High Capacity Indexed Data Embedding and Recovery Using multimedia Signal Covers

System for Non-Disruptive High Capacity Indexed Data Embeddi...

引用

conference on mobile multimedia/image processing, security, and applications 2011

作者： Collins, James C. Agaian, Sos S. Univ Texas San Antonio Multimedia & Mobile Signal Proc Lab San Antonio TX USA

ISBN: (纸本)9780819486370

Over the past several years there has been an apparent shift in research focus in the area of digital steganography and steganalysis - a shift from primarily image based methods to a new focus on broader multimedia techniques. More specifically the area of digital audio steganography is of prime interest. We introduce a new high capacity, covert channel data embedding and recovery system for digital audio carrier files using a key based encoding and decoding method. It will be shown that the added information file is interleaved within the carrier file and is fully indexed allowing for segmented extraction and recovery of data at chosen start and stop points in the sampled stream. The original audio quality is not affected by the addition of this covert data. The embedded information can also be secured by a binary key string or cryptographic algorithm and resists statistical analytic detection attempts. We will also describe how this new method can be used for data compression and expansion applications in the transfer and storage of digital multimedia to increase the overall data capacity and security.

关键词： steganography embedding multimedia quantization audio

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Q-filter structures with applications in mobile communication systems

Q-filter structures with applications in mobile communicatio...

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conference on mobile multimedia/image processing, security, and applications

作者： Mohamed, Magdi A. Xiao, Weimin Motorola Labs Phys & Digital Realizat Res CoE Schaumburg IL 60196 USA

ISBN: (纸本)9780819471734

An advanced approach for adaptive nonlinear digital data processing is described in this article. Three primal computational structures referred to as Q-Measures, Q-Metrics, and Q-Aggregates are introduced and utilized in unison as highly adaptive data analysis handlers. The proposed approach relies on universal functionals using few parameters to characterize dynamic system behaviors in broad ranges of unconventional measure, metric, and aggregation spaces. We present this unique approach in application to real-valued signal processing tasks, with Suitable optimization algorithms, so that the parameters of the proposed models can be tuned automatically. The new approach is tested on real data sets to enable applications in mobile communication systems and the experiments show promising results.

关键词： Q-Measures Q-Metrics Q-Aggregates and Q-filters

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Reduced memory JPEG decompression for mobile devices

Reduced memory JPEG decompression for mobile devices

引用

conference on mobile multimedia/image processing for military and security applications

作者： Ioup, Elias Z. Mesick, Hillary Sample, John T. McCreedy, Frank P. USN Stennis Space Ctr Res Lab Stennis Space Ctr MS 39529 USA

ISBN: (纸本)081946306X

imagery makes up a large percentage of geospatial data in use today. One feature of this imagery is that it tends to be large, often hundreds or thousands of megabytes. As a result JPEG compression is often used to make geospatial imagery manageable by reducing the file size without greatly reducing the quality of the image. However, the benefits of compression are absent when the image must be viewed. Viewing a large JPEG image requires decompressing and holding the uncompressed version in memory. Holding the entirety of a large image in memory is a burden on many systems and sometimes impossible. However, the entire image is rarely needed at full resolution. Usually only a small area of interest is viewed or processed. This paper describes a method of removing a small area of interest from a large JPEG without decompressing the entire image. JPEG compressed images axe streams which cannot be randomly accessed. Viewing a particular area requires that all preceding areas be partially decompressed. This process is more efficient than fully decompressing the whole JPEG, but depending on the area requested the entire image may need to be partially decompressed. To circumvent this problem an index file is created on first decompression which records markers for the sections of the JPEG. The index file allows random access to the JPEG file so that areas may be decompressed without reading the preceding portions of the JPEG. This method of decompressing a JPEG requires a limited amount of memory and with an index file is fast enough to be performed in real time.

关键词： JPEG decompression imagery low memory

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Examination of mobile phones in a university forensic lab environment

Examination of mobile phones in a university forensic lab en...

引用

conference on mobile multimedia/image processing, security, and applications 2011

作者： Luttenberger, Silas Kroeger, Knut Creutzburg, Reiner Brandenburg Univ Appl Sci Dept Informat & Media D-14770 Brandenburg Germany

ISBN: (纸本)9780819486370

The aim of this article is to show forensic investigation methods for mobile phones to students in a university forensic lab environment. Students have to learn the usefulness of forensic procedures to ensure evidence collection, evidence preservation, forensic analysis, and reporting. Open source tools as well as commercial forensic tools for forensic investigation of modern mobile (smart) phones are used. It is demonstrated how important data stored in the mobile device are investigated. Different scenarios of investigations are presented that are well-suited for forensics lab work in university.

关键词： Cell phone forensics forensics for mobile devices cell phone mobile phone forensics Smartphone forensics iPhone forensics

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Novel technology for enhanced security and trust in communication networks

Novel technology for enhanced security and trust in communic...

引用

conference on mobile multimedia/image processing, security, and applications 2011

作者： Milovanov, Alexander Bukshpun, Leonid Pradhan, Ranjit Jannson, Tomasz Phys Opt Corp Torrance CA 90501 USA

ISBN: (纸本)9780819486370

A novel technology that significantly enhances security and trust in wireless and wired communication networks has been developed. It is based on integration of a novel encryption mechanism and novel data packet structure with enhanced security tools. This novel data packet structure results in an unprecedented level of security and trust, while at the same time reducing power consumption and computing/communication overhead in networks. As a result, networks are provided with protection against intrusion, exploitation, and cyber attacks and posses self-building, self-awareness, self-configuring, self-healing, and self-protecting intelligence.

关键词： Cyber security Wireless security ad hoc network Encryption Trust

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Accuracy, security, and processing time comparisons of biometric fingerprint recognition system using digital and optical enhancements

Accuracy, security, and processing time comparisons of biome...

引用

conference on mobile multimedia/image processing, security, and applications 2011

作者： Alsharif, Salim El-Saba, Aed Jagapathi, Rajendarreddy Univ S Alabama Dept Elect & Comp Engn Mobile AL 36688 USA

ISBN: (纸本)9780819486370

Fingerprint recognition is one of the most commonly used forms of biometrics and has been widely used in daily life due to its feasibility, distinctiveness, permanence, accuracy, reliability, and acceptability. Besides cost, issues related to accuracy, security, and processing time in practical biometric recognition systems represent the most critical factors that makes these systems widely acceptable. Accurate and secure biometric systems often require sophisticated enhancement and encoding techniques that burdens the overall processing time of the system. In this paper we present a comparison between common digital and optical enhancement\encoding techniques with respect to their accuracy, security and processing time, when applied to biometric fingerprint systems.

关键词： Biometric system Laplacian enhanced filter Prewitt enhanced filter optical enhancement/encoding filter-adjusted joint transform correlation fingerprint identification

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INFORMATION security TRADES IN TACTICAL WIRELESS NETWORKS

INFORMATION SECURITY TRADES IN TACTICAL WIRELESS NETWORKS

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conference on mobile multimedia/image processing, security, and applications

作者： Kurdziel, Michael T. Alvermann, John A. Harris Corp RF Commun Div Rochester NY 14610 USA

ISBN: (纸本)9781628416138

Wireless networks are now ubiquitous across the tactical environment. They offer unprecedented communications and data access capabilities. However, providing information security to wireless transmissions without impacting performance is a challenge. The information security requirement for each operational scenario presents a large trade space for functionality versus performance. One aspect of this trade space pertains to where information security services are integrated into the protocol stack. This paper will present an overview of the various options that exist and will discuss the advantages and disadvantages of each option.

关键词： Tactical networks Information Assurance OSI Reference Model Internet Protocol Suite Tactical Network Protocol Stack TCP/IP

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A New Approach for Willingness Test in Biometric Systems

A New Approach for Willingness Test in Biometric Systems

引用

conference on mobile multimedia/image processing, security, and applications 2011

作者： Yang, Kai Du, Eliza Yingzi Zhou, Zhi Indiana Univ Purdue Univ Dept Elect & Comp Engn Indianapolis IN 46202 USA

ISBN: (纸本)9780819486370

Biometrics identifies/verifies a person using his/her physiological or behavioral characteristics. It is becoming an important ally for law enforcement and homeland security. However, there are some safety and privacy concerns: biometric based systems can be accessed when users are under threat, reluctant or even unconscious states. In this paper, we introduce a new method which can identify a person and detect his/her willingness. Our experimental results show that the new approach can enhance the security by checking the consent signature while achieving very high recognition accuracy.

关键词： willingness test consent biometrics security privacy

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Ensuring security of H.264 videos by using watermarking

Ensuring security of H.264 videos by using watermarking

引用

conference on mobile multimedia/image processing, security, and applications 2011

作者： Chaumont, Marc Univ Nimes F-30000 Nimes France

ISBN: (纸本)9780819486370

Watermarking is known to be a very difficult task. Robustness, Distortion, Payload, security, Complexity are many constraints to deal with. When applied to a video stream, the difficulty seems to be growing in comparison to image watermarking. Many classical non malicious manipulations of a compressed stream may suppress the embedded information. For example, a simple re-compression of a DVD movie (MPEG2 compression) to a DivX movie will defeat most of the current state-of-the-art watermarking systems. In this talk, we will expose the different techniques in order to watermark a video compressed stream. Before, we will present the H.264/AVC standard which is one of the most powerful video-compression algorithms. The discussion about video watermarking will be illustrated with H.264 streams. The specific example of traitor tracing will be presented. Deadlocks will be discussed, and then the possible extensions and the future applications will conclude the presentation.

关键词： State of the art Tutorial Watermarking H.264 Joint watermarking and video compression security applications Traitor Tracing

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