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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11-20 订阅

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Secure steganography designed for mobile platforms

Secure steganography designed for mobile platforms

引用

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

作者： Agaian, Sos S. Cherukuri, Ravindranath Sifuentes, Ronnie R. Univ Texas MMSP Lab 6900 N Loop 1604 W San Antonio TX 78249 USA

ISBN: (纸本)081946306X

Adaptive steganography, an intelligent approach to message hiding, integrated with matrix encoding and pn-sequences serves as a promising resolution to recent security assurance concerns. Incorporating the above data hiding concepts with established cryptographic protocols in wireless communication would greatly increase the security and privacy of transmitting sensitive information. We present an algorithm which will address the following problems: 1) low embedding capacity in mobile devices due to fixed image dimensions and memory constraints, 2) compatibility between mobile and land based desktop computers, and 3) detection of stego images by widely available steganalysis software [1-3]. Consistent with the smaller available memory, processor capabilities, and limited resolution associated with mobile devices, we propose a more magnified approach to steganography by focusing adaptive efforts at the pixel level. This deeper method, in comparison to the block processing techniques commonly found in existing adaptive methods, allows an increase in capacity while still offering a desired level of security. Based on computer simulations using high resolution, natural imagery and mobile device captured images, comparisons show that the proposed method securely allows an increased amount of embedding capacity but still avoids detection by varying steganalysis techniques.

关键词： steganography t-order statistics pn-sequence matrix encoding wireless security mobile applications

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The mathematical theory of signal processing and compression-designs

The mathematical theory of signal processing and compression...

引用

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

作者： Feria, Erlan H. CUNY Coll Staten Isl Dept Engn Sci & Phys Staten Isl NY 10314 USA

ISBN: (纸本)081946306X

The fundamentals of the mathematical theory of signal processing, named processor coding, will be shown to inherently arise as the computational time compression dual of Shannon's mathematical theory of communication which is also known as source coding. Source coding is concerned with signal source memory space compression while processor coding addresses 'Signal processor computational time compression. Their combination is named compression-designs and referred as Conde in short. A compelling and pedagogically appealing diagram will be discussed highlighting its successful application to real-world knowledge-aided (KA) airborne moving target indicator (AMTI) radar.

关键词： source coding processor coding bit bor information latency entropy ectropy source coder processor coder duality space compression time compression compression-designs Conde

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RHINO: Armoured plated networking with intelligent high speed wireless Ad-Hoc capability

RHINO: Armoured plated networking with intelligent high spee...

引用

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

作者： Markarian, Garik Singh, Farid Univ Lancaster Lancaster LA1 4YW England Britannia 2000 Ltd White Waltham England

ISBN: (纸本)9780819471734

This paper describes the concept of an intelligent high speed wireless ad-hoc network, which is currently being developed The technology aims at, not replacing any of the existing standards, but aims to complement them in urban, military and hazardous environments. Known as Rhino, the technology is a platform independent, IP based network which will provide adequate bandwidth for real time video, audio and data traffic. The technology and specifications described in this paper are based on initial development of the technology.

关键词： Video Standards development Video surveillance Telecommunications Computer security Modulation Network security Defense and security Information security Prototyping

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A new JPEG-Based steganographic algorithm for mobile devices

A new JPEG-Based steganographic algorithm for mobile devices

引用

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

作者： Agaian, Sos S. Cherukuri, Ravindranath Schneider, Erik C. White, Gregory B. Univ Texas Multimedia & Mobile Signal Proc Lab 6900 N Loop 1604 W San Antonio TX 78249 USA Univ Texas Ctr Infrastruct Assurance & secur San Antonio TX 78249 USA

ISBN: (纸本)081946306X

Currently, cellular phones constitute a significant portion of the global telecommunications market. Modem cellular phones offer sophisticated features such as Internet access, on-board cameras, and expandable memory which provide these devices with excellent multimedia capabilities. Because of the high volume of cellular traffic, as well as the ability of these devices to transmit nearly all forms of data. The need for an increased level of security in wireless communications is becoming a growing concern. Steganography could provide a solution to this important problem. In this article, we present a new algorithm for JPEG-compressed images which is applicable to mobile platforms. This algorithm embeds sensitive information into quantized discrete cosine transform coefficients obtained from the cover JPEG. These coefficients are rearranged based on certain statistical properties and the inherent processing and memory constraints of mobile devices. Based on the energy variation and block characteristics of the cover image, the sensitive data is hidden by using a switching embedding technique proposed in this article. The proposed system offers high capacity while simultaneously withstanding visual and statistical attacks. Based on simulation results, the proposed method demonstrates an improved retention of first-order statistics when compared to existing JPEG-based steganographic algorithms, while maintaining a capacity which is comparable to F5 for certain cover images.

关键词： mobile devices JPEG steganography steganalysis secure communication

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Human visual system based image enhancement

Human visual system based image enhancement

引用

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

作者： Wharton, Eric J. Panetta, Karen A. Agaian, Sos S. Tufts Univ Dept Elect & Comp Engn 161 Coll Ave Medford MA 02155 USA Univ Texas San Antonio Coll Engn San Antonio TX 78249 USA

ISBN: (纸本)9780819467010

This paper presents a method of image enhancement using an adaptive thresholding method based on the human visual system. We utilize a number of different enhancement algorithms applied selectively to the different regions of an image to achieve a better overall enhancement than applying a single technique globally. The presented method is useful for images that contain various regions of improper illumination. It is also practical for correcting shadows. This thresholding system allows various enhancement algorithms to be used on different sections of the image based on the local visual characteristics. It further allows the parameters to be tuned differently for the specific regions, giving a more visually pleasing output image. We demonstrate the algorithm and present results for several high quality images as well as lower quality images such as those captured using a cell phone camera. We then compare and contrast our method to other state-of-the-art enhancement algorithms.

关键词： human vision image enhancement performance measure logarithmic image processing

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On privacy-protected outsourced processing for mobile multimedia

On privacy-protected outsourced processing for mobile multim...

引用

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

作者： Svendsen, Tristen Wang, Zhaohong Calif State Univ Chico Elect & Comp Engn Dept Chico CA 95929 USA

ISBN: (纸本)9781510626522

mobile devices are usually computationally restricted in carrying out complicated processing algorithms on its multimedia document. While cloud computing provides resources for customers, a major concern is the customer data's privacy and security. The information-theoretic secure (ITS) approach has some advantages over the homomorphic encryption approach. ITS is faster and requires much shorter encryption. In this paper, we proposed a framework based on the ITS paradigm using the linear secret sharing scheme for image and audio processing tasks on mobile devices. Our experiments were carried out on the Amazon EC2 commercial cloud platform with better performance than existing ones.

关键词： Manuscript format template SPIE Proceedings LaTeX

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Network friendly media security: Rationales, solutions, and open issues

Network friendly media security: Rationales, solutions, and ...

引用

International conference on image processing (ICIP 2004)

作者： Zeng, WJ Zhuang, XH Lan, JQ Univ Missouri Dept Comp Sci Columbia MO 65211 USA

ISBN: (纸本)0780385543

Network friendly media security refers to the security technologies that are specifically designed to cope with existing and future multimedia networking infrastructures and technologies so as to case the deployment and maintain or improve the quality of service performance Of multimedia applications. It is especially useful for streaming and mobile multimedia applications where content adaptation is a necessity. In this paper, we analyze the various motivations behind network-friendly security solutions, review some of the most recent approaches, discuss some open issues, and Suggest some potential solutions.

关键词： security of data

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Multi-level signature based biometric authentication using watermarking

Multi-level signature based biometric authentication using w...

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

作者： Maiorana, Emanuele Campisi, Patrizio Neri, Alessandro Univ Roma Tre Dip Elettr Applicata Via Vasca Navale 84 I-00146 Rome Italy

ISBN: (纸本)9780819467010

In the last decade a lot of efforts have been devoted to the development of biometrics-based authentication systems. In this paper we propose a signature-based biometric authentication system, where watermarking techniques are used to embed some dynamic signature features in a static representation of the signature itself, stored either in a centralized database or in a smartcard. The user authentication can be performed either by using some static features extracted from the acquired signature or by using both the aforementioned static features together with the dynamic features embedded in the enrollment stage. A multi-level authentication system, which is capable to provide various degree of security, is thus obtained. The proposed watermarking techniques are tailored to images with sharp edges, like a signature picture, in order to obtain a robust embedding method while keeping intact the original structure of the host signal. Experimental results show the two different levels of security which can be reached when either static features or both static and dynamic features are employed in the authentication process.

关键词： Digital watermarking Biometrics Radon Radon transform Feature extraction image segmentation Wavelets CRTs Information security Databases

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Steganography anomaly detection using simple one-class classification

Steganography anomaly detection using simple one-class class...

引用

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

作者： Rodriguez, Benjamin M. Peterson, Gilbert L. Agaian, Sos S. Univ Texas Dept Elect & Comp Engn San Antonio TX 78285 USA Univ Texas San Antonio Dept Elect & Comp Engn Multimedia & Mobile Signal Proc Lab San Antonio TX USA

ISBN: (纸本)9780819467010

There are several security issues tied to multimedia when implementing the various applications in the cellular phone and wireless industry. One primary concern is the potential ease of implementing a steganography system. Traditionally, the only mechanism to embed information into a media file has been with a desktop computer. However, as the cellular phone and wireless industry matures, it becomes much simpler for the same techniques to be performed using a cell phone. In this paper, two methods are compared that classify cell phone images as either an anomaly or clean, where a clean image is one in which no alterations have been made and an anomalous image is one in which information has been hidden within the image. An image in which information has been hidden is known as a stego image. The main concern in detecting steganographic content with machine learning using cell phone images is in training specific embedding procedures to determine if the method has been used to generate a stego image. This leads to a possible flaw in the system when the learned model of stego is faced with a new stego method which doesn't match the existing model. The proposed solution to this problem is to develop systems that detect steganography as anomalies, making the embedding method irrelevant in detection. Two applicable classification methods for solving the anomaly detection of steganographic content problem are single class support vector machines (SVM) and Parzen-window. Empirical comparison of the two approaches shows that Parzen-window outperforms the single class SVM most likely due to the fact that Parzen-window generalizes less.

关键词： classification steganography steganalysis anomaly detection

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Switching theory-based steganographic system for JPEG images

Switching theory-based steganographic system for JPEG images

引用

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

作者： Cherukuri, Ravindranath C. Agaian, Sos. S. Univ Texas Mobile Multimedia Signal Proc Lab 1 UTSA Circle San Antonio TX 78249 USA

ISBN: (纸本)9780819467010

Cellular communications constitute a significant portion of the global telecommunications market. Therefore, the need for secured communication over a mobile platform has increased exponentially. Steganography is an art of hiding critical data into an innocuous signal, which provide answers to the above needs. The JPEG is one of commonly used format for storing and transmitting images on the web. In addition, the pictures captured using mobile cameras are in mostly in JPEG format. In this article, we introduce a switching theory based steganographic system for JPEG images which is applicable for mobile and computer platforms. The proposed algorithm uses the fact that energy distribution among the quantized AC coefficients varies from block to block and coefficient to coefficient. Existing approaches are effective with a part of these coefficients but when employed over all the coefficients they show there ineffectiveness. Therefore, we propose an approach that works each set of AC coefficients with different frame work thus enhancing the performance of the approach. The proposed system offers a high capacity and embedding efficiency simultaneously withstanding to simple statistical attacks. In addition, the embedded information could be retrieved without prior knowledge of the cover image. Based on simulation results, the proposed method demonstrates an improved embedding capacity over existing algorithms while maintaining a high embedding efficiency and preserving the statistics of the JPEG image after hiding information.

关键词： steganography covert communication data hiding switching theory JPEG

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