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检索条件"任意字段=Mobile Multimedia/Image Processing for Military and Security Applications 2007"

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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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Multiple masks based pixel comparison steganalysis method for mobile Imaging

Multiple masks based pixel comparison steganalysis method fo...

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

作者： Agaian, Sos S. Peterson, Gilbert L. Rodriguez, Benjamin M. Univ Texas Dept Elect & Comp Engn Multimedia & Mobile Signal Proc Lab San Antonio TX 78285 USA Grad Sch Engn & Management Air Force Inst Technol Dept Elect & Comp Engn Wright Patterson AFB OH 45433 USA

ISBN: (纸本)081946306X

Steganalysis has many challenges;which include the accurate and efficient detection of hidden content within digital images. This paper focuses on the development of a new multi pixel comparison method used for the detection of steganographic content within digital images transmitted over mobile channels. The sensitivity of detecting hidden information within a digital image can be increased or decreased to determine if slight changes have been made to the digital image for the target of blind steganalysis. The key thought of the presented method is to increase the sensitivity of features when alterations are made within the bit planes of a digital image. The differences between the new method and existing pixel comparison methods are;multiple masks of different sizes are used to increase the sensitivity and weighted features are used to improve the classification of the feature sets. Weights are also used with the various pixel comparisons to ensure proper sensitivity when detecting small changes. The article also investigates the reliability of detection and estimation length of hidden data within wireless digital images with potential for military applications emphasizing on defense and security.

关键词： steganography steganalysis feature selection support vector machine classifier mobile imaging

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Secure image communication for network applications

Secure image communication for network applications

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

作者： Lian, Shiguo Liu, Zhongxuan Wang, Jinwei Ren, Zhen Wang, Haila France Telecom Res & Dev Beijing Beijing 100080 Peoples R China Nanjing Univ Sci & Technol Dept Automat Nanjing PR-210094 Peoples R China

ISBN: (纸本)081946306X

A secure image transmission scheme based on JPEG2000 codec is proposed in this paper, which combines encryption with encoding and is suitable for real-time applications. In this scheme, the sensitive data are self-authenticated, then partial-encrypted during compression process, and the compressed data are encrypted by the lightweight encryption algorithm combined with error-correction codec. The self-authentication process can detect malicious tampering or transmission errors. The encryption process obtains suitable tradeoff between security and time-efficiency through encrypting data adaptively, and keeps the original system's error-robustness. The decryption process is symmetric to the encryption process. Experimental results show that this scheme obtains high perception security and time efficiency, and is thus suitable for secure image transmission over network.

关键词： watermarking image encryption image authentication digital right management

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Secure steganography designed for mobile platforms

Secure steganography designed for mobile platforms

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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...

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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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A new JPEG-Based steganographic algorithm for mobile devices

A new JPEG-Based steganographic algorithm for mobile devices

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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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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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Log-polar based framework for mobile vehicle tracking with road follower

Log-polar based framework for mobile vehicle tracking with r...

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

作者： Melnyk, Pavlo B. Messner, Richard A. Univ New Hampshire ECE Dept 33 Coll Rd Durham NH 03824 USA

ISBN: (纸本)9780819467010

A new computationally efficient framework for vehicle tracking on a mobile platform is proposed. The principal component of the framework is the log-polar transformation applied to video frames captured from a standard uniformly sampled format camera. The log-polar transformation provides two major benefits to real-time vehicle tracking from a mobile vehicle platform moving along a single or multi-lane road. First, it significantly reduces the amount of data required to be processed since it collapses the original Cartesian video frames into log-polar images with much smaller dimensions. Second, the log-polar transformation is capable of mitigating perspective distortion due to its scale invariance property. This second aspect is of interest for vehicle tracking because the target vehicle appearance is preserved for all distances from the observer (camera). This works however only if the center of log-polar transformation is coincident with the vanishing point of perspective view. Therefore, a road following algorithm is proposed to keep the center of log-polar transform on the vanishing point at every video frame compensating for the carrying vehicle movements. Since the algorithm is intended to be used in the mobile embedded devices, it is developed to achieve both mathematical simplicity and algorithmic efficiency while avoiding computationally expensive mathematical functions. The use of trigonometric and exponential functions is minimized comparing to the log-Hough transform traditionally used in log-polar space. This new algorithm focuses on straight radial line fragments, thus shifting its mathematical engine to the linear equations' domain.

关键词： log-polar vehicle tracking computer vision

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Solving Data at Rest for the Storage and Retrieval of Files in Ad Hoc Networks

Solving Data at Rest for the Storage and Retrieval of Files ...

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

作者： Knobler, Ron Scheffel, Peter Williams, Jonathan Gaj, Kris Kaps, Jens Peter McQ Inc 1551 Forbes St Fredericksburg VA USA George Mason Univ Fairfax VA 22030 USA

ISBN: (纸本)9780819495464

Based on current trends for both military and commercial applications, the use of mobile devices (e. g. smartphones and tablets) is greatly increasing. Several military applications consist of secure peer to peer file sharing without a centralized authority. For these military applications, if one or more of these mobile devices are lost or compromised, sensitive files can be compromised by adversaries, since COTS devices and operating systems are used. Complete system files cannot be stored on a device, since after compromising a device, an adversary can attack the data at rest, and eventually obtain the original file. Also after a device is compromised, the existing peer to peer system devices must still be able to access all system files. McQ has teamed with the Cryptographic Engineering Research Group at George Mason University to develop a custom distributed file sharing system to provide a complete solution to the data at rest problem for resource constrained embedded systems and mobile devices. This innovative approach scales very well to a large number of network devices, without a single point of failure. We have implemented the approach on representative mobile devices as well as developed an extensive system simulator to benchmark expected system performance based on detailed modeling of the network/radio characteristics, CONOPS, and secure distributed file system functionality. The simulator is highly customizable for the purpose of determining expected system performance for other network topologies and CONOPS.

关键词： data at rest distributed file system directory service mesh network mobile device security decentralized architecture avoid single point of failure ad hoc network

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