A Hierarchical Key Pre-distribution Scheme (2009)
Mahalingam Ramkumar, Nasir Memon, Rahul Simha
We present an efficient, scalable, and renewable hierarchical random key predistribution (KPD) scheme as an enabler for a low complexity security infrastructure. As the proposed KPD scheme employs...
DOI: 10.1007/s11265-005-4153-1 Data Masking: A New Approach for Steganography? (2009)
Regunathan Radhakrishnan, Mehdi Kharrazi, Nasir Memon
Abstract. It is well known that encryption provides secure channels for communicating entities. However, due to lack of covertness on these channels, an eavesdropper can identify encrypted streams...
STEGANALYSIS OF HALFTONE IMAGES (2009)
Ming Jiang, Edward K. Wong, Nasir Memon, Xiaolin Wu
In this paper, we present a novel steganalysis technique for halftone images without knowledge of the original cover image. We first convert halftone images into grayscale-like images by low-pass...
BLIND SOURCE CAMERA IDENTIFICATION (2009)
Mehdi Kharrazi, Husrev T Sencur, Nasir Memon
An interesting prohlem in digital forensics is that given a digital image, would it he possihle to identify the camera model which was used to obtain the image. In this paper we look at a simplified...
Digital Single Lens Reflex Camera Identification From Traces of Sensor Dust (2009)
Ahmet Emir Dirik, Husrev Taha Sencar, Nasir Memon
Abstract—Digital single lens reflex cameras suffer from a wellknown sensor dust problem due to interchangeable lenses that they deploy. The dust particles that settle in front of the imaging sensor...
Abstract Obfuscation of Design Intent in Object-Oriented Applications ∗ (2009)
Mikhail Sosonkin, Gleb Naumovich, Nasir Memon
Protection of digital data from unauthorized access is of paramount importance. In the past several years, much research has concentrated on protecting data from the standpoint of confidentiality,...
Abstract ON THE INVERTIBILITY OF INVISIBLE WATERMARKING TECHNIQUES (2009)
In this paper we address the invertibility of invisible watermarking schemes for resolving rightful ownerships, and present attacks which can cause confusion to rightful claims. We shall show that...
Modeling Misbehavior in Cooperative Diversity: A Dynamic Game Approach (2009)
Cooperative diversity protocols are designed with the assumption that terminals always help each other in a socially efficient manner. This assumption may not be valid in commercial wireless networks...
Modeling Misbehavior in Cooperative Diversity: A Dynamic Game Approach (2009)
Cooperative diversity protocols are designed with the assumption that terminals always help each other in a socially efficient manner. This assumption may not be valid in commercial wireless networks...
Abstract Authentication Using Graphical Passwords: Basic Results (2008)
Jim Waters, Jean-camille Birget, Alex Brodskiy, Nasir Memon
Access to computer systems is most often based on the use of alphanumeric passwords. However, users have difficulty remembering a password that is long and random-appearing. Instead, they create...
AN ASYMMETRIC LOSSLESS IMAGE COMPRESSION TECHNIQUE (2008)
Lossless image compression is often required in situa-tions where compression is done once and decompres-sion is to be performed a multiple number of times. Since compression is performed only once,...
KPI: A Security Infrastructure for Trusted Devices (2008)
Mahalingam Ramkumar, Nasir Memon
Deployments of perhaps billions of autonomous, heterogeneous wireless devices, some fixed and some mobile, manufactured by different vendors, with varying capabilities, and very different purposes,...
DESIGN OF A LABORATORY FOR INFORMATION SECURITY EDUCATION (2008)
Vikram Anantapadmanabhan, Nasir Memon, Phyllis Frankl
Abstract It has been recognized for some time now that education in information security is better served by a laboratory component that reinforces principle and theoretical analysis learnt in the...
The Pre-history and Future of the Block-Sorting Compression Algorithm (2008)
Mike Burrows, David Wheeler, Lee Butterman, Nasir Memon, Paolo Ferragina, Raffaele Giancarlo, ...
2
Kulesh Shanmugasundaram, Nasir Memon
Reassembly of fragmented objects from a collection of randomly mixed fragments is a common problem in classical forensics. In this paper we address the digital forensic equivalent, i.e., reassembly...
Dan Chen, Nasir Memon, Xiaolin Wu
Recent advances in three-dimensional acquisition, simulation, and design technologies have led to the generation of large polygonal meshes in 3D graphics. The emerging demand for efficiently storing,...
Mehdi Kharrazi, Nasir Memon, Bülent Sankur
We present a novel technique for steganalysis of images that have been subjected to embedding by steganographic algorithms. The seventh and eighth bit planes in an image are used for the computation...
Polytechnic University Abstract (2008)
Digital watermarks have recently been proposed for the purposes of copy protection
Data Masking: A New Approach for Data Hiding? (2008)
Regunathan Radhakrishnan, Mehdi Kharrazi, Nasir Memon
It is well known that encryption provides secure channels for communicating entities. However, due to lack of covertness on these channels, an eavesdropper can identify encrypted streams through...
STEGANALYSIS OF DEGRADED DOCUMENT IMAGES (2008)
Ming Jiang, Edward K. Wong, Nasir Memon
In this paper, a steganalysis technique using compression bit rate as a distinguishing statistic is presented to detect secret messages embedded in document images that are degraded in quality by...
Information Flow Based Routing Algorithms for Wireless Sensor Networks (2008)
Yeling Zhang, Ramkumar Mahalingam, Nasir Memon
Abstract. This paper introduces a measure of information as a new criteria for the performance analysis of routing algorithms in wireless sensor networks. We argue that since the objective of a...
Compressing File Collections with a TSP-Based Approach (2008)
Dimitre Trendafilov, Nasir Memon, Torsten Suel, Dimitre Trendafilov, Nasir Memon, Torsten Suel
Delta compression techniques solve the problem of encoding a given target file with respect to one or more reference files. Recent work in [15, 12, 7] has demonstrated the benefits of using such...
ABSTRACT Watermarking and Ownership Problem: A Revisit (2008)
Watermarking technologies have been envisioned as a potential means for establishing ownership on digital media objects. However, achievable robustness and false-positive rates of the...
Alphabet partitioning techniques for semi-adaptive Huffman coding of large alphabets (2008)
Dan Chen, Dan Chen, Yi-jen Chiang, Yi-jen Chiang, Nasir Memon, Nasir Memon, ...
Practical applications that employ entropy coding for large alphabets often partition the alphabet set into two or more layers and encode each symbol by using some suitable prefix coding for each...
Dan Chen, Yi-jen Chiang, Nasir Memon, Xiaolin Wu
Abstract — In this paper we investigate the problem of lossless geometry compression of irregular-grid volume data represented as a tetrahedral mesh. We propose a novel lossless compression...
Lossless Geometry Compression for Steady-State and Time-Varying Irregular Grids † (2008)
Thomas Ertl, Ken Joy, Beatriz Santos (editors, Dan Chen, Yi-jen Chiang, Nasir Memon, ...
In this paper we investigate the problem of lossless geometry compression of irregular-grid volume data represented as a tetrahedral mesh. We propose a novel lossless compression technique that...
Image Steganography and Steganalysis: Concepts and Practice (2008)
Rajarathnam Ch, Mehdi Kharrazi, Nasir Memon
Abstract. In the last few years, we have seen many new and powerful steganography and steganalysis techniques reported in the literature. In the following paper we go over some general concepts and...
Mehdi Kharrazi, Husrev T. Sencar, Nasir Memon
In the last few years, we have seen many new and powerful steganography and steganalysis techniques reported in the literature. In the following tutorial we go over some general concepts and ideas...
ESIMS - An Ecient Key Predistribution Scheme (2008)
Mahalingam Ramkumar Nasir, Nasir Memon
SIMS (Secure Interaction of Mobile Strangers) [1] is a highly scalable, renewable, key predistribution scheme suitable for resource constrained nodes that need to operate without a trusted authority...
Alphabet Partitioning Techniques for (2008)
Dan Chen, Yi-jen Chiang, Nasir Memon, Xiaolin Wu
Practical applications that employ entropy coding for large alphabets often partition the alphabet set into two or more layers and encode each symbol by using some suitable prefix coding for each...
An Analysis of Some Common Scanning Techniques For Lossless Image Coding (2007)
Nasir Memon, David Neuhoff, Sunil Shende
Though most image coding techniques use a raster scan to order pixels prior to coding, Hilbert and other scans have been proposed as having better performance due to their superior locality...
Anthony Vetro, Major Electrical Engineering, Yao Wang, Onur G. Guleryuz, Huifang Sun, Nasir Memon
by
Abstract ON THE INVERTIBILITY OF INVISIBLE WATERMARKING TECHNIQUES (2007)
In this paper we address the invertibility of invisible watermarking schemes for resolving rightful ownerships, and present attacks which can cause confusion to rightful claims. We shall show that...
On the Scalability of an Image Transcoding Proxy Server (2007)
Anubhav Savant, Nasir Memon, Torsten Suel
Image transcoding proxies are used to improve Web browsing over low bandwidth networks by adapting content-rich web images to bandwidth-constrained clients. Such transcoding proxies dynamically...
Pre-Loaded Key Based Multicast and Broadcast (2007)
Authentication In Mobile, Mahalingam Ramkumar, Nasir Memon
The nature of Mobile Ad hoc NETworks (MANET), demands stringent requirements on primitives that could be used to secure such networks. Mobility imposes restrictions on memory and processor...
1 Security of Random Key Pre-distribution Schemes With Limited Tamper Resistance (2007)
Mahalingam Ramkumar, Nasir Memon
Abstract--- Key pre-distribution (KPD) schemes, are inherently trade-offs between security and complexity, and are perhaps well suited for securing large-scale deployments of resource constrained...
Secure Biometric Templates from Fingerprint-Face Features (2007)
Yagiz Sutcu, Qiming Li, Nasir Memon
Since biometric data cannot be easily replaced or revoked, it is important that biometric templates used in biometric applications should be constructed and stored in a secure way, such that...
Secure sketch for biometric templates (2006)
Qiming Li, Yagiz Sutcu, Nasir Memon
Abstract. There have been active discussions on how to derive a consistent cryptographic key from noisy data such as biometric templates, with the help of some extra information called a sketch. It...
Perceptual Audio Hashing Functions (2005)
Hamza Özer, Bülent Sankur, Nasir Memon
Perceptual hash functions provide a tool for fast and reliable identification of content. We present new audio hash functions based on summarization of the time-frequency spectral characteristics of...
Image Steganalysis with Binary Similarity Measures (2005)
Mehdi Kharrazi, Nasir Memon, Bülent Sankur
We present a novel technique for steganalysis of images that have been subjected to embedding by steganographic algorithms. The seventh and eighth bit planes in an image are used for the computation...
Dan Chen, Nasir Memon, Xiaolin Wu
Abstract Practical applications that employ entropy coding for large alphabets often partition the alphabet set into two or more layers and encode each symbol by using some suitable prefix coding for...
Authentication Using Graphical Passwords: Effects of Tolerance and Image Choice (2005)
Susan Wiedenbeck, Jim Waters, Alex Brodskiy, Nasir Memon
Graphical passwords are an alternative to alphanumeric passwords in which users click on images to authenticate themselves rather than type alphanumeric strings. We have developed one such system,...
Geometry Compression Of Tetrahedral Meshes Using Optimized (2005)
Prediction Dan Chen, Dan Chen, Yi-jen Chiang, Nasir Memon, Xiaolin Wu
In this paper we propose a novel geometry compression technique for volumetric datasets represented as tetrahedral meshes. We focus on a commonly used technique for predicting vertex geometries via a...
Lossless geometry compression for steady-state and time-varying irregular grids (2005)
Tetrahedral Meshes, Dan Chen, Yi-jen Chiang, Nasir Memon, Xiaolin Wu
In recent years, new challenges for scientific visualization have emerged as the size of data generated from simulations has grown exponentially. The emerging demand for efficiently storing,...
Authentication Using Graphical Passwords: Effects of Tolerance and Image Choice (2005)
Susan Wiedenbeck, Jim Waters, Alex Brodskiy, Nasir Memon
Graphical passwords are an alternative to alphanumeric passwords in which users click on images to authenticate themselves rather than type alphanumeric strings. We have developed one such system,...
Perceptual Audio Hashing Functions (2005)
Hamza Özer, Bülent Sankur, Nasir Memon, Emin Anarım
Perceptual hash functions provide a tool for fast and reliable identification of content. We present new audio hash functions based on summarization of the time-frequency spectral characteristics of...
Image Steganalysis with Binary Similarity Measures (2005)
İsmail Avcıbaş, Mehdi Kharrazi, Nasir Memon, Bülent Sankur
We present a novel technique for steganalysis of images that have been subjected to embedding by steganographic algorithms. The seventh and eighth bit planes in an image are used for the computation...
Robust Discretization, With an Application to Graphical Passwords (2004)
Jean-Camille Birget, Dawei Hong, Nasir Memon
When data or the processing on the data have some uncertainty, discretization of those data can lead to signicantly dierent output. For example, in certain graphical password schemes, a slight...
Time Series Analysis And Segmentation Using Eigenvectors For Mining (2004)
Semantic Audio Label, Regunathan Radhakrishnan, Ziyou Xiong, Ajay Divakaran, Nasir Memon
Pattern discovery from video has promising applications in summarizing different genre types including surveillance and sports. After pattern discovery, a summary of the video can be constructed from...
A classifier design for detecting image manipulations (2004)
İsmail Avcıbaş, Sevinç Bayram, Nasir Memon, Bülent Sankur, Mahalingam Ramkumar
In this paper we present a framework for digital image forensics. Based on the assumptions that some processing operations must be done on the image before it is doctored, and an expected measurable...
Quantitative steganalysis of binary images (2004)
Ming Jiang, Nasir Memon, Edward Wong
We propose a quantitative steganalysis method to detect hidden information embedded by flipping pixels along boundaries in binary images. We model steganographic embedding as an additive noise...
A classifier design for detecting image manipulations (2004)
Ismail Avcibas, Sevinc Bayram, Nasir Memon, Mahalingam Ramkumar, Bulent Sankur
In this paper we present a framework for digital image forensics. Based on the assumptions that some processing operations must be done on the image before it is doctored, and an expected measurable...
Automated Reassembly of Fragmented Images (2003)
Abrata Pal, Kulesh Shanmugasundaram, Nasir Memon
In this paper we address the problem of reassembly of images from a collection of their fragments. The image reassembly problem is formulated as a combinatorial optimization problem and image...
ForNet: A Distributed Forensics Network (2003)
Kulesh Shanmugasundaram, Nasir Memon, Anubhav Savant, Herve Brönnimann
This paper introduces ForNet, a distributed network logging mechanism to aid digital forensics over wide area networks. We describe the need for such a system, review related work, present the...
Dan Chen, Yi-Jen Chiang, Nasir Memon, Xiaolin Wu
Practical applications that employ entropy coding for large alphabets often partition the alphabet set into two or more layers and encode each symbol by using some suitable pre x coding for each...
Dan Chen, Yi-jen Chiang, Nasir Memon, Xiaolin Wu
Practical applications that employ entropy coding for large alphabets often partition the alphabet set into two or more layers and encode each symbol by using some suitable prefix coding for each...
Dan Chen, Yi-jen Chiang, Nasir Memon, Xiaolin Wu
Practical applications that employ entropy coding for large alphabets of-ten partition the alphabet set into two or more layers and encode each symbol by using some suitable prefix coding for each...
Obfuscation of design intent in object-oriented applications (2003)
Mikhail Sosonkin, Gleb Naumovich, Nasir Memon
Protection of digital data from unauthorized access is of paramount importance. In the past several years, much research has concentrated on protecting data from the standpoint of confidentiality,...
A progressive Lossless/Near-Lossless image compression algorithm (2002)
Ismail Avcıbas, Nasir Memon, Bülent Sankur, Senior Member, Khalid Sayood
Abstract—A novel image compression technique is presented that incorporates progressive transmission and near-lossless compression in a single framework. Experimental performance of the proposed...
Cluster-based delta compression of a collection of files (2002)
Zan Ouyang, Zan Ouyang, Nasir Memon, Nasir Memon, Torsten Suel, Torsten Suel, ...
Delta compression techniques are commonly used to succinctly represent an updated version of a file with respect to an earlier one. In this paper, we study the use of delta compression in a somewhat...
zdelta: An efficient delta compression tool (2002)
Dimitre Trendafilov, Dimitre Trendafilov, Nasir Memon, Nasir Memon, Torsten Suel, Torsten Suel
In this report we describe a tool for delta compression, i.e., the efficient encoding of a given data set in relation to another one. Its possible applications include archiving multiple versions of...
Cluster-based delta compression of a collection of files (2002)
Zan Ouyang, Nasir Memon, Torsten Suel, Dimitre Trendafilov
Delta compression techniques are commonly used to succinctly represent an updated version of a file with respect to an earlier one. In this paper, we study the use of delta compression in a somewhat...
Algorithms for delta compression and remote file synchronization (2002)
Delta compression and remote file synchronization techniques are concerned with efficient file transfer over a slow communication link in the case where the receiving party already has a similar file...
Data Masking: A Secure-Covert Channel Paradigm (2002)
Regunathan Radhakrishnan Kulesh, Regunathan Radhakrishnan, Kulesh Shanmugasundaram, Nasir Memon
It is well known that encryption provides secure channels for communicating entities. However, due to lack of covertness on these channels, an eavesdropper can identify encrypted streams through...
Cluster-based delta compression of a collection of files (2002)
Zan Ouyang, Zan Ouyang, Nasir Memon, Nasir Memon, Torsten Suel, Torsten Suel, ...
Delta compression techniques are commonly used to succinctly represent an updated version of a file with respect to an earlier one. In this paper, we study the use of delta compression in a somewhat...
On steganalysis of random lsb embedding in continuous-tone images (2002)
Sorina Dumitrescu, Xiaolin Wu, Nasir Memon
Abstract – In this paper we present an LSB steganalysis technique that can detect the existence of hidden messages that are randomly embedded in the least significant bits of natural...
A progressive Lossless/Near-Lossless image compression algorithm (2002)
İsmail Avcıbaş, Nasir Memon, Bülent Sankur A, Khalid Sayood B
We present a technique that provides progressive transmission and near-lossless compression in one single framework. The proposed technique produces a bitstream that results in progressive...
Image Quality Statistics and their Use in Steganalysis and Compression (2001)
İsmail Avcıbaş, Prof Bülent Sankur, Lale Akarun, Prof Emin Anarim, Nasir Memon, Assoc Prof, ...
ii
Steganalysis using image quality metrics (2001)
Ismail Avcıbas, Nasir Memon, Bülent Sankur
Abstract—We present techniques for steganalysis of images that have been potentially subjected to steganographic algorithms, both within the passive warden and active warden frameworks. Our...
Protocols for Watermark Verification (2001)
K. Gopalakrishnan, Nasir Memon, Poorvi Vora
Digital watermarks have recently been proposed for the purpose of copy deterrence of multimedia content. Copy deterrence using digital watermarks is achieved by inserting a unique watermark into each...
Recent developments in document image watermarking and data hiding (2001)
Minya Chen, Edward K. Wong, Nasir Memon, Scott Adams
With the proliferation of digital media such as images, audio, and video, robust digital watermarking and data hiding techniques are needed for copyright protection, copy control, annotation, and...
An Analysis of Some Common Scanning Techniques For Lossless Image Coding (2000)
Nasir Memon, David Neuhoff, Sunil Shende
this paper, we analyze the performance of contextbased lossless image coding techniques in conjunction with the Hilbert and raster scans. Our analysis shows that, under certain reasonable...
How Many Pixels To Watermark? (2000)
Watermark design and detection have been studied as two separate problems so far. However, we show that, if the watermarking algorithm is based on the watermark detection method, then significant...
An Analysis of Some Common Scanning Techniques For Lossless Image Coding (2000)
Nasir Memon, David Neuhoff, Sunil Shende
this paper, we analyze the performance of contextbased lossless image coding techniques in conjunction with the Hilbert and raster scans. Our analysis shows that, under certain reasonable...
Steganalysis of Digital Watermarking Techniques (1998)
Memon, Nasir, Fridrich, Jessica
The objective of this project was to develop steganalysis techniques for images that have been potentially subjected to a watermarking algorithm. Our effort was directed towards two separate research...
Can Invisible Watermarks Resolve Rightful Ownerships? (1996)
Scott Craver, Nasir Memon, Boon-lock Yeo, Minerva Yeung
Digital watermarks have been proposed in recent literature as the means for copyright protection of multimedia data. In this paper we address the capability of invisible watermarking schemes to...
A context-based, adaptive, lossless/nearly-lossless coding scheme for continuous-tone images (1995)
Xiaolin Wu, Nasir Memon, Khalid Sayood
We propose a context-based, adaptive, predictive coding system for lossless/nearly-lossless compression of continuous-tone images. The system provides better compression than other lossless image...
Protecting Digital Media Content (0000)
The article reports that due to the proliferation of the World-Wide Web, a huge amount of multimedia content text, graphics, images, video, and audio are available for browsing and downloading by...
Protecting Digital Media Content
The article reports that due to the proliferation of the World-Wide Web, a huge amount of multimedia content text, graphics, images, video, and audio are available for browsing and downloading by...
Daniel Tretter, Nasir Memon, Charles A. Bouman
Multispectral images are a particular class of images that require specialized coding algorithms. In multispectral images, the same spatial region is captured multiple times using different imaging...