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IEEE 10th International Conference on Signal Processing

作者： Cheng, Geping Ling, Hefei Zou, Fuhao Li, Ping Huazhong Univ Sci & Technol Sch Comp Sci & Technol Wuhan 430074 Hubei Peoples R China

ISBN: (纸本)9781424458981

Digital fingerprinting is a technique by embedding a unique identifying signal which corresponds to the user's identity in each legally distributed copy. A digital fingerprinting system may suffer from, the collusion attacks from a group of users. quantization index modulation (QIM) is an important embedding technique. In QIM, quantization step size has a marked influence on the detection performance of fingerprinting system. Higher the value of quantization step size is, worse the detection performance is. Therefore, we propose an improved QIM based fingerprinting scheme by adding a random dither signal to the host signal to enhance the collusion resistance of fingerprinting system. Simulation results show that the improved fingerprinting system has better collusion resistance than traditional QIM based fingerprinting system.

关键词： Digital fingerprinting Gaussian fingerprints quantization index modulation collusion resistance

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STATISTICAL MODELING OF FOOTPRINTS OF QIM STEGANOGRAPHY

STATISTICAL MODELING OF FOOTPRINTS OF QIM STEGANOGRAPHY

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International Conference on Multimedia and Expo

作者： Malik, Hafiz Univ Michigan Informat Syst Secur & Forens Lab Dept Elect & Comp Engn Dearborn MI 48128 USA

ISBN: (纸本)9781424474936

In this paper, a new model is proposed to characterize distortion due to message embedding. The proposed statistical model is used to develop a parametric steganalysis technique to attack quantization index modulation (QIM) steganography. We have shown that quantization with message embedding (a.k.a. QIM) introduces relatively stronger disturbance in the local-correlation in the test-image than quantization without message embedding. Presented steganalysis technique exploits rich spatial/temporal correlation in the natural images to estimate local-randomness in the test-image. The local-randomness estimated from the test-image is modeled using generalized Gamma distribution (GGD). A binary hypothesis test, based on generalized likelihood ratio test (GLRT), is used to detect the QIM-stego image. Simulation results show that the proposed method can successfully distinguish between the quantized-cover and the QIM-stego with very low false alarm rates.

关键词： quantization index modulation Steganography Steganalysis Generalized Gamma Distribution Parameter Estimation

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Image Watermarking Algorithms with Synchronization mechanism using Self-synchronization decoding and Feature Points

Image Watermarking Algorithms with Synchronization mechanism...

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7th IEEE Electronics, Robotics and Automotive Mechanics Conference (CERMA)

作者： Takahara, Keita Yamaguchi, Kazuhiko Nakano-Miyatake, Mariko Perez-Meana, Hector Univ Electrocommun Dept Informat Commun Engn Chofu Tokyo Japan Natl Polytech Inst ESIME Culhuacan Postgrad & Res Sect Mexico City DF Mexico

ISBN: (纸本)9780769542041

In this paper we propose two image watermarking algorithms, which are robust to cropping operation using self-synchronization mechanism. In both algorithms, the watermark sequence is firstly encoded by non-cyclic Low Density Parity Check Codes (LDPC) and then it is embedded into the block-wised Discrete Cosine Transform (DCT) coefficients using the quantization index modulation (QIM) algorithm. In the watermark extraction process, the first algorithm extracts the watermark sequence using self-synchronization of sum-product decoding. While the second one firstly extracts some synchronization code embedded previously in the regions centered by feature points of the image, and using them block segmentation starting position can be calculated. The desirable performance of both algorithms about the watermark imperceptibility and robustness against cropping attack with different cropping rate is shown, together with computer complexity.

关键词： Low Density Parity Check Codes watermarking sun-product decoding quantization index modulation

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quantization BASED DATA HIDING STRATEGIES WITH VISUAL APPLICATIONS

QUANTIZATION BASED DATA HIDING STRATEGIES WITH VISUAL APPLIC...

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作者： ERSİN ESEN Middle East Technical University

学位级别：博士

The first explored area in this thesis is the proposed data hiding method, TCQ-IS. The method is based on Trellis Coded quantization (TCQ), whose initial state selection is arbitrary. TCQ-IS exploits this fact to hide data. It is a practical multi-dimensional that eliminates the prohibitive task of designing high dimensional quantizers. The strength and weaknesses of the method are stated by various experiments. The second contribution is the proposed data hiding method, Forbidden Zone Data Hiding (FZDH), which relies on the concept of ―forbidden zone‖, where host signal is not altered. The main motive of FZDH is to introduce distortion as much as needed, while keeping a range of host signal intact depending on the desired level of robustness. FZDH is compared against quantization index modulation (QIM) as well as DC-QIM and ST- QIM. FZDH outperforms QIM even in 1-D and DC-QIM in higher dimensions. Furthermore, FZDH is comparable with ST-QIM for certain operation regimes. The final contribution is the video data hiding framework that includes FZDH, selective embedding and Repeat Accumulate (RA) codes. De-synchronization due to selective embedding is handled with RA codes. By means of simple rules applied to the embedded frame markers, certain level of robustness against temporal attacks is introduced. Selected coefficients are used to embed message bits by employing multi-dimensional FZDH. The framework is tested with typical broadcast material against common video processing attacks. The results indicate that the framework can be utilized in real life applications.

关键词： Data hiding watermarking quantization index modulation Distortion Compensation Scalar Costa Scheme Forbidden Zone Data Hiding selective embedding

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Multibit QIM Watermarking Using M-ary modulation and Lifting

Multibit QIM Watermarking Using M-ary Modulation and Lifting

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International Conference on Signal Processing and Communications

作者： Phadikar, Amit Maity, Santi P. MCKV Inst Engn Dept Informat Technol Liluah 711204 Howrah India Bengal Engn & Sci Univ Dept Informat Technol Howrah 711103 India

ISBN: (纸本)9781424471379

quantization index modulation (QIM) principle has shown superior performance in digital watermarking over spread-spectrum and low-bit(s) modulation based methods. In QIM based data hiding scheme, it is a challenging task to embed multiple bits of information into the same set of host signal samples. This work attempts to employ M-ary modulation for multibit QIM watermarking. The watermark embedding process may be divided into two phases. In the first phase, a binary watermark image is spatially dispersed using sequence of number generated by a secret key. In the second phase, host image is decomposed by integer wavelets and the encoded watermark bits are embedded into high-low (HL) and low-high (LH) subbands of DWT-coefficients using M-ary modulation. M-ary modulation is accomplished using near-orthogonal dither generated from the combination of random key, Hadamard matrix and step size. Simulation results show that robustness is increased, at the cost of increase in decoding complexity for high M-value.

关键词： DWT-coefficients Hadamard matrix M-ary modulation QIM based data hiding scheme binary watermark image data encapsulation decoding complexity digital watermarking encoded watermark bits host image host signal samples integer wavelets low-bit modulation based methods modulation multibit QIM watermarking near-orthogonal dither quantisation (signal) quantization index modulation random key secret key spread-spectrum step size watermark embedding process watermarking wavelet transforms

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Comparative Study of Wavelet Based Lattice QIM Techniques and Robustness against AWGN and JPEG Attacks

Comparative Study of Wavelet Based Lattice QIM Techniques an...

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8th International Workshop on Digital Watermarking

作者： Bardyn, Dieter Dooms, Ann Dams, Tim Schelkens, Peter VUB Interdisciplinary Inst Broadband Technol IBBT Dept Elect & Informat ETRO B-1050 Brussels Belgium

ISBN: (纸本)9783642036873

We study watermarking techniques based on quantization index modulation for which sets of lattice quantizers Q(m) are used (LQIM). A recipe for constructing such quantizers Q(m) is proposed, where the size of these sets is variable, so that the payload is easily adaptable. We make a comparative study of 8 dimensional lattices with good quantizer properties, where the embedding is done in the wavelet domain. Along the way, the gap between the theoretical ideas behind QIM and practical systems using lattices is closed by extending techniques, such as dithered quantizers and distortion compensation, from the scalar case to LQIM.

关键词： Digital Watermarking quantization index modulation Lattice

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QIM-DM WATERMARKING OPTIMIZATION BASED ON INTER-FREQUENCY CONTRAST MASKING IN THE DCT DOMAIN

QIM-DM WATERMARKING OPTIMIZATION BASED ON INTER-FREQUENCY CO...

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1st IEEE International Workshop on Information Forensics and Security

作者： Battisti, Federica Carli, Marco Neri, Alessandro Univ Roma TRE Dept Appl Elect I-00146 Rome Italy

ISBN: (纸本)9781424452798

In this paper a watermarking scheme based on the Human Visual System (HVS) is presented. A quantization index modulation - Dither modulation scheme is used in the Discrete Cosine Transform domain for the embedding. The watermark quantization step is selected according to the inter-frequency masking effect computed by using a HVS-inspired objective image quality metric. Experimental results demonstrate the effectiveness and the robustness of the proposed solution.

关键词： Digital watermarking perceptual quality metrics quantization index modulation PSNR-HVS

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SECURE AND HVS-ADAPTIVE EXHIBITION SPREAD TRANSFORM DITHER modulation WATERMARKING FOR DIGITAL CINEMA

SECURE AND HVS-ADAPTIVE EXHIBITION SPREAD TRANSFORM DITHER M...

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1st IEEE International Workshop on Information Forensics and Security

作者： Darazi, Rony Callau, Pilar Macq, Benoit Catholic Univ Louvain Commun & Remote Sensing Lab B-1348 Louvain Belgium

ISBN: (纸本)9781424452798

In this paper, we propose a secure watermarking scheme based on Spread Transform Dither modulation (STDM) method for Digital Cinema. The embedding is performed in the JPEG2000 decoding pipeline after the de-quantization and prior to the inverse discrete wavelet transform (IDWT). We exploit the wavelet properties related to the Human Visual System (HVS) in order to have a trade-off between Fidelity and Robustness, while preserving Security. We design a pixel-wise masking vector that modulates the spreading vector in such a way that preserves its security. Our results show that the proposed method is robust against traditional image processing attacks. The proposed scheme can also survive the camecording attack, a pre-processing step is done in the detection for this end.

关键词： Exhibition Watermark quantization index modulation Perceptual Masking JPEG2000 Digital Cinema

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A Novel Adaptive Watermarking Scheme Based on Human Visual System and Particle Swarm Optimization

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5th International Conference on Information Security Practice and Experience

作者： Zhu, Shaomin Liu, Jianming China Elect Power Res Inst Beijing 100192 Peoples R China State Grid Informat & Teclecomm Co Ltd Beijing 100761 Peoples R China

ISBN: (纸本)9783642008429

In this paper, we proposed a novel watermarking scheme based on adaptive quantization index modulation and singular value decomposition in the hybrid discrete wavelet transform (DWT) and discrete cosine transform (DCT). The secret watermark bits are embedded on the singular values vector of blocks within low frequency subband in host image hybrid DWT-DCT domain. To embed watermark imperceptibly, robustly and securely, we model the adaptive quantization steps by utilizing human visual system (HVS) characteristics and particle swarm optimization (PSO) algorithm. Experimental results demonstrate that the proposed scheme is robust to variety of image processing attacks. In the proposed algorithm the quantized embedding strategy is adopted, so no host image is needed for blind extraction of watermarking image.

关键词： quantization index modulation singular value decomposition human visual system particle swarm optimization blind extraction

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Security of Lattice-Based Data Hiding Against the Watermarked-Only Attack

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IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY 2008年第4期3卷 593-610页

作者： Perez-Freire, Luis Perez-Gonzalez, Fernando Univ Vigo ETSI Telecommun Signal Theory & Commun Dept Vigo 36310 Spain

This paper presents a security analysis for data-hiding methods based on nested lattice codes, extending the analysis provided by previous works to a more general scenario. The security is quantified as the difficulty of estimating the secret key used in the embedding process, assuming that the attacker has several signals watermarked available with the same secret key. The theoretical analysis accomplished in the first part of this paper quantifies security in an information-theoretic sense by means of the mutual information between the watermarked signals and the secret key, addressing important issues, such as the possibility of achieving perfect secrecy and the impact of the embedding rate in the security level. In the second part, a practical algorithm for estimating the secret key is proposed, and the information extracted is used for implementing a reversibility attack on real images.

关键词： Equivocation lattice data hiding mutual information nested lattice codes perfect secrecy quantization index modulation set-membership estimation tree search watermarking security

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