This book constitutes the refereed proceedings of the 6th International Workshop, IWDW 2007, held in Guangzhou, China, in December 2007. The 24 revised full papers together with 3 invited papers were carefully reviewed and selected from 81 submissions. The papers are organized in topical sections on watermark security;

Invited Lecture.- Watermarking, a Mature Technology – Retrospect and Prospect.- The Marriage of Cryptography and Watermarking — Beneficial and Challenging for Secure Watermarking and Detection.- Detecting Photographic Composites of People.- Session I: Watermark Security.- (In)Security of an Efficient Fingerprinting Scheme with Symmetric and Commutative Encryption of IWDW 2005.- Attack Analysis for He & Wu’s Joint Watermarking/Fingerprinting Scheme.- Multiple Watermarking in Visual Cryptography.- Scalable Security and Conditional Access Control for Multiple Regions of Interest in Scalable Video Coding.- Session II: Steganalysis.- Fusion Based Blind Image Steganalysis by Boosting Feature Selection.- Steganalysis of Multi Bit Plane Image Steganography.- Steganalysis of Enhanced BPCS Steganography Using the Hilbert-Huang Transform Based Sequential Analysis.- Weaknesses of MB2.- Effect of Different Coding Patterns on Compressed Frequency Domain Based Universal JPEG Steganalysis.- Steganalysis Versus Splicing Detection.- Session III: Authentication.- Authenticating Binary Text Documents Using a Localising OMAC Watermark Robust to Printing and Scanning.- A General Data Hiding Framework and Multi-level Signature for Binary Images.- High-Capacity Invisible Background Encoding for Digital Authentication of Hardcopy Documents.- Session IV: Reversible Data Hiding.- Reversible Quantization-Index Modulation Using Neighboring Correlation.- High Capacity Reversible Data Hiding for 3D Meshes in the PVQ Domain.- Reversible Data Hiding Using Prediction Error Values Embedding.- An Improved Reversible Difference Expansion Watermarking Algorithm.- Optimum Histogram Pair Based Image Lossless Data Embedding.- Session V: Robust Watermarking.- Multiple Domain Watermarking for Print-Scanand JPEG Resilient Data Hiding.- GA-Based Robustness Evaluation Method for Digital Image Watermarking.- Dither Modulation in the Logarithmic Domain.- Session VI: Poster Session.- A Practical Real-Time Video Watermarking Scheme Robust against Downscaling Attack.- Secure Video Multicast Based on Desynchronized Fingerprint and Partial Encryption.- Design an Aperiodic Stochastic Resonance Signal Processor for Digital Watermarking.- Watermarking for Authentication of LZ-77 Compressed Documents.- Robust Audio Zero-Watermark Based on LWT and Chaotic Modulation.- A Modified Kernels-Alternated Error Diffusion Watermarking Algorithm for Halftone Images.- Session VII: Theory and Methods in Watermarking.- On the Complexity of Obtaining Optimal Watermarking Schemes.- A Theoretical Framework for Watermarking of Compressed Signals.- Least Distortion Halftone Image Data Hiding Watermarking by Optimizing an Iterative Linear Gain Control Model.- Multiple Scrambling and Adaptive Synchronization for Audio Watermarking.- A Comparison of DCT and DWT Block Based Watermarking on Medical Image Quality.- A High Payload VQ Steganographic Method for Binary Images.

This book constitutes the refereed proceedings of the 6th International Workshop, IWDW 2007, held in Guangzhou, China, in December 2007. The 24 revised full papers together with 3 invited papers were carefully reviewed and selected from 81 submissions. The papers are organized in topical sections on watermark security; steganalysis; authentication; reversible data hiding; robust watermarking; poster session; theory and methods in watermarking.