Constitutes the refereed post-proceedings of the 7th International Workshop on Information Hiding, IH 2005, held in Barcelona, Spain in June 2005. This book features the papers that are organized in topical sections on anonymity, watermarking, theory, watermark attacks, steganography, hiding in unusual content, steganalysis, and fingerprinting.

Invited Talk.- On Joint Coding for Watermarking and Encryption.- Anonymity.- Compulsion Resistant Anonymous Communications.- Provable Anonymity for Networks of Mixes.- On Blending Attacks for Mixes with Memory.- Pervasive Random Beacon in the Internet for Covert Coordination.- Censorship Resistance Revisited.- Watermarking.- Optimal Embedding for Watermarking in Discrete Data Spaces.- A Spread Spectrum Watermarking Scheme Based on Periodic Clock Changes for Digital Images.- A Quantization Watermarking Technique Robust to Linear and Non-linear Valumetric Distortions Using a Fractal Set of Floating Quantizers.- Theory.- Efficient Steganography with Provable Security Guarantees.- Information-Theoretic Analysis of Security in Side-Informed Data Hiding.- Fundamentals of Data Hiding Security and Their Application to Spread-Spectrum Analysis.- Watermark Attacks.- How to Combat Block Replacement Attacks?.- On the Intractability of Inverting Geometric Distortions in Watermarking Schemes.- Steganography.- Pre-processing for Adding Noise Steganography.- Efficient Wet Paper Codes.- Hiding in Unusual Content.- Translation-Based Steganography.- ID Modulation: Embedding Sensor Data in an RFID Timeseries.- Embedding Covert Channels into TCP/IP.- Steganalysis.- Steganalysis Based on Multiple Features Formed by Statistical Moments of Wavelet Characteristic Functions.- Assessment of Steganalytic Methods Using Multiple Regression Models.- A General Framework for Structural Steganalysis of LSB Replacement.- New Steganalysis Methodology: LR Cube Analysis for the Detection of LSB Steganography.- An Analysis of Empirical PMF Based Tests for Least Significant Bit Image Steganography.- Software Watermarking.- Self-validating Branch-Based Software Watermarking.- Data Hiding in Compiled Program Binaries for Enhancing Computer System Performance.- Dither Modulation Watermarking of Dynamic Memory Traces.- Fingerprinting.- A Family of Collusion 2-Secure Codes.- Best Security Index for Digital Fingerprinting.

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