Session 1 - Digital Media Watermarking Session Chair: Lisa Marvel (University of Delaware) -- An Implementation of, and Attacks on, Zero-Knowledge Watermarking -- On the Possibility of Non-invertible Watermarking Schemes -- Reversing Global and Local Geometrical Distortions in Image Watermarking -- On Achievable Regions of Public Multiple-Access Gaussian Watermarking Systems -- Fixed-Distortion Orthogonal Dirty Paper Coding for Perceptual Still Image Watermarking -- Session 2 - Steganalysis Session Chair: Mauro Barni (University of Siena) -- Feature-Based Steganalysis for JPEG Images and Its Implications for Future Design of Steganographic Schemes -- Exploiting Preserved Statistics for Steganalysis -- Improved Detection of LSB Steganography in Grayscale Images -- An Improved Sample Pairs Method for Detection of LSB Embedding -- Session 3 - Forensic Applications Session Chair: Scott Craver (Princeton University) -- Statistical Tools for Digital Forensics -- Relative Generic Computational Forensic Techniques -- Session 4 - Steganography Session Chair: Andreas Westfeld (Dresden University of Technology) -- Syntax and Semantics-Preserving Application-Layer Protocol Steganography -- A Method of Linguistic Steganography Based on Collocationally-Verified Synonymy -- Session 5 - Software Watermarking Session Chair: John McHugh (SEI/CERT) -- Graph Theoretic Software Watermarks: Implementation, Analysis, and Attacks -- Threading Software Watermarks -- Soft IP Protection: Watermarking HDL Codes -- Session 6 - Security and Privacy Session Chair: Ross Anderson (University of Cambridge) -- An Asymmetric Security Mechanism for Navigation Signals -- Analysis of COT-based Fingerprinting Schemes: New Approach to Design Practical and Secure Fingerprinting Scheme -- Empirical and Theoretical Evaluation of Active Probing Attacks and Their Countermeasures -- Optimization and Evaluation of Randomized c-Secure CRT Code Defined on Polynomial Ring -- Session 7 - Anonymity Session Chair: Andreas Pfitzmann (Dresden University of Technology) -- Statistical Disclosure or Intersection Attacks on Anonymity Systems -- Reasoning About the Anonymity Provided by Pool Mixes That Generate Dummy Traffic -- The Hitting Set Attack on Anonymity Protocols -- Session 8 - Data Hiding in Unusual Content Session Chair: Christian Collberg (University of Arizona) -- Information Hiding in Finite State Machine -- Covert Channels for Collusion in Online Computer Games.

It is an honor and great pleasure to write a preface for this postproceedings of the 6th International Workshop on Information Hiding. In the past 10 years, the field of data hiding has been maturing and expanding, gradually establishing its place as an active interdisciplinary research area uniquely combining information theory, cryptology, and signal processing. This year, the workshop was followed by the Privacy Enhancing Technologies workshop (PET) hosted at the same location. Delegates viewed this connection as fruitful as it gave both communities a convenient opportunity to interact. We would like to thank all authors who submitted their work for consideration. Out of the 70 submisions received by the program committee, 25 papers were accepted for publication based on their novelty, originality, and scientific merit. We strived to achieve a balanced exposition of papers that would represent many different aspects of information hiding. All papers were divided into eight sessions: digital media watermarking, steganalysis, digital forensics, steganography, software watermarking, security and privacy, anonymity, and data hiding in unusual content. This year, the workshop included a one-hour rump session that offered an opportunity to the delegates to share their work in progress and other brief but interesting contributions.