Information Hiding : Third International Workshop IH’99 Dresden Germany September 29 October 1 1999 Proceedings This book constitutes the thoroughly refereed post workshop proceedings of the Third International Workshop on Information Hiding IH99 held in Dresden Germany in September October 1999. The 33 revised full papers presented were carefully reviewed and selected from a total of 68 submissions. The dominating topic dealt with in various contexts is watermarking. The papers are organized in sections on fundamentals of steganography paradigms and examples beyond symmetric steganography; watermarking: proving ownership detection and decoding embedding techniques new designs and applications improving robustness software protection; separating private and public information; and stego engineering