Digital watermarking: an introduction -- Digital watermarking schemes for multimedia authentication -- Digital watermarking for multimedia transaction tracking -- A new public-key algorithm for watermarking of digital images -- Geometric distortions correction using image moment in image watermarking -- Audio watermarking: requirements, algorithms, and benchmarking -- MPEG standards and watermarking technologies -- Time-variant watermarks for digital videos: an MPEG-based approach -- Active watermarking system: protection of digital media.