1 Introduction.- 1.1 Overview of Multimedia Data Hiding.- 1.2 Book Organization.- I Fundamental Issues.- 2 Preliminaries.- 3 Basic Embedding Mechanisms.- 4 Handling Uneven Embedding Capacity.- II Algorithm and System Designs.- 5 Data Hiding in Binary Image.- 6 Multilevel Data Hiding for Image and Video.- 7 Data Hiding for Image Authentication.- 8 Data Hiding for Video Communications.- III Attacks and Countermeasures.- 9 Attacks on Known Data Hiding Algorithms.- 10 Attacks on Unknown Data Hiding Algorithms.- 11 Conclusions and Perspectives.- References.- About the Authors.