Data Embedding for Covert Communications, Digital Watermarking, and Information Augmentation

摘要

This paper introduces data embedding schemes for covert communications, information augmentation, and digital watermarking. Although most digital objects may be used as a container for embedded data, this paper focuses on digital images. It discusses the data embedding framework -- the assumptions made on the communication channel, the issues considered for implementation, and the general requirements imposed on data embedding techniques. The paper presents a number of spatial and spectral data embedding techniques and touches on the general limitations these techniques face. Several application scenarios are presented and the manner in which the data embedding framework is typically tailored and applied to them is proposed.