Survey of Recent Reversible Data Hiding Schemes.

A B S T R A C T Steganography is the science that involves communicating secret data in an appropriate multimedia carrier, e.g., image, audio, and video files. It comes under the assumption that if the feature is visible, the point of attack is evident, thus the goal here is always to conceal the very existence of the embedded data. Watermarking is one of the promising solutions for tamper detection and protection of digital content. However, watermarking can cause damage to the sensitive information present in the cover work. Therefore, at the receiving end, the exact recovery of cover work may not be possible. Additionally, there exist certain applications that may not tolerate even small distortions in cover work prior to the downstream processing. In such applications, reversible data hiding instead of conventional watermarking is employed. Reversible data hiding of digital content allows full extraction of the secret data along with the complete restoration of the cover work. Due to the rapid evolution of reversible data hiding techniques, a latest review of recent research in this field is highly desirable.