Abstract: Data hiding is an emerging research field since the internet is utilized today for data communication but is insufficiently safe to communicate highly sensitive information. Data is embedded into digital media as part of the data hiding process for security. In some specialized applications such as medical, military, and legal, even slight distortions in digital images can cause false alarms. Reversible Data Hiding (RDH) is the process which allows the original data to be recovered fully with no loss of information, and is thus an active research direction in this area. Different RDH techniques are widely used from image recognition to medical image processing to vector reconstruction in CAD. In this paper several reversible data hiding techniques are reviewed. Different techniques like Block Prechecking, Difference based Fibonacci Transform, Block-Wise Histogram Shifting, Code Division Multiplexing, Progressive Recovery, Distributed Source Encoding, Histogram Modification and MSBs Integration, block-wise multi-predictor were reviewed in this paper. The results of different reversible data hiding techniques are analysed by using the previous methods.

Reversible Data Hiding (RDH), Data Extraction, Data Embedding Encryption, Stream Cipher.