Survey on Reversible Data Hiding Techniques

Data transmissions using computer networks has created the need for security. Many robust message encryption techniques have been developed to supply this demand. Steganography is one form of cryptography where we hide data within large texts or images. Reversible data hiding can be considered as a form of steganography in which we hide data within images, but with a variation that, in reversible data hiding the original cover can be recovered losslessly after the embedded messages are extracted. This paper presents a detailed survey on various techniques available for RDH. The techniques include Histogram shifting, LSB modification method, Difference Expansion, Interpolation Technique.