A Review on Reversible Data Hiding Techniques

摘要

Data hiding is an art, which involves the technique of carrying a data in a suitable multimedia carrier for secure communication. Data hiding techniques provide secret communication and authentication but can cause a loss of the carrier. These techniques are used for copyright protection, media registration, integrity authentication etc. Applications like medical imagery, military and forensics degradation do not allow distortion of original cover. So it needs secure data hiding techniques. To overcome this disadvantage of extracting the carrier with distortion was removed by reversible data hiding methods. Reversible data hiding techniques recovers the original carrier exactly after the extraction of the secret encrypted data. Reversible Data Hiding Techniques are classified based on the method of implementation. In this paper a survey on the different techniques applicable based on difference expansion, histogram shifting and compression embedding, for reversible data hiding are discussed.