Data security and data integrity are the two challenging areas for research. So many research is progressing on the field like internet security. The requirement of secure transmission of data is important in our life. The transmission should be more secure when channel/network is too noisy/fraudulent. Image transmission is one of the application that must be securely transmitted over the fraudulence network. Secure transmission of image is required in various fields like medical/telemedicine, military etc. When it is desired to send the confidential important secure data over an insecure and bandwidth-constrained channel it is customary to encrypt as well as compress the cover data and then embed the confidential/important/secure data into that cover data. For achieving this facility there are various data hiding techniques, compression techniques, encryption/ decryption techniques available. Here is a review on different data hiding techniques in encrypted image.

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Digital Images Reversible Data Hiding Separable Reversible Data Hiding.