A Survey on Efficient ETC (Encryption-Then-Compression) Techniques for Image Data Security

As of now, many image encryption and compression techniques have been emerged to provide security to the data in the images, but still image encryption is to be carried out prior to the image compression. This creates a problem of how to synchronize both these operations so that compression of the Encrypted images is done with maximum efficiency. In this paper we analyze various techniques emerged for Encryption then Compression process and ultimately design a new and efficient technique that provides maximum efficiency in terms of encryption as well as in terms of compression.