Novel Spatial and Transform Domain Image Encryption Algorithms
Professor & HOD, Dept. of CSE & IT, Sri Padmavati Mahila Viswa Vidhyalayam, Tirupati, T. Sudha, Balasubramani Suresh Gopi · IOSR Journal of VLSI and Signal processing · 2014
Image encryption has been crucial for many applications where the secret image consisting of secrete information regarding an application will be embedded in another data preferably image.New technology and new applications bring threat to the information.To provide security to the information with respect to new threats, new algorithms need to be devised.In this paper three techniques for image encryption are proposed.In the first, the secret image will be embedded into least significant bit position of another image called carrier or source image.But the order with which the insertion takes place will be decided by a polynomial, somehow similar to the hash table insertion.In the second, the secret image is hidden in the decomposed data of multimedia data.The first technique is a spatial domain technique, whereas the second is a transform domain technique.In the third, the secret image will be split into share images.The share images will be hidden in another image.By using the above techniques different levels of security is provided to the information.