Encryption based Image Authentication Technique using Random Circular Insertion and Adjustment (EIATRCIA)

Abstract

This paper demonstrates a dynamic encryption based image authentication technique in the spatial domain that hides one authenticating color image inside another carrier color image where the authenticated receiver can only extract this embedded secrete image using the secrete key(s). The EIATRCIA technique actually embeds the secrete image bits into the randomly generated bit positions of each carrier image pixel bytes using the encryption with dynamic secrete key(s). The embedding of four numbers of the secrete image bits into the sub-image blocks of size 2×2 can also be organized in a randomly generated circular list involving encryption associating secrete key(s) and stenographic key. Finally a delicate readjustment in the respective bits of the concerned bit-embedded pixel bytes can minimize the introduced distortion as well. This carrier image after embedding also avoids the visual distortion and the experimental result shows the robustness along with performance of this scheme while embedding. © 2013 Springer-Verlag.