Image encryption algorithm based on total shuffling scheme and chaotic S-box transformation

This paper presents an image encryption scheme based on complete shuffling algorithm: limited in the skew tent-map-predicated image cryptosystem and chaotic substitution box transformation. The proposed image encryption algorithm provides extra confusion due to the inclusion of a chaotic S-box. It is well known from the literature that simple image encryption based on a total shuffling scheme is not secure against a chosen cipher text attack. We then projected an extended algorithm which does well against a chosen cipher text attack. Furthermore we analyze the proposed technique for unified average changing intensity (UACI) and NPCR analysis to determine its strength.