Algebra-chaos amalgam and DNA transform based multiple digital image encryption

Abstract

This study suggests a novel color multiple image encryption technique using “Algebra-Chaos Amalgamated 256-length-12-bit random sequence” and DNA Transform. The proposed random sequence (S-box) has the property of occupying small computer memory space as regards to the existing S-boxes. Moreover, for simplicity and novelty, 1D sin chaotic map and 1D logistic map are mixed to generate a 1D mixed Chaotic map. Initially, a 12 × 12 (256-length-12-bit) S-box is designed by the unit elements of a chain ring, and then it is mixed with the 1-D mixed chaotic map that results triplets T1,T2 and T3 of high random behavior. A multiple digital image encryption is performed by using the triplet for substitution-permutation along with DNA transform. The proposed image encryption technique enhances key-space size. Moreover, the experimental results show that the proposed technique of encryption for digital medium has extra ordinary resistance against the well-known attacks.