st phase, the DNA addition operation is applied on chaotically selected MSB of a pixel of one channel to LSB part of a pixel of other channel in a twisted fashioned named cross-substitution. The translated DNA bases from pseudo-random numbers are exclusive-or with cross substituted output to surge the complexity. The second substitution phase is accomplished by combining MSB part of a channel with randomly selecting LSB at pixel level. The novel algorithm is highly suitable for real time applications as it requires single round of permutation/substitution which can resist all possible statistical and differential attacks. The simulation results and analysis show that the proposed technique has the best quality output and highly efficient.">
A Selective Cross-Substitution Technique for Encrypting Color Images Using Chaos, DNA Rules and SHA-512 (original) (raw)