Image encryption algorithm based on substitutionprinciple and shuffling scheme

Abstract EN

This research presents a method of image encryption that has been designed based on thealgorithm of complete shuffling, transformation of substitution box, andpredicated image crypto-system.

This proposed algorithm presents extra confusionin the first phasebecause of including an S-boxbased on using substitution by AES algorithm in encryption and its inverse in Decryption.

In the second phase, shifting and rotationwere used based on secrete key in each channel depending on the result from the chaotic map, 2D logistic map and the output was processed and usedfor the encryption algorithm.

Itis knownfrom earlier studiesthat simple encryption ofimages based on thescheme of shuffling is insecure in the face of chosen ciphertext attacks.

Later, an extended algorithm has beenprojected.

Thisalgorithm performs well against chosen ciphertext attacks.

In addition, the proposed approachwas analyzed for NPCR, UACI(Unified Average Changing Intensity), andEntropy analysis for determining its proposed algorithm presents extra confusionin the first phasebecause of including an S-boxbased on using substitution by AES algorithm in encryption and its inverse in Decryption.

In the second phase, shifting and rotationwere used based on secrete key in each channel depending on the result from the chaotic map, 2D logistic map and the output was processed and usedfor the encryption algorithm.

Itis knownfrom earlier studiesthat simple encryption ofimages based on thescheme of shuffling is insecure in the face of chosen ciphertext attacks.

Later, an extended algorithm has beenprojected.

Thisalgorithm performs well against chosen ciphertext attacks.

In addition, the proposed approachwas analyzed for NPCR, UACI(Unified Average Changing Intensity), andEntropy analysis for determining its strength