Multiple images encryption based on 3D scrambling and hyper-chaotic system

Abstract

The growth and popularization of network and multimedia technologies have led to an increase in digital data over the internet. Most of the data is confidential and requires an efficient algorithm to securely transmit the data over the insecure channel. The paper proposes a cryptographic algorithm which can be used for securing multiple digital images over the network. The algorithm uses the concept of chaos theory and elliptic curve Elgamal cryptosystem for the generation of the cipher image and sharing of the key. A 3D image is generated using the multiple plain images and undergoes permutation and substitution phase for generation of the cipher data. Experimental results and analysis shows that the proposed algorithm has got large keyspace, desired statistical properties of cipher data and resistant to attacks.