A Hybrid Cryptosystem for Image using Chaotic Mapping
Nidhi Sethi · International Journal of Computer Science and business informatics/International journal of computer science and business informatics · 2013
In this paper, we have proposed a new method to develop secure image-encryption techniques using a Chirikov Standard Map and Modified Logistic Map. Here, Chirikov standard map is used to shuffle the pixels of the image and hence creating the confusion and modified logistic mapping is used for pixel permutation. Since this scheme of encryption is symmetric, so the transportation of key is an issue. This issue is resolved in the proposed work by image steganography using a new proposed algorithm. Hence in all, the proposed technique consists of two steps. In the first step, the original image is encrypted using chaotic mapping. In second step the secret keys used for encryption and authentication are embedded in the encrypted image. The result shows that the proposed method is resistant to statistical attack, differential attack ,brute force attack and histogram analysis attack.