Image Encryption using pseudo random permutation

Abstract

Data encryption is to conceal the information content of secret data. It is different from data hiding where the objective is to conceal the existence of secret data. A reversible data encryption technique can extract intended information content from the encrypted data without any loss of information. The decryption process should be done at legitimate or authentic receiver end. The encrypted data can be directly transmitted via communication channels because it completely lost its resemblance with the original information. Although it is theoretically possible to break such security, but it is not feasible by any known practical means and appear as a random-noise to non-intended recipients or adversaries. To incorporate second fold of security, a suitable data hiding method can be used to embed the encrypted data. This paper proposes a new visual data encryption method by shuffling pixel information randomly within the image. The reformation of image using proposed scheme completely looses the original characteristics. Our experimental results show the proposed method can achieve the claim.