An image encryption algorithm using the combination of chaotic maps

Abstract

Nowadays, as the science and technology are advanced, users are more willing to use the visual data and also such kind of data in medical and military applications. Therefore, unauthorized access to personal and confidential information has become a critical problem in today’s digital world. Encryption is an appropriate method for fixing such problems. Due to high size of data and high correlation among the image’s adjacent pixels, texts encryption algorithms are not good for image encryption. In designing an algorithm for the future generations, three principles should be met: firstly, algorithm should be so simple that it is evaluated and analyzed easily, accurately and completely. Secondly, an encryption algorithm should have a security margin much more than the required for current identified attacks. Thirdly, in design, the tools and ideas already known and reliable should be utilized as much as possible. Hence, in this paper, an image encryption algorithm is proposed by combination of two Henon chaos and Logistic systems. Experimental results confirm and demonstrate that the proposed method yields better outcomes in the field of security against the statistical and differential attacks compared to the original AES encryption algorithm and previous modified encryption algorithms.