A new efficient medical image cipher based on hybrid chaotic map and DNA code
- PDF / 2,373,158 Bytes
- 20 Pages / 439.642 x 666.49 pts Page_size
- 27 Downloads / 216 Views
A new efficient medical image cipher based on hybrid chaotic map and DNA code Ramzi Guesmi1 · M. A. Ben Farah2 Received: 1 January 2020 / Revised: 8 August 2020 / Accepted: 19 August 2020 / © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this paper, we propose a novel medical image encryption algorithm based on a hybrid model of deoxyribonucleic acid (DNA) masking, a Secure Hash Algorithm SHA-2 and a new hybrid chaotic map. Our study uses DNA sequences and operations and the chaotic hybrid map to strengthen the cryptosystem. The significant advantages of this approach consist in improving the information entropy which is the most important feature of randomness, resisting against various typical attacks and getting good experimental results. The theoretical analysis and experimental results show that the algorithm improves the encoding efficiency, enhances the security of the ciphertext, has a large key space and a high key sensitivity, and is able to resist against the statistical and exhaustive attacks. Keywords Image encryption · Chaos · SHA-2 · DNA · Entropy
1 Introduction During the previous two decades, the rapid growth and developments in digital image processing and network communications have created a great demand for securing image transmission over the Internet and through wireless networks.
1.1 Literature review In order to achieve this goal, many studies showed that cryptography is a reliable solution [12, 15–17, 19, 22, 36, 40]. In [22], Fridrich explained that the Data Encryption Standard, DES, which is one of the most common block encryption schemes, was designed for hardware implementation. As a matter of fact, software implementation remains relatively slow. M. A. Ben Farah
[email protected] Ramzi Guesmi [email protected] 1
LETI Laboratory, National Engineering School of Sfax, Sfax University, B.P.W. 3038, Sfax, Tunisia
2
Dept. of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, United Kingdom
Multimedia Tools and Applications
In [17], Chen confirmed that because of some intrinsic features of images, such as bulk data capacity and high correlation among pixels, traditional encryption algorithms such as DES, IDEA and RSA are not suitable for practical image encryption. In [50] and [14], authors approved that famous ciphers such as data encryption standard (DES),international data encryption algorithm (IDEA), advanced encryption standard (AES), and others were designed for the encryption of texts or general binary sequences. Consequently, they are not the optimal ciphers for image encryption. In order to enhance the security level, Fridrich, in [22] adopted the idea of using chaos for image encryption. He proposed a permutation-diffusion algorithm for chaos based encryption. The Fridrich’s scheme is based on two-dimensional discrete chaotic baker maps. The architecture of that system, which is based on confusion and diffusion criteria, is considered as the basic structure for many of the chaos based image encrypt
Data Loading...
