A New Fuzzy-DNA Image Encryption and Steganography Technique

Abstract

Image encryption and steganography techniques are receiving a lot of interest and investigations due to their high importance in multimedia communication systems. A novel highly efficient image encryption and steganography technique are presented in this paper. For the first time, the proposed technique uses hybrid DNA encoding and Choquet's Fuzzy Integral sequences. At first, a confused version of the image, using a simple chaotic map, is encoded using DNA's bases. Four coded images are generated using the four DNA bases, namely AT, CG, GC, and TA. Parallel to that, a Choquet's fuzzy Integral sequence is generated and DNA encoded similarly to obtain four pseudo-random sequences. Secondly, the resulting four fuzzy/DNA sequences are used to diffuse the four DNA encoded images using the complementary DNA XOR rule, according to certain control code. Finally, the wavelet fusion algorithm is then used to fuse the resulting four fuzzy-DNA encoded images, to get the encrypted image. For added security, a new steganography approach is used. In particular, the encrypted image is divided into four sub-images, each of which is hidden in a different carrier image selected from a known group of carrier images according to a given key. The simulation results and security analysis confirmed the efficiency of the proposed image encryption algorithm as well as the steganography approach used for enhanced security. Ten different images with a size of 256 × 256 are used to test the proposed method. The results show that the proposed algorithm has a higher key sensitivity. The pixel correlation coefficient values are very small (between 5.3220e-04 and 0.0011 horizontally, between 8.7670e-04 and 0.0022 vertically and between 0.0002 and 0.0045 diagonally). Furthermore, the measured information entropy of the encrypted images is between 7.9970 and 7.9979 which are very close to the ideal value of 8. Additionally, the measured unified average changing intensity and number of pixels change rate values take the values between 33.46 and 33.39 and between 99.61 and 99.64, respectively, which are again closed to the ideal values. The steganography test shows that the hidden encrypted images are almost invisible at high values of SNR and are characterized by good NCC values under different types of attacks. The performance of the new proposed algorithm is proved to overcomes many other previously published image encryption techniques.

New DNA Coded Fuzzy Based (DNAFZ) S-Boxes: Application to Robust Image Encryption Using Hyper Chaotic Maps

“…-Generation of DNAFZ S-Boxes: 1) Choquet fuzzy integral (CFI) is applied for generating four random sequences. As explained in our previous work in [28], [29], the initial conditions (key) for the generation of these CFI pseudorandom sequences depends on two components. One of these components is a secret sequence (key) of finite length, while the other component is a secret image.…”

“…A fuzzy integral is used to aggregate information; it is a nonlinear function that depends on the fuzzy measure that gives an alternative computational algorithm. In [10], [28], [29], [33], [34], the features of CFI are described.…”

“…In this article, CFI is used as a basis for the generation of four random sequences that are highly secure [28], [29]. from a group of images, a 6-bit key is used.…”

A Method to Determine the Most Suitable Initial Conditions of Chaotic Map in Statistical Randomness Applications

“…Therefore, it is desired that the outputs thought to be random are statistically independent. Cryptology is another application area where randomness is critical [5,6]. Statistical independence is necessary but not sufficient in this discipline where sensitive data should be anonymized.…”

Minimal Block Knight’s Tour and Edge with LSB Pixel Replacement Based Encrypted Image Steganography

“…Knight’s tour matrix neighborhood addition modulo encryption is performed to get the encrypted image in two phases. Said et al, [ 14 ] proposed image encryption and steganography technique using DNA encoding Choquet’s integral sequences. Four coded images are produced using the DNA bases and integral sequences are generated, Choquet’s approach used to get four random sequences that are encoded.…”