A Robust Chaos-Based Image Cryptosystem with an Improved Key Generator and Plain Image Sensitivity Mechanism

Abstract

In this paper, we propose an effective gray image cryptosystem containing Arnold cat map for pixel permutation and an improved Logistic map for the generation of encryption keys to be used for pixel modification. Firstly, a new chaotic map is designed to show better performance than the standard one in terms of key space range, complexity and uniformity. Generated secret key is not only sensitive to the control parameters and initial condition of the improved map but also strongly depend on the plain image characteristic which provides an effective resistance against statistical and differential attacks. Additionally, to get higher encryption strength of the cryptosystem, both confusion and diffusion processes are performed with different keys in every iterations. Theoretical analysis and simulation results confirm that the proposed algorithm has superior security and effectively encrypts and decrypts the gray images as well.

Transmission of Frequency Balance Instructions and Secure Data Sharing Based on Chaos Encryption in Smart Grid-Based Energy Systems Applications

“…Applications of chaotic systems in engineering science have become very popular especially in the field of secure communication, cryptography, steganography for the last decades. Encryption techniques based on chaos gain more concern in the secure communication areas due to complexity, sensitivity of initial condition, random-like behavior and ergodicity of chaos which meet Shannon's requirement in cryptography [47][48][49][50][51].…”

Speech encryption by multiple chaotic map with fast fourier transform

“…The proposed algorithm used to increase the confusion and diffusion of speech samples. From [18], a new algorithm for speech encryption was introduced by dividing the speech signal into overlapped blocks prior shuffling those blocks into the time domain. A second permutation is performed for the coefficients of the block which was obtained from the wavelet transforms by using chaotic key based on Hénon map, and partially encoding the shuffled online speech signal in a transform scope.…”

A Chaotic Cryptosystem using Conjugate Transcendental Fractal Function

“…In FFCT phase, a plain image is transformed into a temporary cipher image, which is further encrypted using a secret key obtained through multi-fractal images. Similarly, in [42], a system key was generated by using multiple fractal images by adding feedback delay, multiplexing and independent horizontal and vertical shifts in the process. However, a cryptosystem was designed by using different keys at each iteration to encrypt the image [43].…”