Symmetric key image encryption using chaotic Rossler system

Abstract

In this article, an algorithm for encryption of digital image based on chaos theory is proposed. This encryption algorithm includes two main operations of image element shuffling and pixel replacement. The analysis of cryptographic strength (resistance attack) has been performed to confirm the fact. The results of several experimental tests, such as key space analysis, key sensitivity analysis, and statistical analysis, show that the proposed algorithm for image cryptosystems provides an efficient and secure way for image encryption and the hacker cannot decrypt an encrypted image without original key. A comparison in terms of correlation between the original and encrypted images, number of pixels change rate, unified average changing intensity, and mean absolute error is performed, which proves that the plain image is very different from the encrypted one. We have also performed fixed point analysis to know how many pixels remain fixed after pixel shuffling operation. Copyright © 2013 John Wiley & Sons, Ltd.

FPGA Implementation and Design of a Hybrid Chaos-AES Color Image Encryption Algorithm

“…The three-dimensional chaotic Rössler system [18] is used for image encryption. It can be described as Equation (1).…”

“…In [13,14], another scheme is proposed to verify the randomness of the image, called "Shannon's local entropy." We also use Shannon local entropy analysis to validate our purposed scheme [15][16][17][18][19][20][21][22][23][24][25][26][27].The rest of the paper is organized as follows. Section 2 presents our designed four-dimensional chaotic system and proposed image encryption scheme.…”

A Chaos-Based Authenticated Cipher with Associated Data

“…Chaotic maps are deterministic dynamical systems that have random-like behavior, sensitivity to slight changes in initial parameters, ergodicity, diffusion, and confusion characteristics. These qualities are analogous to requirements in cryptographic algorithms; thus chaotic maps have been used to design hash functions [11], encryption algorithms [12], key exchange protocols [13], and digital signature schemes [14]. Authenticated image encryption schemes based on chaos have been introduced by Bakhshandeh and Eslami [15] as well as Yang et al [16].…”

A secure image encryption algorithm based on chaotic maps and SHA‐3

“…Normally, strong correlation exists in any natural meaningful plain‐image. A good encryption scheme should reduce greatly the correlation coefficients to near zeros . By selecting randomly some pairs of adjacent pixels from three directions, that is, horizontally, vertically, and diagonally, the results are listed in Table according to the equation .…”