Chaos-based image encryption algorithm

First International Conference on Security and Privacy for Emerging Areas in Communications Networks (SECURECOMM'05), 2005

In the past few years, a number of image encryption algorithms based on chaotic maps have been proposed. A recently proposed Chaotic-Key Based Algorithm (CKBA) is based on a one-dimensional Logistic map. However, it has been shown that the current CKBA model is unavoidably susceptible to chosen/known-plaintext attacks, and that the high security claims against ciphertext-only attack were overestimated by the authors. In addition, the chaotic Logistic map yields unbalanced output. In this paper we enhance the CKBA algorithm three-fold: (1)we change the 1-D chaotic Logistic map to a piecewise linear chaotic map (PWLCM) to improve the balance property, (2)we increase the key size to 128 bits, and (3)-we add two more cryptographic primitives and extend the scheme to operate on multiple rounds so that the chosen/known-plaintext attacks are no longer possible. The new cipher has much stronger security and its performance characteristics remain very good. A security analysis for the proposed system is performed and presented.

International Journal of Engineering Research and Advanced Technology (IJERAT), 2019

Due to the tremendous developments in communication networks especially in the Internet network, which used to exchange many types of data by many people. Data security has become a major concern. Therefore, there is an increasing interest in the use of encryption and decryption methods. Many encryption methods have been developed to maintain data security, one of these methods that commonly used in recent are chaotic encryption systems. Where many methods were suggested to encrypt images using a chaotic map because their features such as sensitivity to initial conditions and unpredictability of random behaviors etc... In this paper, we attempt to review and describe many methods used to encrypt images and make a comparison among these methods.

With the advancement in digital communication and cyber crime, security in storage and transmission of digital images over communication media becomes a key issue. Encryption is one of the ways to ensure high security by masking the information. The use of traditional cryptosystems (such as RSA, DES-like cryptosystems) is not as efficient for images as it is for text data. This paper proposes a new algorithm for image encryption and decryption using twodimensional henon map for substitution and logistic map for pseudorandom permutation. The algorithm calculates the permuting address for rows and columns by bit XOR'ing the pixels of the image with pseudorandom values generated from henon map. This is followed by diffusion making use of full chaotic property of logistic map. Therefore, the algorithm has higher key space and higher degree of scrambling. The use of two chaotic maps increases resistance to brute force attack.

It is well-known that images are different from texts in many aspects, such as highly redundancy and correlation, the local structure and the characteristics of amplitude-frequency. As a result, the methods of conventional encryption cannot be applicable to images. In this paper, we improve the properties of confusion and diffusion in terms of discrete exponential chaotic maps, and design a key scheme for the resistance to statistic attack, differential attack and grey code attack. Experimental and theoretical results also show that our scheme is efficient and very secure.

International Journal of Advanced Research in Computer Science, 2017

In modern days there are various image encryption techniques forecast for bringing image reliability and protection in the internet for the evolution of government, medical applications, military. In this paper, we analysed many encryptions techniques of digital image utilizing multiple chaotic map methods of demands of security side. For the protection purpose, it is more essential or encryption of image is important method for establish protection. There is multiple encryption of image techniques scheduled, every image encryption method and decryption schemes have its own strengths and defects. In the paper, focusing on approaches to encryption of an image by chaotic map and to enhance the method to solve the major issues of encryption of image techniques by chaotic map.

IAENG International Journal of Computer Science

Chaotic cryptography has been widely studied in the last 20 years. A common issue in the design of several proposed chaos-based cryptosystems is the use of a single chaotic map in the encoding/decoding processes, fact which leads to a low level security. We present a new symmetric keystream image encryption scheme, in which three 2D chaotic maps, recently proposed by the authors, are used instead of a single chaotic map. Those maps are derived from some plans curves equations, their trigonometric forms ensuring a large key space. The proposed scheme has a bi-modular architecture, in which the pixels are shuffled via a random permutation generated by using a new efficient algorithm, and a diffusion stage, in which the pixels' values are altered using a new XOR-scheme. In order to evaluate the security of the proposed image encryption scheme, a standard analysis was carried out.

International Journal of Engineering Research and Advanced Technology , 2021

Due to the network and multimedia application developments, information security become important since information can be attacked over the transmission channels, and the combination of cryptography and chaotic become an important field of information security, where many encryption algorithms are based on chaotic mapping due to the inherent features of Image like high redundancy and bulk data capacity. In this paper, three chaotic maps are used to achieve a good diffused Image by setting the initial conditions to generate the shuffling sequence randomly by 2D Zaslevskii map and employ them in 2D cat map for shuffling the image pixels positions; also baker map is used to decomposed Image into four rectangles and shuffle them. For increasing the levels of security related to the encryption algorithm, the Gaffe random key generator is used to generate 128 bits keys and employ it with an exclusive-OR equation to the diffused Image. The results indicated that the combination of chaotic and cryptography proved to be good for the high-security level. The experimental results have shown that the suggested algorithm is secure due to the large key space and the high sensitivity to the secret key. This paper applies a chaotic map algorithm by Mat lab a program.

Complexity

Chaos-based encryption algorithms offer many advantages over conventional cryptographic algorithms, such as speed, high security, affordable overheads for computation, and procedure power. In this paper, we propose a novel perturbation algorithm for data encryption based on double chaotic systems. A new image encryption algorithm based on the proposed chaotic maps is introduced. The proposed chaotification method is a hybrid technique that parallels and combines the chaotic maps. It is based on combination between Discrete Wavelet Transform (DWT) to decompose the original image into sub-bands and both permutation and diffusion properties are attained using the chaotic states and parameters of the proposed maps, which are then concerned in shuffling of pixel and operations of substitution, respectively. Security, statistical test analyses, and comparison with other techniques indicate that the proposed algorithm has promising effect and it can resist several common attacks. Namely, t...

International Journal of Computer Applications, 2015

In the present time, Due to the rapid growth of digital communication and multimedia application, security becomes an important issue of communication, storage and transmission of digital data such as image, audio and video. Chaotic map based encryption is one of the ways to ensure high security of the image data. Encryption technique are used in many fields such as medical science, military, geographic satellite images. Thus due to this protecting the image data confidentiality, integrity, security, privacy as well as the authenticity has become an important issue for communication and storage of images via insecure channel like internet. Modern cryptography technique provides essential techniques for securing information and protecting multimedia data. In recent years, many encryption technology have been proposed. In this paper, first a general introduction given for cryptography and images encryption and followed by discussion of different type of chaotic based image encryption techniques and reviewed the related works for each technique. , At last, The main purpose of this paper is to help in design of new chaotic based image encryption techniques in future by studying the behavior of several existing chaotic based image encryption algorithms.

Encryption of images is different from that of texts due to some basic features of images such as bulk data capacity and high redundancy, which are generally difficult to handle by traditional means. Most of the available ciphers cannot be used directly to encrypt digital images in real-time systems because their encryption speed is not fast. In this paper, a chaotic image encryption schemes which uses a two-dimensional discretized Arnold's cat map was used for pixel permutation and a logistic map which is a one-dimensional chaotic map was used for key stream generator where the control parameter b is used as part of the secret key. The work was implemented using Microsoft Visual Basic 2008. The result shows an encrypted image which is decrypted by inverse of the map and the use of the secret keys. The chaotic system employed shows its simplicity in form and complexity in dynamics.