A new chaos-based cryptosystem for secure transmitted images (original) (raw)
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Chaos Based Image Encryption and Decryption
In recent years, owing to frequent flow of digital images across the world over the transmission media, it has become essential to secure them from leakages. Due to the exceptionally desirable properties of mixing, sensitivity to initial conditions and parameters of chaotic maps; chaosbased encryption has recommended a new and efficient way to deal with the problem of fast and highly secure image encryption. The implemented image encryption scheme consists of an 80-bit secret key and uses chaotic map like Arnold Cat-Map and Logistic Map. The initial conditions for the chaotic maps are derived using the 80-bit secret key. In this cryptosystem, permutation-diffusion architecture followed by an efficient diffusion scheme is implemented. This scheme consists of two diffusion procedures, with a supplementary diffusion procedure padded after the normal diffusion. In the supplementary diffusion module, the control parameter of the selected chaotic map is altered by the resultant image produced after the normal diffusion operation. As a result, a slight difference in the plain image can be transferred to the chaotic iteration and bring about distinct key streams, and hence totally different cipher images will be produced. Therefore, this scheme can remarkably accelerate the diffusion effect of the cryptosystem and effectively resist differential attacks. Our project objective is to provide high level of security and satisfactory encryption speed for practical secure image applications.
A Novel Chaos-Based Image Encryption Scheme
2009 International Conference on Information Engineering and Computer Science, 2009
Recently, the chaotic maps have been investigated in order to develop more secure encryption schemes. In this paper we propose a new image encryption scheme with a classic bi-modular architecture: a diffusion stage, in which the pixels of the plain image are shuffled using a random permutation generated with a new algorithm, and a confusion stage, in which the pixels are modified with a XOR-scheme. In both stages are used four piecewise linear chaotic maps with very good cryptographic properties. The results of its statistical analysis show that the proposed image encryption scheme provides an efficient and secure way for image encryption.
A Review of Image Encryption Using Chaos based Techniques
2017
In open communication network, it is utmost crucial to keep sensitive information protected from becoming vulnerable to unauthorized access. Encryption process provides high security to the digital data content. Chaos theory has been broadly serviceable for encrypting image due to its multiple features. The discrete chaotic cryptographic system approaches are established on block and stream encryption schemes. If these two are combined the security level is significantly advanced. Chaos is used for expanding confusion and diffusion in images. Chaotic map gives benefits of large key space and high level security. In this paper, the survey of various chaos-based image encrypting techniques is done based on existing works. The paper also lays emphasis on the methodology of different techniques in detail.
Chaos Based Cryptosystem for Images
The utmost negative impact of advancement of technology is an exponential increase in security threats, due to which tremendous demand for effective electronic security is increasing importantly. Since chaos fundamentals such as ergodicity and high sensitivity to initial conditions are directly connected with two basic properties of good ciphers: confusion and diffusion, so chaos has emerged as a new promising candidate for cryptography. Although significant research has been done on chaos based cryptography still there are some of problems basically speed, that restrict the application of encoding/decoding algorithms. In the proposed technique Arnold cat map & Hénnon map have been employed during permutation substitution process to design a spatial domain based chaotic cryptosystem& only single iteration have been performed to make it faster. Thorough performance, security and comparative analysis ascertains efficacy of the proposed technique.
Efficient Image Chaotic Encryption Algorithm with No Propagation Error
ETRI Journal, 2010
Many chaos-based encryption methods have been presented and discussed in the last two decades, but very few of them are suitable to secure transmission on noisy channels or respect the standard of the National Institute of Standards and Technology (NIST). This paper tackles the problem and presents a novel chaos-based cryptosystem for secure transmitted images. The proposed cryptosystem overcomes the drawbacks of existing chaotic algorithms such as the Socek, Xiang, Yang, and Wong methods. It takes advantage of the increasingly complex behavior of perturbed chaotic signals. The perturbing orbit technique improves the dynamic statistical properties of generated chaotic sequences, permits the proposed algorithm reaching higher performance, and avoids the problem of error propagation. Finally, many standard tools, such as NIST tests, are used to quantify the security level of the proposed cryptosystem, and experimental results prove that the suggested cryptosystem has a high security level, lower correlation coefficients, and improved entropy.
Design and Implementation of Image Encryption using Chaos Theory
Due to the rise in the use of internet facility for data/information transmission, the data must be kept secured. The data to be transferred can also be an images. So that images being transmitted through the internet must also be kept much secured for gaining the trust from the users. The image encryption can be performed through many ways. The proposed method of image encryption is by mapping with the chaotic maps provided as chaos theory. The original image will be divided in to different blocks, then permute and diffuse separately at the pixel level of each block. Finally combine and diffuse the permuted image as a cipher image. The proposed method also experimented and tested to reach the current need of image encryption to maintain the security among the users.
Chaos Based Image Encryption Techniques: A Review
IRJET, 2022
Digital images are a common part of multimedia communication, and in the current scenario they are frequently used to transmit data. Therefore, their security is a major concern for them. Chaos maps are good for encrypting images because they are chaotic, ergodic, and highly sensitive to initial conditions. Many of the past proposed image encryption methods relied on lowdimensional chaotic maps, which are the least secure and have limited resistance to brute force and statistical attacks. In attempt to overcome this difficulty, researchers have created a variety of high-dimensional chaotic maps. This review article gives a scientific evaluation of a variety of studies conducted over the recent years that have employed chaotic in various forms to process digital images in the encryption.
Chaos-Based Image Encryption Using an Improved Quadratic Chaotic Map
2016
In recent years, chaos-based image encryption has become an efficient way to encrypt images due to its high security. In this paper, we improve the classical Quadratic chaotic map to enhance its chaotic properties and use it for image encryption. Compared with the classical Quadratic map, the proposed Quadratic map demonstrates better chaotic properties for encryption such as a much larger maximal Lyapunov exponent. The proposed image encryption scheme is based on two chaotic maps. The first map is the Chepyshev chaotic map, which is used for the permutation of the pixels of the image. The permuted image is subjected to the diffusion process using the improved Quadratic map in an efficient encryption algorithm which its key is related to the original image. The main advantages of the proposed scheme are the large key space and its resistance to various attacks. Simulation results show that the proposed scheme has a high security level with low computational complexity, which makes i...
Chaos-based image cipher has been widely investigated over the last decade or so to meet the increasing demand for real-time secure image transmission over public networks. In this paper, an improved diffusion strategy is proposed to promote the efficiency of the most widely investigated permutation-diffusion type image cipher. By using the novel bidirectional diffusion strategy, the spreading process is significantly accelerated and hence the same level of security can be achieved with fewer overall encryption rounds. Moreover, to further enhance the security of the cryptosystem, a plain-text related chaotic orbit turbulence mechanism is introduced in diffusion procedure by perturbing the control parameter of the employed chaotic system according to the cipher-pixel. Extensive cryptanalysis has been performed on the proposed scheme using differential analysis, key space analysis, various statistical analyses and key sensitivity analysis. Results of our analyses indicate that the new scheme has a satisfactory security level with a low computational complexity, which renders it a good candidate for real-time secure image transmission applications.