scholarly journals On the Sanctuary of a Combined Confusion and Diffusion based scheme for Image Encryption

2019 ◽  
Vol 9 (1) ◽  
pp. 3258-3263 ◽  
Keyword(s):  
Image Encryption ◽  
Initial Conditions ◽  
Random Sequence ◽  
Multimedia Data ◽  
Hadamard Transformation ◽  
Key Length ◽  
Two Stages ◽  
Sequence Generator ◽  
And Diffusion ◽  
Confusion And Diffusion

Confusion and diffusion are the frequently used embryonics in multimedia (image) encryption systems. Multimedia data protection against cryptanalysis can be effectually fortified by these techniques. Due to inherent properties of images such as high inter-pixel redundancy and bulk data capacity, encryption is performed in two stages: Confusion and Diffusion. In this article, a combined Pseudo Hadamard transformation in the confusion stage and Gingerbreadman chaotic substitution in the diffusion stage are used in the encryption phase of the algorithm. The strong correlation between contiguous elements in the host image is effectually reduced using Pseudo Hadamard transformation and entropy in the cipher image is enhanced using Gingerbreadman chaotic substitution. Secrete key length used in the algorithm is 128 bits, these are the initial conditions for Gingerbreadman chaotic generator. The elements of S-box in the substitution stage are considered from this random sequence generator. Experimental exploration including information entropy, correlation analysis, sensitivity analysis, key space analysis and computational complexity have been performed on set of standard images. Results obtained are better compared to many existing systems.

A New Image Encryption Scheme Using Dual Chaotic Map Synchronization

2020 ◽  
Vol 18 (1) ◽  
Keyword(s):  
Image Encryption ◽  
Chaotic Systems ◽  
Initial Conditions ◽  
Chaotic Map ◽  
Security Applications ◽  
The Common ◽  
And Diffusion ◽  
Confusion And Diffusion ◽  
Sensitivity To Initial Conditions ◽  
Diffusion Properties

Chaotic systems behavior attracts many researchers in the field of image encryption. The major advantage of using chaos as the basis for developing a crypto-system is due to its sensitivity to initial conditions and parameter tunning as well as the random-like behavior which resembles the main ingredients of a good cipher namely the confusion and diffusion properties. In this article, we present a new scheme based on the synchronization of dual chaotic systems namely Lorenz and Chen chaotic systems and prove that those chaotic maps can be completely synchronized with other under suitable conditions and specific parameters that make a new addition to the chaotic based encryption systems. This addition provides a master-slave configuration that is utilized to construct the proposed dual synchronized chaos-based cipher scheme. The common security analyses are performed to validate the effectiveness of the proposed scheme. Based on all experiments and analyses, we can conclude that this scheme is secure, efficient, robust, reliable, and can be directly applied successfully for many practical security applications in insecure network channels such as the Internet

scholarly journals Security Analysis and Improvement of an Image Encryption Cryptosystem Based on Bit Plane Extraction and Multi Chaos

Entropy ◽  
2021 ◽  
Vol 23 (5) ◽  
pp. 505
Author(s):  
Shuqin Zhu ◽  
Congxu Zhu
Keyword(s):  
Image Encryption ◽  
Random Sequence ◽  
Security Analysis ◽  
Encryption Algorithm ◽  
Original Algorithm ◽  
Plane Extraction ◽  
Bit Plane ◽  
Bit Planes ◽  
And Diffusion ◽  
Improved Algorithm

This paper analyzes the security of image encryption systems based on bit plane extraction and multi chaos. It includes a bit-level permutation for high, 4-bit planes and bit-wise XOR diffusion, and finds that the key streams in the permutation and diffusion phases are independent of the plaintext image. Therefore, the equivalent diffusion key and the equivalent permutation key can be recovered by the chosen-plaintext attack method, in which only two special plaintext images and their corresponding cipher images are used. The effectiveness and feasibility of the proposed attack algorithm is verified by a MATLAB 2015b simulation. In the experiment, all the key streams in the original algorithm are cracked through two special plaintext images and their corresponding ciphertext images. In addition, an improved algorithm is proposed. In the improved algorithm, the generation of a random sequence is related to ciphertext, which makes the encryption algorithm have the encryption effect of a “one time pad”. The encryption effect of the improved algorithm is better than that of the original encryption algorithm in the aspects of information entropy, ciphertext correlation analysis and ciphertext sensitivity analysis.

Analysis of Image Encryption Algorithm Based on Chaotic Signal

2013 ◽  
Vol 756-759 ◽  
pp. 2024-2029
Author(s):  
Yu Chi Zhao ◽  
Jing Liu
Keyword(s):  
Image Encryption ◽  
Chaotic Dynamics ◽  
Random Sequence ◽  
Experimental System ◽  
Chaotic Signal ◽  
Encryption Algorithm ◽  
Dynamics Model ◽  
Computer Simulation Experiment ◽  
Sequence Generator ◽  
Image Encryption Algorithm

This paper, based on the characteristics of the chaotic dynamics system, by analyzing the characteristics of many chaotic dynamics model in image encryption and screening studies such as comparison (computer simulation experiment), combined with some specific practices of modern encryption system, regards the chaotic signal as the carrier hiding image information, for the purpose of image encryption. It regards chaotic system as a pseudo-random sequence generator, uses the way of compounding multiple chaos, combined with image replacement technology, designs image encryption algorithm of practical value and completes the development of the experimental system of image encryption

scholarly journals Image Encryption Algorithm Based on Hyperchaotic Maps and Nucleotide Sequences Database

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Ying Niu ◽  
Xuncai Zhang ◽  
Feng Han
Keyword(s):  
Image Encryption ◽  
Dna Sequences ◽  
Information Storage ◽  
Differential Attack ◽  
Processing Ability ◽  
Pixel Location ◽  
Digital Image Encryption ◽  
And Diffusion ◽  
Confusion And Diffusion ◽  
Image Encryption Algorithm

Image encryption technology is one of the main means to ensure the safety of image information. Using the characteristics of chaos, such as randomness, regularity, ergodicity, and initial value sensitiveness, combined with the unique space conformation of DNA molecules and their unique information storage and processing ability, an efficient method for image encryption based on the chaos theory and a DNA sequence database is proposed. In this paper, digital image encryption employs a process of transforming the image pixel gray value by using chaotic sequence scrambling image pixel location and establishing superchaotic mapping, which maps quaternary sequences and DNA sequences, and by combining with the logic of the transformation between DNA sequences. The bases are replaced under the displaced rules by using DNA coding in a certain number of iterations that are based on the enhanced quaternary hyperchaotic sequence; the sequence is generated by Chen chaos. The cipher feedback mode and chaos iteration are employed in the encryption process to enhance the confusion and diffusion properties of the algorithm. Theoretical analysis and experimental results show that the proposed scheme not only demonstrates excellent encryption but also effectively resists chosen-plaintext attack, statistical attack, and differential attack.

An efficient image encryption scheme using lookup table-based confusion and diffusion

2015 ◽  
Vol 81 (3) ◽  
pp. 1151-1166 ◽  
Author(s):  
Jun-xin Chen ◽  
Zhi-liang Zhu ◽  
Chong Fu ◽  
Li-bo Zhang ◽  
Yushu Zhang
Keyword(s):  
Image Encryption ◽  
Lookup Table ◽  
Encryption Scheme ◽  
And Diffusion ◽  
Confusion And Diffusion

scholarly journals A New Cipher Based on Feistel Structure and Chaotic Maps

2019 ◽  
Vol 16 (1(Suppl.)) ◽  
pp. 0270
Author(s):  
Al-Bahrani Et al.
Keyword(s):  
Chaotic Maps ◽  
Dynamical Behavior ◽  
Logistic Map ◽  
Data Encryption ◽  
Lookup Table ◽  
Secret Key ◽  
Text Length ◽  
Sequence Generator ◽  
And Diffusion ◽  
Confusion And Diffusion

Chaotic systems have been proved to be useful and effective for cryptography. Through this work, a new Feistel cipher depend upon chaos systems and Feistel network structure with dynamic secret key size according to the message size have been proposed. Compared with the classical traditional ciphers like Feistel-based structure ciphers, Data Encryption Standards (DES), is the common example of Feistel-based ciphers, the process of confusion and diffusion, will contains the dynamical permutation choice boxes, dynamical substitution choice boxes, which will be generated once and hence, considered static,             While using chaotic maps, in the suggested system, called Chaotic-based Proposed Feistel Cipher System (CPFCS), we made the confusion and diffusion in dynamical behavior based on Standard and Lorenz maps. The first is used for substitution, and the second one for permutation operations .A proposed cryptographic system uses the same work (the same way) for both enciphering and deciphering. The proposed cipher operates on more than 500 bytes (4000-bit) readable text blocks by six round computing. Within the basic operator of the cipher, i.e., in the function of the round F, a dynamical lookup table 2D standard map system is used to enhance the complexity and diffusion of the unreadable text. Also, a 3D Logistic map used for key sequence generator and chaos based dynamical Initial Permutation (dynamical IP) are used to increase the diffusion and confusion. Three different image sizes and three different text length were implemented in CPFCS.  The results of the proposed system and security tests improve the applicability of PFCS in the data protection and security.

scholarly journals A New Cipher Based on Feistel Structure and Chaotic Maps

2019 ◽  
Vol 16 (1) ◽  
pp. 0270
Author(s):  
Al-Bahrani Et al.
Keyword(s):  
Chaotic Maps ◽  
Dynamical Behavior ◽  
Logistic Map ◽  
Data Encryption ◽  
Lookup Table ◽  
Secret Key ◽  
Text Length ◽  
Sequence Generator ◽  
And Diffusion ◽  
Confusion And Diffusion

Chaotic systems have been proved to be useful and effective for cryptography. Through this work, a new Feistel cipher depend upon chaos systems and Feistel network structure with dynamic secret key size according to the message size have been proposed. Compared with the classical traditional ciphers like Feistel-based structure ciphers, Data Encryption Standards (DES), is the common example of Feistel-based ciphers, the process of confusion and diffusion, will contains the dynamical permutation choice boxes, dynamical substitution choice boxes, which will be generated once and hence, considered static,             While using chaotic maps, in the suggested system, called Chaotic-based Proposed Feistel Cipher System (CPFCS), we made the confusion and diffusion in dynamical behavior based on Standard and Lorenz maps. The first is used for substitution, and the second one for permutation operations .A proposed cryptographic system uses the same work (the same way) for both enciphering and deciphering. The proposed cipher operates on more than 500 bytes (4000-bit) readable text blocks by six round computing. Within the basic operator of the cipher, i.e., in the function of the round F, a dynamical lookup table 2D standard map system is used to enhance the complexity and diffusion of the unreadable text. Also, a 3D Logistic map used for key sequence generator and chaos based dynamical Initial Permutation (dynamical IP) are used to increase the diffusion and confusion. Three different image sizes and three different text length were implemented in CPFCS.  The results of the proposed system and security tests improve the applicability of PFCS in the data protection and security.

scholarly journals ENHANCED CHAOTIC IMAGE ENCRYPTION ALGORITHM BASED ON TRIGONOMETRIC FUNCTIONS

2013 ◽  
pp. 246-249
Author(s):  
M.K MOHSINA ◽  
ROBIN ABRAHAM
Keyword(s):  
Image Encryption ◽  
Chaotic Maps ◽  
Initial Conditions ◽  
Random Sequence ◽  
Chaotic Map ◽  
Secret Key ◽  
Home Office ◽  
One Dimensional ◽  
Extreme Sensitivity ◽  
Differential Attacks

The advent of wireless communications, both inside and outside the home-office environment has led to an Increased demand for effective encryption systems. The encryption of images is quite different from that of the texts due to the bulk data capacity and high redundancy of images. Traditional methods are difficult to handle the image encryption because of their small space of pseudo random sequence. At present, the chaotic maps have been widely used in image encryption for their extreme sensitivity to tiny changes of initial conditions. The chaos based algorithms have suggested a new and efficient way to deal with the problem of fast and highly secure image encryption. In this paper, we propose an algorithm in which two one-dimensional chaotic maps are used instead of a one-dimensional chaotic map. We also use an external secret key of 96-bits. Thereby it significantly increases the resistance to statistical and differential attacks. The results of experiment, statistical analysis, correlation coefficient analysis and key sensitivity tests show that the algorithm is of great security and practicability.

Fusion of confusion and diffusion: a novel image encryption approach

2016 ◽  
Vol 65 (1) ◽  
pp. 65-78 ◽  
Author(s):  
Padmapriya Praveenkumar ◽  
Rengarajan Amirtharajan ◽  
Karuppuswamy Thenmozhi ◽  
John Bosco Balaguru Rayappan
Keyword(s):  
Image Encryption ◽  
And Diffusion ◽  
Confusion And Diffusion

Chaos Theory and Systems in Cloud Content Security

2019 ◽  
pp. 367-390
Author(s):  
Kanksha Zaveri ◽  
Niti Shah ◽  
Ramchandra S. Mangrulkar
Keyword(s):  
Cloud Computing ◽  
Chaos Theory ◽  
Initial Conditions ◽  
Random Number Generation ◽  
Third Party ◽  
Confidential Data ◽  
Server Systems ◽  
And Diffusion ◽  
Confusion And Diffusion ◽  
Multi Server

Cloud computing involves storing data using a third party that ensures that confidential data cannot be accessed even by the cloud itself. Thus, security is one major issue in cloud computing. Recent advancements in exploiting chaotic systems' sensitivity to initial conditions, and their ability to extract strings of random numbers for confusion and diffusion have helped enhance security. They can provide resistance from statistical attack and protection against reconstruction dynamics. However, the concept of chaos for security is still in its emerging stages. This chapter presents how chaos theory can be used for random number generation to further secure data in the cloud. The authors have discussed and compared some popular methods for authentication and encryption of data, images, and videos. The overview of chaos engineering discusses the discipline of experimenting on multi-server systems to ensure its ability to tackle glitches.

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