Image encryption and decryption using chaotic key sequence generated by sequence of logistic map and sequence of states of Linear Feedback Shift Register

Rohith, S; Bhat, Krishnaraj; Sharma, Ashutosh

doi:10.1109/icaecc.2014.7002404

Cited by 40 publications

(30 citation statements)

References 14 publications

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“…AES, RSA and DES are the available encryption algorithms, which involves a great number of computations. Chaos theory is a study of mathematics and it is practiced in many of the emerging areas like cardiology, EEG analysis, communication and weather prediction [1]. Chaos is extremely sensitive to initial conditions and it means a state of disorders.…”

Section: Introductionmentioning

confidence: 99%

Speech Scrambling Based on Chaotic Mapping and Random Permutation for Modern Mobile Communication Systems

Dhanya¹,

Jayakumari²

2020

csit

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The expanding significance of securing data over the network has promoted growth of strong encryptionalgorithms. To enhance the information protection in network communications, this paper presents a Randompermutation, chaotic mapping and pseudo random binary scrambling. It involves transforming the intelligible speechsignal into an unintelligible form to protect it from interrupters. In this report, suggest a simple and secure procedureto secure the speech signal. The speech scrambling process makes use of two Permutations. In the first step, Randompermutation algorithm is used to swap the rows of the original speech followed by swapping of rows using chaoticBernoulli mapping. This produces an intermediary scrambled speech. In the second measure, pseudo random binarygenerator is used to make the final scrambled signal. Various analysis tests are then executed to determine thequality of the encrypted image. The test results determine the efficiency of the proposed speech scrambling process.

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Section: Introductionmentioning

confidence: 99%

Speech Scrambling Based on Chaotic Mapping and Random Permutation for Modern Mobile Communication Systems

Dhanya¹,

Jayakumari²

2020

csit

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“…These systems generate aperiodic signals whose evolution, seen from the outside, lies on the edges between random and deterministic worlds. Therefore, the chaotic oscillators are of major interest for the generation of pseudo-random signals [3,4], or for the encryption of data [5][6][7], speech [8] or images [9][10][11][12]. Various modulation schemes, like the chaos shift keying, use a chaotic carrier in order to secure the transmission and to reinforce its confidentiality [13,14].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of a Digital Dual Orthogonal Outputs Chaotic Oscillator

et al. 2020

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Discrete time dynamical chaotic systems obey a set of recurrence equations involving one or more variables. Many chaotic maps have been proposed. None that simultaneously provides two sine–cosine outputs has stationary mean and standard deviation, or is quite robust with respect to the data format used in the hardware implementation. Here, we propose a chaotic oscillator based on a complex phasor whose angular argument evolves according to a geometric progression that is independent of the instantaneous amplitude. In order to maintain the oscillations, the phasor magnitude is normalized at each iteration using an approximation factor. The statistical characteristics of this oscillator are stationary in the short term, and do not depend on the initial conditions. The mean and standard deviation of the two orthogonal sequences quickly approach 0 and 1 / 2 , respectively. The resulting distribution is similar to that of a digital sine with a constant angular step. We also present an FPGA architecture and its implementation results. This oscillator can be used in modulation schemes, such as the chaotic shift keying one or for data and image encryption. Finally, we show an original application that exploits the orthogonality of the two chaotic signals for the simultaneous encryption of two digital images.

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“…Esse problemaé ressaltado ao tratar de imagens em meios de comunicação online [4]. Uma das propostas atuais para criptografia de imagensé a utilização de sistemas caóticos e o aprimoramento de geradores para cifragem em fluxo, sendo utilizado inclusive combinacão dessas duas técnicas, como em [15] [16].…”

Section: Introductionunclassified

Análise dos Algoritmos de Perfil II do Projeto eSTREAM para Criptografia de Imagens

César

Lacerda

Silva

2017

Anais Do Simpósio Brasileiro De Sistemas De Informação (SBSI)

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RESUMO Segurança e privacidade sempre foram alvo de pesquisas, mas atualmente com a popularização dos meios de comunicação em massa, como a Internet, esse assunto se torna ainda mais fundamental. A comunicação nos dias de hoje nãoé realizada apenas pela troca de arquivos de texto ouáudio, mas também pela troca de imagens digitais. Sistemas de criptografia vêm sendo constantemente aprimorados e padronizados para prover segurança e privacidade, inclusive para algoritmos especialistas em cifra de imagens. Apesar de serem traduzidas em dados binários assim como os textos, as imagens possuem características particulares que impedem o uso de sistemas de criptografia populares, como o RSA, DES e AES. Sistemas de criptografia por fluxo são compactos e de simples implementação. Para promover seu desenvolvimento o ECRYPT (European Network of Excellence for Cryptology) organizou o projeto eSTREAM, resultando em um portfólio de cifras de fluxo validadas para implementacões em software e hardware. O presente artigo apresenta a análise das cifras de Perfil II desse projeto quanto a sua qualidade quando aplicadas em imagens digitais.ABSTRACT Security and privacy have always been the subject of research, but currently with the popularization of mass media, such as the Internet, this subject becomes even more fundamental. Communication today is not only done by exchanging text or audio files, but also by exchanging digital images files. Encryption systems have been constantly improved and standardized to provide security and privacy, including algorithms specialized in image encryption. Although they are translated into binary data as well as texts, the images have particular characteristics that prevent the use of popular cryptographic systems such as RSA, DES and AES. Stream cipher systems are compact and simple to implement. To promote their development ECRYPT (European Network of Excellence for Cryptology) has organized the eS-TREAM project, resulting in a portfolio of validated stream ciphers for software and hardware implementations. This article presents the analysis of eSTREAM Profile II ciphers regarding their quality when applied in digital images.

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Image encryption and decryption using chaotic key sequence generated by sequence of logistic map and sequence of states of Linear Feedback Shift Register

Cited by 40 publications

References 14 publications

Speech Scrambling Based on Chaotic Mapping and Random Permutation for Modern Mobile Communication Systems

Speech Scrambling Based on Chaotic Mapping and Random Permutation for Modern Mobile Communication Systems

Design and Implementation of a Digital Dual Orthogonal Outputs Chaotic Oscillator

Análise dos Algoritmos de Perfil II do Projeto eSTREAM para Criptografia de Imagens

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