Image encryption scheme with key sequences based on Chaotic functions

Shruthi, K. M.; Sheela, S. J.; Sathyanarayana, S. V.

doi:10.1109/ic3i.2014.7019667

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…In this approach, permutation and substitution operations are carried out after embedding the generated noise into image. 17 Shruthi et al 18 proposed a generator based on mathematic function of chaotic map, and this generates random sequences, which are highly sensitive to initial conditions. Such an approach improves uncertainty of the sequence generated since it integrates both good statistical properties of Pseudo Random Number Generator based on an Elliptic Curve and Pseudo Random Number Generator based on chaotic map.…”

Section: Literature Survey On Pseudo Random Number Generatormentioning

confidence: 99%

“…Due to high efficiency in both speed and bandwidth, it allows faster encryption and decryption. 17 Shruthi et al 18 proposed a generator based on mathematic function of chaotic map, and this generates random sequences, which are highly sensitive to initial conditions. In additive cipher system, this generator can be used as a key sequence generator.…”

Section: Literature Survey On Pseudo Random Number Generatormentioning

confidence: 99%

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Generation of pseudo random number sequence from discrete oscillating samples of equally spread objects and application for stream cipher system

Sudeepa¹,

Aithal

2019

Concurrency and Computation

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The demand on security privileged information has widely increased due to the sensitivity of the exchanged information over public communication channels. Nowadays, almost all organizations, mainly, business, financial, and government related areas, and also other regions are computerized, and sometimes, the data will be highly confidential. Since some areas dealing with confidential data, it is very much essential to provide the security for the data to avoid unauthorized access. Multimedia data security and security related issues have attracted many researchers towards it. Cryptography is necessary to protect the confidential information transmitting over the network. The strength of the cryptographic system, especially, stream cipher, is not only depending upon its encryption/decryption algorithm but also depends upon the randomness properties of the key sequence such as length, uniformity, independence, etc. In this work, a novel method of generating the pseudo random number that is based on the discrete equally spread oscillating points viewed orthogonally as an envelope has been considered for the generation. Depending on the number of samples, it is possible to get the higher length of the sequence. The random patterns generated by the discrete points of a moving wave are used to generate non binary random numbers. These numbers are used as key in stream cipher system. These are having greater advantages like one time padding to achieve perfect security in cryptographic application. The same non binary key sequence generated is applied for the cryptographic application, and the security parameters of the result obtained from cryptographic applications are also evaluated to observe the strength of security level. KEYWORDS discrete oscillating samples, Pseudo Random Number Generator, stream cipher system INTRODUCTIONData can be hacked during transmission through network channel. Hence, it is very essential to be transmitted in a secured manner. Cryptography is one of the major techniques to ensure security of data. Cryptography is a technique of transforming an original data into a particular form so that only those who know the key can read and process it. In cryptosystem, original message or data referred to as plain text. This could be transformed into non readable or scrambled form referred to as cipher text. This is done based on encryption algorithm. The encryption algorithm uses a key for changing the plain text into a cipher text. The cipher text can be recovered into its original form by an algorithm using a key known as decryption. The main goal of cryptography is data privacy (confidentiality), data authenticity, and data integrity (it cannot be modified in any way) in the digital world. Based on the type of key used for encryption/decryption, cryptography systems are categorized as symmetric key system and asymmetric key system. 1 The symmetric system can be categorized as stream and block cipher.Concurrency Computat Pract Exper. 2020;32:e5181. wileyonlinelibrary.com/journal/cpe Decryption Algor...

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Section: Literature Survey On Pseudo Random Number Generatormentioning

confidence: 99%

Section: Literature Survey On Pseudo Random Number Generatormentioning

confidence: 99%

Generation of pseudo random number sequence from discrete oscillating samples of equally spread objects and application for stream cipher system

Sudeepa¹,

Aithal

2019

Concurrency and Computation

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“…Shruthi et al [17] proposed a chaotic function-based image encryption mechanism. In this research authors design a linear feedback shift register for the way of controlling the randomness of sequences.…”

Section: Introductionmentioning

confidence: 99%

Circulate Matrix and Compression Sensing Based Multi-Level Image Encryption

Singh¹,

Gupta²,

Singh³

et al. 2022

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Digital data security is a broad research area in the field of science and technology. A lot of research was focused on information security-based mechanism for secure communication. This paper presents a novel image encryption as well as compression based on measurement matrix, pixel exchange and logistic cat map, which includes the permutation, compression, and diffusion processes. Initially the image is divided into four equal sizes of blocks and then each block is transformed into horizontal and vertical low and high frequency band. Then a random matrix multiplication function is applied to achieve an encrypted and scrambling frequency component and apply inverse DWT procedure to get first level of scrambled blocks, and further we apply the second level of security mechanism. Here each adjacent block pixel is exchanged by using the random matrices. For providing the high level of compression we design measurement matrices in compressive sensing by utilizing the circulate matrices and controlling the original column vectors of the circulate matrices with Arnold cat map. With the help of measurement matrix again the blocks are encrypted. Experimental results and performance analyses validate the good compression performance and high security of the given algorithm.

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“…When the chaotic sequences are binarized using a thresholding technique, 4 most of the binary sequences are not random due to inappropriate selection of the number of thresholding levels. In References 5,6 chaotic sequences are binarized by multiplying with a large number and taking the modulus of the result by a small number.…”

Section: Introductionmentioning

confidence: 99%

Generation of chaotic random binary sequences for cryptographic applications

Sheela¹,

Sathyanarayana²

2021

Concurrency and Computation

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In stream cipher systems, random key sequence generation is the primary task. The concept of chaotic systems can be considered in generating a random key sequence due to its inherent randomness property. Though the chaotic real sequences are random, the randomness will be lost after converting them to binary sequences. In this context, the authors propose a technique which uses a non‐linear feedback system to enhance the randomness of the binary sequences. In this work, three binary chaotic sequences using a logistic map are generated with three different initial conditions and each real value of the chaotic sequence is converted to ‘k’ bit binary value using a thresholding function. Some of the resulting sequences are not random. Hence, in this article a non‐linear structure is used to make the resulting sequence random. Here, a non‐linear function similar to the structure of the Simplified Data Encryption Standard is used to generate a sequence using two non‐random chaotic binary sequences. The resulting sequence is XORed with another non‐random chaotic binary sequence to get a random sequence. Sequences obtained from this nonlinear system are subjected to randomness tests and the results indicate that the sequences pass all the randomness tests. Hence, the sequences qualify as random key sequences, which can be used in a stream cipher based system to encrypt the data samples like audio, image, video, and so forth.

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Image encryption scheme with key sequences based on Chaotic functions

Cited by 6 publications

References 9 publications

Generation of pseudo random number sequence from discrete oscillating samples of equally spread objects and application for stream cipher system

Generation of pseudo random number sequence from discrete oscillating samples of equally spread objects and application for stream cipher system

Circulate Matrix and Compression Sensing Based Multi-Level Image Encryption

Generation of chaotic random binary sequences for cryptographic applications

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