A survey on security and efficiency issues in chaotic image encryption

Gayathri, J.; Subashini, S.

doi:10.1504/ijics.2016.080427

Cited by 14 publications

(5 citation statements)

References 91 publications

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“…In terms of the key space, our proposed FCPRNG outperforms the generator discussed in [47] and [48], which use adaptive Zaslavasky map and Chirikov map with key space of 2 212 and 2 159 , respectively. The acquired key space is also greater than almost all the encryption schemes in [49].…”

Section: Key Spacementioning

confidence: 98%

Image encryption based on fractional chaotic pseudo-random number generator and DNA encryption method

et al. 2022

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Nonlinear dynamic systems and chaotic systems have been quite exhaustively researched in the domain of cryptography. However, the possibility of using the fractional chaotic system in the cryptosystem design has been much less explored while it bears advantages such as enlarged keyspace, compared to classical nonlinear systems.This paper, therefore, proposes a novel structure for the pseudo-random number generator based on fractional chaotic systems which consists of 3 different fractional chaotic systems, namely fractional Chen's system, Lu's system, and fractional generalized double-humped logistic map(FGDHL). Then, the outputs of this fractional chaotic pseudo-random number generator(FCPRNG) are used as a keystream for an image encryption scheme. The confusion layer of the scheme is conducted by a dynamic DNA encoding and decoding method combined with a 2D cat map for the permutation in the DNA-bases level. The diffusion layer is performed through the adoption of a 32 bits discrete logistic map. The performance and security analysis have been conducted for the above-designed cryptosystem, proving that the proposed cryptosystem is practical and secure in image encryption.

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Section: Key Spacementioning

confidence: 98%

Image encryption based on fractional chaotic pseudo-random number generator and DNA encryption method

et al. 2022

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“…Another class of chaotic maps are developed to overcome the limited and discontinuous range of chaotic maps, namely the coupled map lattice (CML) [30,31]. It attributes spatiotemporal chaos [32,33], which is nonlinear and complex in spatially extended systems. A large number of positive Lyapunov exponents of the spatiotemporal system guarantee very high randomness and ergodicity.…”

Section: Classification Of Chaosmentioning

confidence: 99%

Review of Chaos Detection Techniques Performed on Chaotic Maps and Systems in Image Encryption

Muthu

Murali

2021

SN COMPUT. SCI.

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The security concern in recent times has been rising exponentially, this has lead for highly secured image transmission. Chaos-based image encryption is increasingly used to protect images with high degree of security than other encryption techniques. Hence, novel chaotic dynamical systems are developed for this purpose with more advanced features and models. Various chaos detection techniques are performed on them to examine and measure their complexity. This paper analyzes the frequency of the chaos tests performed on 25 discrete chaotic maps and 18 continuous chaotic systems and reviewed for their effectiveness. It is observed that the bifurcation diagram and Lyapunov exponent are the most highly used tests for chaotic maps. Whereas, phase portrait and bifurcation diagram are commonly used for chaotic systems. Tests such as 0-1 test, three-state test and some entropy tests are seldom used. Further, the dynamics of the chaotic systems are better studied than the chaotic maps. But in most cases of chaotic maps, the test is performed only for certain random control parameter range, and its dynamics beyond that range is unknown. Hence, it is crucial to realize three important facts. First, a complete examination of the novel system must be performed with the appropriate chaos detection technique. Second, the complete range of the chaotic and non-chaotic region of a system must be presented. Third, the strength of chaos must be examined. These results are essential for generating a highly secured nonlinear key for an encryption algorithm, which makes it resistant to various attacks.

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“…The recent studies have shown that the efficiency of traditional cryptographic schemes, including widely used Advanced Encryption Standard (AES), is relatively low in the case of multimedia data encryption [47] . One of the possible advantages of chaotic cryptography is higher encryption speed [48] .…”

Section: Encryption Speed Analysismentioning

confidence: 99%

“…The averaged encryption speed for the proposed algorithm is 315 B/ms. Gayathri and Subashini [48] presented the comparison of the encryption speed for different chaos-based cryptosystems (See Table 7 in [48] ). The authors investigated eight algorithms based on different chaotic maps.…”

Section: Encryption Speed Analysismentioning

confidence: 99%