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Erschienen in:
2015 | OriginalPaper | Buchkapitel
Cryptanalysis of Image Encryption Algorithm Based on Fractional-Order Lorenz-Like Chaotic System
verfasst von : Musheer Ahmad, Imran Raza Khan, Shahzad Alam
Erschienen in: Emerging ICT for Bridging the Future - Proceedings of the 49th Annual Convention of the Computer Society of India CSI Volume 2
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This paper provides break of an image encryption algorithm suggested by Xu
et al.
recently in [Commun Nonlinear Sci Numer Simulat 19 (10) 3735–3744 2014]
.
The authors realized a Laplace transformation based synchronization between two fractional-order chaotic systems to execute error-free encryption and decryption of digital images. The statistical analyses show the consistent encryption strength of Xu
et al.
algorithm. However, a careful probe of their algorithm uncovers underlying security shortcomings which make it vulnerable to cryptanalysis. In this paper, we analyze its security and proposed chosen plaintext-attack/known plaintext-attack to break the algorithm completely. It is shown that the plain-image can be successfully recovered without knowing secret key. The simulation of proposed cryptanalysis evidences that Xu
et al.
algorithm is not secure enough for practical utilization.