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search.filters.applied.f.publicationcategory: Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı × Konu: Image processing ×

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  • Küçük Resim
    Yayın
    Cryptanalysis of a chaos-based image encryption algorithm
    (Elsevier Science BV, 2009-03-30) Çokal, Cahit; Solak, Ercan
    A chaos-based image encryption algorithm was proposed in [Z.-H. Guan, F. Huang, W. Guan, Phys. Lett. A 346 (2005) 153]. In this Letter, we analyze the security weaknesses of the proposal. By applying chosen-plaintext and known-plaintext attacks, we show that all the secret parameters can be revealed.
  • Küçük Resim
    Yayın
    Algebraic break of image ciphers based on discretized chaotic map lattices
    (Elsevier Science Inc, 2011-01-01) Solak, Ercan; Çokal, Cahit
    In this paper, we provide an algebraic cryptanalysis of a recently proposed chaotic image cipher. We show that the secret parameters of the algorithm can be revealed using chosen-plaintext attacks. Our attack uses the orbit properties of the permutation maps to deduce encryption values for a single round. Once a single round encryption is revealed, the secret parameters are obtained using simple assignments.