Now showing items 1-2 of 2

  • Breaking an orbit-based symmetric cryptosystem 

    Solak, Ercan; Rhouma, Rhouma; Belghith, Safya Mdimegh (Pergamon-Elsevier Science LTD, 2011-09)
    We report a break for a recently proposed class of cryptosystems. The cryptosystem uses constant points of a periodic secret orbit to encrypt the plaintext. In order to break the system, it suffices to sort the constant ...
  • Cryptanalysis of Fridrich\'s chaotic image encryption 

    Solak, Ercan; Çokal, Cahit; Yıldız, Olcay Taner; Bıyıkoğlu, Türker (WORLD SCIENTIFIC PUBL CO PTE LTD, 2010-05)
    We cryptanalyze Fridrich's chaotic image encryption algorithm. We show that the algebraic weaknesses of the algorithm make it vulnerable against chosen-ciphertext attacks. We propose an attack that reveals the secret ...