CRYPTANALYSIS OF FRIDRICH'S CHAOTIC IMAGE ENCRYPTION
Ercan Solak, Cahit Çokal, Olcay Taner Yıldız, Türker Bı́yı́koğlu · International Journal of Bifurcation and Chaos · 2010
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 permutation that is used to shuffle the pixels of a round input. We demonstrate the effectiveness of our attack with examples and simulation results. We also show that our proposed attack can be generalized to other well-known chaotic image encryption algorithms.