Cryptanalysis of Image Cryptosystem Using Synchronized 4D Lorenz Stenflo Hyperchaotic Systems

Lately, a color image cryptosystem is suggested for secure wireless communication using 4D Lorenz Stenflo hyperchaotic systems. The proposition specified a nonlinear state feedback-based synchronization for master-slave Lorenz Stenflo chaotic systems. It presents seemingly successful application of synchronized chaotic systems for image encryption which is backed by simulations to assess the efficiency and stability of encryption. However, the image cryptosystem has the presence of certain loopholes. This paper aims to propose the cryptanalysis of this cryptosystem by exploiting existing vulnerabilities and loopholes. To prove that encryption algorithm is devoid of security, we mount the proposed attacks in the form of chosen-plaintext attack that recover the plaintext image from encrypted image without secret key. It is, therefore, shown through experimental simulations that the image cryptosystem is all insecure for use in practical applications of image-based secure wireless communication.