Cryptanalysis of an 'asymmetric optical cryptosystem based on coherent superposition and equal modulus decomposition'

摘要

We analyze and present an attack scheme of the asymmetric optical cryptosystem proposed recently based on coherent superposition and equal modulus decomposition [Opt. Lett. 40, 475 (2015)]. We prove that the attacker can recover the original image with the ciphertext and public keys through the amplitude-phase retrieval algorithm by using two constraints. One constraint of the amplitude- phase retrieval algorithm is the public key and the other is obtained through the analysis of the cryptosystem. The simulation results demonstrate the feasibility of the attack method. (C) 2015 Optical Society of America