title: Cryptanalysis of an "asymmetric optical cryptosystem based on coherent superposition and equal modulus decomposition".
abstract: 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)OPLEDP0146-959210.1364/OL.40.000475]. 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.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Wu
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Zhengjun
authors.initials: Z
authors.lastname: Liu
authors.forename: Shutian
authors.initials: S
authors.lastname: Liu