Discussion and a new attack of the optical asymmetric cryptosystem based on phase-truncated Fourier transform

• DOI: 10.1364/ao.53.000208
• Publication Date: 2014-01-07T16:25:51Z
• Authors: Xiaogang Wang; Yixiang Chen; Chaoqing Dai; Daomu Zhao
• Keywords: 0103 physical sciences; 01 natural sciences

A discussion and a cryptanalysis of the optical phase-truncated Fourier-transform-based cryptosystem are presented in this paper. The concept an asymmetric cryptosystem, which was introduced into image encryption scheme based on Fourier transforms 2010, is suggested to be retained encryption. new method attack also proposed simultaneously obtain main information original image, two decryption keys from its cyphertext, public modified amplitude-phase retrieval algorithm. numerical results illustrate that computing efficiency algorithm improved number iterations much less than by specific attack, has iteration loops.