针对混合输入输出(HIO)等数值攻击算法攻击联合变换相关器(JTC)加密系统运行时间长、攻击效率低的问题, 设计了一种基于光路迭代的光学唯密文攻击系统。该系统充分利用了光学系统高速并行处理的特点, 通过光束在光学系统中的光学傅里叶变换取代在计算机上的数字傅里叶变换, 显著缩短了攻击算法的运行时间, 有效提高了对JTC加密系统的攻击效率。仿真结果表明, 相较于HIO攻击算法, 在迭代次数相同的条件下, 基于光路迭代的光学唯密文攻击系统有效减少了算法的运行时间, 显著提高了对JTC加密系统的攻击效率。

Aiming at the problem that the numerical attack algorithms such as hybrid input-output (HIO) algorithm attack the JTC encryption system with long running time and low attack efficiency, an optical ciphertext-only attack system based on optical path iteration is designed. The system utilizes the characteristics of high-speed parallel processing of optical system, and replaces the digital Fourier transform by optical Fourier transform, which significantly reduces the running time of the algorithm and effectively improves the attack efficiency. The simulation results show that compared with the HIO algorithm, the optical ciphertext-only attack system effectively reduces the running time of the algorithm and significantly improves the attack efficiency of the JTC encryption system under the same number of iterations.