Sarkadi Tamás, Koppa Pál
Department of Atomic Physics, Budapest University of Technology and Economics, 8 Budafoki út, Budapest 1111, Hungary.
Appl Opt. 2012 Dec 1;51(34):8068-73. doi: 10.1364/AO.51.008068.
In this paper we propose a new (to our knowledge) complex spatial modulation method to encode data pages applicable in double random phase encryption (DRPE) to make the system more resistant to brute-force attack. The proposed modulation method uses data page pixels with random phase and amplitude values with the condition that the intensity of the interference of light from two adjacent pixels should correspond to the encoded information. A differential phase contrast technique is applied to recover the data page at the output of the system. We show that the proposed modulation method can enhance the robustness of the DRPE technique using point spread function analysis. Key space expansion is determined by numeric model calculations.
在本文中，我们提出了一种新的（据我们所知）复杂空间调制方法，用于对适用于双随机相位加密（DRPE）的数据页面进行编码，以使系统更能抵御暴力攻击。所提出的调制方法使用具有随机相位和幅度值的数据页面像素，条件是来自两个相邻像素的光的干涉强度应对应于编码信息。应用微分相衬技术在系统输出端恢复数据页面。我们通过点扩散函数分析表明，所提出的调制方法可以增强DRPE技术的鲁棒性。密钥空间扩展由数值模型计算确定。
