González-Moncada Juan Andrés, Velez-Zea Alejandro, Barrera-Ramírez John Fredy
Appl Opt. 2024 May 20;63(15):4182-4191. doi: 10.1364/AO.518364.
We present, to our knowledge, a novel method to achieve experimental encryption using double random phase encoding with full complex modulation and a single phase-only spatial light modulator. Our approach uses double phase encoding to generate phase-only holograms containing complex-valued input planes for a joint transform correlator (JTC) cryptosystem. This approach enables users to independently manipulate both the phase and amplitude of the cryptographic keys and objects, thereby significantly enhancing the versatility of the optical cryptosystem. We validate the capabilities of our proposed scheme by generating optimized random phase masks and using them to experimentally encrypt various grayscale and binary objects. The experimental complex modulation obtained with the system detailed in this work, in conjunction with optimized random phase masks, results in an enhancement in the quality of the decrypted objects during reconstruction. Both numerical simulations and experimental findings corroborate the effectiveness of our proposal.
据我们所知，我们提出了一种新颖的方法，该方法利用具有全复调制的双随机相位编码和单个纯相位空间光调制器来实现实验加密。我们的方法使用双相位编码来生成包含用于联合变换相关器（JTC）密码系统的复值输入平面的纯相位全息图。这种方法使用户能够独立地操纵加密密钥和对象的相位和幅度，从而显著提高光学密码系统的通用性。我们通过生成优化的随机相位掩模并使用它们对各种灰度和二进制对象进行实验加密，来验证我们提出方案的能力。使用本文详细介绍的系统获得的实验复调制，结合优化的随机相位掩模，在重建过程中提高了解密对象的质量。数值模拟和实验结果都证实了我们方案的有效性。
