Das Bhargab, Yelleswarapu Chandra S, Rao D V G L N
Physics Department, University of Massachusetts Boston, MA 02125.
Opt Commun. 2012 Oct 1;285(21-22):4262-4267. doi: 10.1016/j.optcom.2012.06.056.
We present a robust encryption method for the encoding of 2D/3D objects using digital holography and virtual optics. Using our recently developed dual-plane in-line digital holography technique, two in-line digital holograms are recorded at two different planes and are encrypted using two different double random phase encryption configurations, independently. The process of using two mutually exclusive encryption channels makes the system more robust against attacks since both the channels should be decrypted accurately in order to get a recognizable reconstruction. Results show that the reconstructed object is unrecognizable even when the portion of the correct phase keys used during decryption is close to 75%. The system is verified against blind decryptions by evaluating the SNR and MSE. Validation of the proposed method and sensitivities of the associated parameters are quantitatively analyzed and illustrated.
我们提出了一种使用数字全息术和虚拟光学对二维/三维物体进行编码的强大加密方法。利用我们最近开发的双平面同轴数字全息术技术，在两个不同平面记录两个同轴数字全息图，并分别使用两种不同的双随机相位加密配置进行加密。使用两个相互排斥的加密通道的过程使系统对攻击更具鲁棒性，因为为了获得可识别的重建结果，两个通道都必须准确解密。结果表明，即使在解密过程中使用的正确相位密钥部分接近75%时，重建的物体也无法识别。通过评估信噪比和均方误差对该系统进行了抗盲解密验证。对所提方法的有效性以及相关参数的敏感性进行了定量分析和说明。
