A Robust Optical Encryption Method for Three-Dimensional Object Based on the Fresnel Transform

Abstract

An optical encryption of three-dimensional (3D) object with digital holography was implemented. In the process of encryption, two holograms involved recording key information and 3D object were obtained. In the process of decryption, the 3D object was reconstructed from the two holograms by extracting the object and key information, followed by multiplication of the two holograms and inverse Fresnel transform numerically. The robustness of the method was also tested for different occlusions attacks and Gaussian noises. The results showed that the method was able to encrypt and decrypt the 3D object while being robust under different occlusions attacks and Gaussian noises.

Robustness Analysis of a Hyperchaos-Based Digital Image Encryption Algorithm under Noise Attacks

“…As a result of the inevitability of noise and cryptographic attacks, it is a design objective to test the robustness of a proposed image encryption algorithm in the presence of noise and cryptographic attacks such as statistical, differential and brute force attacks. Adding noise to an image as a means to test the robustness and performance of an algorithm in the presence of uncertainties is an effective approach that has been used extensively in the literature [20][21][22][23]. Due to modelling constraints, not all image encryption algorithms are robust against noise attacks [24], while some have low robustness to noise [25].…”