Wenqi He

TL;DR: An overview of the potential, recent advances, and challenges of optical security and encryption using free space optics is presented, highlighting the need for more specialized hardware and image processing algorithms.

TL;DR: It is demonstrated in this paper that the traditional double random phase encoding (DRPE) technique is vulnerable to ciphertext-only attack (COA), and the proposed scheme mainly relies on a hybrid iterative phase retrieval (HIPR) algorithm, which combines various phase retrieval algorithms.

TL;DR: Theoretical analysis and numerical simulations validate the feasibility of the proposed multiple-image encryption method via lifting wavelet transform (LWT) and XOR operation, based on a row scanning compressive ghost imaging scheme.

TL;DR: It is demonstrated that the RPE-based optical cryptosystems are vulnerable to the chosen-plaintext attack (CPA) with deep learning strategy, and the results indicate the possibility of reconstructing images (plaintexts) outside the original data set.

TL;DR: The hybrid input-output (HIO) algorithm is employed to handle the issue to be solved in the COA scheme of a ciphertext-only attack on a joint transform correlator (JTC) encryption system with an inartificial signal domain support and a given frequency domain constraint.