Multiple-3D-object decryption based on one interference using two phase-only functions

Abstract

We propose a multiple-3D-object decryption scheme based on one interference using two beams that are from two different phase-only functions. It takes advantage of off-axis digital holography to extract the optical fields of multiple 3D objects, and respectively utilize single different decryption keys to decrypt multiple 3D objects in the decryption procedure. The advantages of the proposed scheme include the following: each 3D object can be decrypted discretionarily without decrypting a series of other objects earlier; no iterative algorithm is involved; and the decrypted image of each object can be successfully clearly distinguished. The feasibility of the proposed scheme is verified by the optical holograms of real 3D objects.

Optical encryption of multiple three-dimensional objects based on multiple interferences and single-pixel digital holography

“…Recently, Li et al effectively solved the above two problems by proposing a three-step phase shifting method for the multiple-3D-object secure information system. [16,17] The huge storage required for storing and transmitting the ciphertext is another major issue. To the best of our knowledge, it has not been resolved.…”