Design of dividing reconfigurable phase mask by random size for optical security system

Abstract In this paper, we propose an algorithm for designing structured phase mask in random sized segmentation, which is the security key in optical cryptosystem. A scheme for the generation, store and encoding this mask is demonstrated. We present the numerical simulation results of the proposed phase masks employed in the double random phase encoding system. To show the improvements of this structured phase mask (SPM) over the random phase mask (RPM), the encryption and decryption behaviors of the SPM and RPM are compared. The structural parameters sensitivity simulations of the key were also performed.