Three-Dimensional Single Random Phase Encryption.

Area of Science:

• Optics and Photonics
• Information Security
• Computational Imaging

Background:

• Conventional double random phase encryption (DRPE) requires two masks and complex-valued decryption.
• DRPE is vulnerable to key disclosure, potentially allowing data reconstruction.
• Decryption in DRPE necessitates taking the absolute value of complex-valued data.

Purpose of the Study:

• To propose a novel optical encryption technique, single random phase encryption (SRPE).
• To enhance security and simplify decryption compared to DRPE.
• To leverage integral imaging and computational reconstruction for improved data security and quality.

Main Methods:

• Developed single random phase encryption (SRPE) using one random phase mask.
• Incorporated additive white Gaussian noise (AWGN) and volumetric computational reconstruction (VCR) with integral imaging.
• Utilized multiple observations to improve decrypted data quality and employed reconstruction depth as a security key.

Main Results:

• SRPE enhances security, preventing reconstruction even if key information is known.
• Volumetric computational reconstruction (VCR) effectively removes AWGN through averaging.
• Increasing observations significantly improves structural similarity (SSIM) of decrypted data.
• Successful decryption of 3D data is achieved with SRPE at the correct reconstruction depth.

Conclusions:

• SRPE offers a more secure and efficient optical encryption method than DRPE.
• The proposed technique simplifies decryption and introduces reconstruction depth as an additional security layer.
• Integral imaging with VCR provides robust noise removal and enables 3D data decryption.