High-security optical encryption based on single-pixel imaging and structured light multiplexing holography

Area of Science:

• Optics
• Information Security
• Image Processing

Background:

• Single-pixel imaging (SPI) and optical multiplexing are increasingly used in optical encryption.
• Integration of SPI and optical multiplexing for enhanced security remains underexplored.

Purpose of the Study:

• To propose and demonstrate a dual-layer optical encryption scheme combining sample region-dependent SPI and structured light multiplexing holography.
• To leverage the synergistic benefits of SPI and structured light for advanced optical security applications.

Main Methods:

• Developed a dual-layer encryption scheme encrypting SPI bucket signals and sampling coordinates into a holographic ciphertext.
• Utilized spatial-structured light multiplexing holography for ciphertext generation.
• Employed a binary matrix key and multi-ramp helical-conical beams for decryption.

Main Results:

• Successfully decrypted the original secret image by retrieving the bucket signal and determining the sampling region from the ciphertext.
• Demonstrated the feasibility of encrypting both image data and spatial information.

Conclusions:

• The proposed scheme effectively integrates SPI and structured light multiplexing holography for robust optical encryption.
• This work highlights the potential of combining spatial mode multiplexing and region-dependent SPI for advanced optical security.