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    Area of Science:

    • Optics and Photonics
    • Information Security
    • Digital Imaging

    Background:

    • Optical encryption systems are crucial for secure data transmission.
    • Quick Response (QR) codes offer a versatile data-carrying capability.
    • Integrating QR codes into optical encryption presents unique challenges.

    Purpose of the Study:

    • To experimentally implement a novel optical encryption system utilizing QR codes.
    • To develop a multiplexing procedure for encrypting QR codes.
    • To propose a single-device protocol for QR code-based optical encryption.

    Main Methods:

    • A joint transform correlator in an interferometric configuration was used for experimental implementation.
    • A multiplexing procedure was applied to encrypt the QR code.
    • Speckle noise was eliminated using a digital post-processing technique.

    Main Results:

    • The experimental implementation successfully encrypted and decrypted a QR code.
    • Original information was retrieved completely free of degradation after decryption.
    • A single-device protocol was proposed and implemented for reception, decryption, and reading.

    Conclusions:

    • The proposed method offers a practical and attractive solution for optical data security.
    • The integration of QR codes enhances the feasibility of optical encryption techniques.
    • Experimental results validate the practicality and effectiveness of the developed security system.