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    We present a novel optical voice encryption method using digital holography (DH) to record and secure human voices within holograms. This technique offers a new way to use voice data for enhanced security applications.

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    Area of Science:

    • Optics
    • Information Security
    • Acoustics

    Background:

    • Traditional voice encryption methods can be vulnerable to sophisticated attacks.
    • Digital holography (DH) offers a unique approach to optical data recording and retrieval.
    • There is a growing need for secure methods to handle sensitive voice data.

    Purpose of the Study:

    • To propose and demonstrate an optical voice encryption scheme using digital holography.
    • To explore the potential of using human voice as a security tool.
    • To investigate the direct encryption of voice information within holograms.

    Main Methods:

    • Utilizing off-axis digital holography to capture voice-induced phase retardation in an object wave.
    • Encrypting the acquired voice-bearing hologram using optical image encryption techniques.
    • Reconstructing and decrypting the hologram with precise parameters to retrieve the original voice.

    Main Results:

    • Successfully recorded human voice information within digital holograms.
    • Demonstrated the feasibility of optical encryption and decryption of voice data.
    • Experimental and simulation results validate the proposed scheme's effectiveness.

    Conclusions:

    • The proposed optical voice encryption scheme effectively records and encrypts human voice using DH.
    • The method provides a novel approach for voice data security and potential use as a security tool.
    • This technique is suitable for various security applications requiring robust voice data protection.