Color image encryption based on finger vein key and off-axis digital holography with phase-modulated reference light

Area of Science:

• Computer Science
• Biometrics
• Cryptography
• Optics

Background:

• Traditional image encryption methods face challenges in security and key management.
• Biometric authentication offers a unique and secure alternative for access control.
• Digital holography provides a robust platform for optical information processing and encryption.

Purpose of the Study:

• To propose a novel color image encryption method utilizing finger vein biometrics and off-axis digital holography.
• To enhance security, key space, and robustness in color image encryption.
• To enable contactless authentication and secure ciphertext portability.

Main Methods:

• Color image encryption using channel separation, DNA coding, and double random phase coding (DRPE).
• Generation of finger vein-based quantum matrix keys for scrambling, masking, and phase masking.
• Off-axis digital holography encoding (ODHE) with phase-modulated reference light for holographic ciphertext generation.
• Contactless finger vein authentication for decryption access.

Main Results:

• The proposed method successfully encrypts and decrypts color images with high fidelity.
• Numerical simulations demonstrate high security levels, a large key space, and robustness against attacks.
• The finger vein key ensures secure and contactless authentication, enhancing overall system security.

Conclusions:

• The developed color image encryption method is highly feasible and secure.
• The integration of finger vein biometrics and digital holography offers significant advantages for secure image transmission.
• The method provides a robust and portable solution for sensitive color image data protection.