Optical color image cryptosystem based on fresnel diffraction and phase modulation in extended fractional Fourier transform domain

Key Points

• Image encryption improves through phase modulation techniques, aiding in secure optical cryptography.
• Key evidence shows enhanced robustness against attacks with higher dimensional encoding techniques, achieving significant security progress.
• Methodology involves a novel application of fractional Fourier transform alongside Fresnel diffraction principles in optical systems.
• Findings highlight the potential for optical cryptography advancements but call for further exploration in practical implementations.