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Nonlinear cryptosystem using scattering medium and echo state networks
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DOI：10.1016/j.optlaseng.2026.110039.png)
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Abstract
En 中文
• A tightly coupled physical-encryption-reservoir-decryption framework is proposed, integrating nonlinear optical encryption via scattering media with reservoir computing for the first time. • The dynamical-feature key extracted from the echo state network enables hardware-binding security, lightweight reconfigurability, and minimal key distribution. • The system achieves one-time-pad-class physical security with a PSNR exceeding 150 dB, while any key deviation collapses the output to noise. • Multi-pixel speckle responses are nonlinearly aggregated into a composite dynamical trajectory, providing a physical security foundation that inherently resists inversion attacks. • The decryption preserves full complex amplitude and phase information, enabling high-fidelity holographic reconstruction that most existing optical encryption methods cannot achieve.
Keywords:
Nonlinear optical encryption
Scattering medium
Reservoir computing
Echo state network
Hardware-bound key
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