Optical encryption based on double random-phase encoding: secure versus unsecure variants

doi:10.1364/ao.383506

Optical encryption based on double random-phase encoding: secure versus unsecure variants

2020-03-12

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DOI：10.1364/ao.383506

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A smart brute-force double random-phase encoding attack is presented that takes advantage of an unreported vulnerability: the smoothness of mean squared error (MSE) and correlation coefficient (CC) curves in a key-sensitivity analysis. The vulnerability reported here is made visible in a key-sensitivity analysis. It is shown that a modular arithmetic pre-coding provides significant robustness against this form of attack because the pre-coding creates a highly nonlinear, highly oscillatory MSE and CC curve in the key space. Knowledge of this new vulnerability and how to prevent this in the first place provides a better understanding of the robustness of various double random-phase encoding designs.

Optical encryption based on double random-phase encoding: secure versus unsecure variants

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