Research on optical security based on simulated noise induced encryption scheme

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The security of a noise-induced optical encryption scheme with two dimensional keys is examined by a series of statistical analysis. We introduce the cross correlation function (CCF) and mutual information (MI) approach to estimate the time-delay information, which is considered as the most important physical key in the secure strategy. Subsequently, the other key can be cracked by using the independent component analysis (ICA) method. Meanwhile, the plaintext can be extracted with a small deviation.