Experimental estimation of sample entropy in a semiconductor laser with optical feedback for random number generation

Abstract

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Estimating the entropy rate of physical random number generators with uncertainty is crucial for information security applications. We evaluate the sample entropy of chaotic temporal waveforms generated experimentally by a semiconductor laser with time-delayed optical feedback. We demonstrate random number generation with uncertainty using a quantitative measurement of the entropy rate.

Keywords

• entropy rate
• sample entropy
• semiconductor lasers
• chaos
• random number generation
• information security