Cumulant Expansion of Mutual Information for Quantifying Leakage of a Protected Secret

02/04/2021

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by   Olivier Rioul, et al.

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The information leakage of a cryptographic implementation with a given degree of protection is evaluated in a typical situation when the signal-to-noise ratio is small. This is solved by expanding Kullback-Leibler divergence, entropy, and mutual information in terms of moments/cumulants.