【Information Theoretic Distinguishers for #Timing_Attacks with Partial Profiles: Solving the Empty Bin Issue】

Read full article: https://tinyurl.com/y56gavc8

Article by Eloi De Chérisey, et al., from LTCI, Télécom Paris, Institut Polytechnique de Paris (France), etc.

The discrete nature of timing leakage leads to an empty bin issue which appears when a data value in the attacking phase has never been seen during the profiling phase. In this paper, the researchers derived several “information-theoretic” distinguishers as possible solutions to the empty bin issue and showed in particular that the empty bins, previously believed to be an annoyance and dropped accordingly, can turn out to be valuable assets for the attacker as long as they are treated carefully. Meanwhile, throughout the paper, real timing data were used, making the results very practical. #Profiling_Attacks