Smart meter privacy using a rechargeable battery: Minimizing the rate of information leakage

A rechargeable battery may be used to partially protect the privacy of information contained in a household's electrical load profile. We represent the system as a finite state model to make tractable the computation of the rate of information leakage. Specifically, we use a trellis algorithm t...

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Bibliographic Details
Published in2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) pp. 1932 - 1935
Main Authors Varodayan, David, Khisti, Ashish
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2011
Subjects
Batteries
Computational modeling
data privacy
energy storage
Home appliances
information security
Load modeling
Privacy
Smart grids
Stochastic processes
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Summary:A rechargeable battery may be used to partially protect the privacy of information contained in a household's electrical load profile. We represent the system as a finite state model to make tractable the computation of the rate of information leakage. Specifically, we use a trellis algorithm to estimate the mutual information rate between the battery's input and output loads. We show that stochastic battery policies can leak 26% less information than a so-called best-effort algorithm (that holds the output load constant whenever possible). We finally describe the extension of the technique to more realistic models of the battery system.
ISBN:9781457705380
1457705389
ISSN:1520-6149
DOI:10.1109/ICASSP.2011.5946886