Computer Science – Cryptography and Security
Scientific paper
2012-01-12
Computer Science
Cryptography and Security
Shorter version appeared on Information Hiding Conference 2011
Scientific paper
This paper presents a new privacy-preserving smart metering system. Our scheme is private under the differential privacy model and therefore provides strong and provable guarantees. With our scheme, an (electricity) supplier can periodically collect data from smart meters and derive aggregated statistics while learning only limited information about the activities of individual households. For example, a supplier cannot tell from a user's trace when he watched TV or turned on heating. Our scheme is simple, efficient and practical. Processing cost is very limited: smart meters only have to add noise to their data and encrypt the results with an efficient stream cipher.
Acs Gergely
Castelluccia Claude
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