A New Framework for Privacy-Preserving Aggregation of Time-Series Data

Abstract : Aggregator-oblivious encryption is a useful notion put forward by Shi et al. in 2011 that allows an untrusted aggregator to periodically compute an aggregate value over encrypted data contributed by a set of users. Such encryption schemes find numerous applications, in particular in the context of privacy-preserving smart metering. This paper presents a general framework for constructing privacy-preserving aggregator-oblivious encryption schemes using a variant of Cramer-Shoup's paradigm of smooth projective hashing. This abstraction leads to new schemes based on a variety of complexity assumptions. It also improves upon existing constructions, providing schemes with shorter ciphertexts and better encryption times.
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https://hal.inria.fr/hal-01181321
Contributor : Marc Joye <>
Submitted on : Friday, July 31, 2015 - 7:56:39 PM
Last modification on : Saturday, March 16, 2019 - 5:10:08 PM
Long-term archiving on : Sunday, November 1, 2015 - 10:15:23 AM

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  • HAL Id : hal-01181321, version 1

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Fabrice Benhamouda, Marc Joye, Benoit Libert. A New Framework for Privacy-Preserving Aggregation of Time-Series Data. 2015. ⟨hal-01181321v1⟩

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