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Association for Computing Machinery (ACM), ACM Transactions on Information and System Security, 3(18), p. 1-21, 2016

DOI: 10.1145/2873069

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

Journal article published in 2015 by Fabrice Benhamouda, Marc Joye, BenoîT Libert
This paper is available in a repository.
This paper is available in a repository.

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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, particularly in the context of privacy-preserving smart metering. This article 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.