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

作者：Benhamouda Fabrice^*; Joye Marc^*; Libert Benoit^*

来源：ACM Transactions on Information and System Security, 2016, 18(3): 10.

DOI：10.1145/2873069

• Private aggregation
• aggregator-oblivious encryption
• smart metering
• smooth projective hashing
• security reduction

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.

• 出版日期2016-4