Multi-client predicate-only encryption for conjunctive equality tests
conference paper
We propose the first multi-client predicate-only encryption scheme capable of efficiently testing the equality of two encrypted vectors. Our construction can be used for the privacy-preserving monitoring of relations among multiple clients. Since both the clients’ data and the predicates are encrypted, our system is suitable for situations in which this information is considered sensitive. We prove our construction plaintext and predicate private in the generic bilinear group model using random oracles, and secure under chosen-plaintext attack with unbounded corruptions under the symmetric external Diffie–Hellman assumption. Additionally, we provide a proof-of-concept implementation that is capable of evaluating one thousand predicates defined over the inputs of ten clients in less than a minute on commodity hardware. © Springer Nature Switzerland AG 2018.
Topics
TNO Identifier
844197
ISSN
03029743 ; 9783030026400
Source
16th International Conference on Cryptology and Network Security, CANS 2017, 30 November 2017 through 2 December 2017, 11261 LNCS, pp. 135-157.
Publisher
Springer Verlag
Source title
Lecture Notes in Computer Science
Editor(s)
Capkun, S.
Chow, S.S.M.
Chow, S.S.M.
Pages
135-157
Files
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