Multi-client predicate-only encryption for conjunctive equality tests

Multi-client predicate-only encryption for conjunctive equality tests

van de Kamp, T.
Peter, A.
Everts, M.H.
Jonker, W.

Capkun, S. (editor)
Chow, S.S.M. (editor)

2018

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.

Multi-client functional encryption
Predicate-only encryption
Privacy-preserving multi-client monitoring
Network security
Bilinear groups
Chosen-plaintext attack
Commodity hardware
Encryption schemes
Functional encryptions
Multiple clients
Privacy preserving
Proof of concept
Cryptography

http://resolver.tudelft.nl/uuid:543aca39-5e22-41a2-a648-09c0121369e3

844197

Springer Verlag

9783030026400

0302-9743

Lecture Notes in Computer Science, 11261 LNCS, 135-157

conference paper