2020 •
Catalic: Delegated PSI Cardinality with Applications to Contact Tracing
Authors: Duong, Thai, Phan, Duong Hieu, Trieu, Ni
Venue: N/A
Type: Publication
Abstract: Private Set Intersection Cardinality (PSI-CA) allows two parties, each holding a set of items, to learn the size of the intersection of those sets without revealing any additional information. To the best of our knowledge, this work presents the first protocol that allows one of the parties to delegate PSI-CA computation to untrusted servers. At the heart of our delegated PSI-CA protocol is a new oblivious distributed key PRF (Odk-PRF) abstraction, which may be of independent interest.
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