Weakly-Private Information Retrieval
Paper i proceeding, 2019

Private information retrieval (PIR) protocols make it possible to retrieve a file from a database without disclosing any information about the identity of the file being retrieved. These protocols have been rigorously explored from an information-theoretic perspective in recent years. While existing protocols strictly impose that no information is leaked on the file’s identity, this work initiates the study of the tradeoffs that can be achieved by relaxing the requirement of perfect privacy. In case the user is willing to leak some information on the identity of the retrieved file, we study how the PIR rate, as well as the upload cost and access complexity, can be improved. For the particular case of replicated servers, we propose two weakly-private information retrieval schemes based on two recent PIR protocols and a family of schemes based on partitioning. Lastly, we compare the performance of the proposed schemes.

Information theory

Information retrieval

Författare

H.-Y. Lin

Simula UiB

Siddhartha Kumar

Simula UiB

Eirik Rosnes

Simula UiB

Alexandre Graell I Amat

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

E. Yaakobi

Technion – Israel Institute of Technology

IEEE International Symposium on Information Theory - Proceedings

21578095 (ISSN)

Vol. 2019 1257-1261 8849444

IEEE International Symposium on Information Theory (ISIT)
Paris, France,

Distribuerad lagring för datalagring och trådlös leverans av data

Vetenskapsrådet (VR), 2016-01-01 -- 2019-12-31.

Ämneskategorier

Telekommunikation

Kommunikationssystem

Reglerteknik

Datavetenskap (datalogi)

DOI

10.1109/ISIT.2019.8849444

Mer information

Senast uppdaterat

2019-11-04