Replication is not needed: single database, computationally-private information retrieval

@article{Kushilevitz1997ReplicationIN,
  title={Replication is not needed: single database, computationally-private information retrieval},
  author={Eyal Kushilevitz and Rafail Ostrovsky},
  journal={Proceedings 38th Annual Symposium on Foundations of Computer Science},
  year={1997},
  pages={364-373}
}
  • E. Kushilevitz, R. Ostrovsky
  • Published 19 October 1997
  • Computer Science
  • Proceedings 38th Annual Symposium on Foundations of Computer Science
We establish the following, quite unexpected, result: replication of data for the computational private information retrieval problem is not necessary. More specifically, based on the quadratic residuosity assumption, we present a single database, computationally private information retrieval scheme with O(n/sup /spl epsiv//) communication complexity for any /spl epsiv/>0. 
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