Paper 1996/006

Upper bound on the communication complexity of private information retrieval

Andris Ambainis


Private information retrieval was introduced by Chor, Goldreich, Kushilevitz and Sudan. It is the problem of reading a bit from the database so that it remains secret which bit we need. If the database exists in several identical copies, it is possible to ask queries so that each of copies alone does not get any information about the adress of the needed bit. We construct a scheme for private information retrieval with k databases and O(n sup (1/(2k-1)) ) bits of communication.

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Publication info
Published elsewhere. Appeared in the THEORY OF CRYPTOGRAPHY LIBRARY and has been included in the ePrint Archive.
Contact author(s)
ambainis @ cclu lv
1996-05-23: received
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Creative Commons Attribution


      author = {Andris Ambainis},
      title = {Upper bound on the communication complexity of private information retrieval},
      howpublished = {Cryptology ePrint Archive, Paper 1996/006},
      year = {1996},
      note = {\url{}},
      url = {}
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