Universal service-providers for database private information retrieval (extended abstract)
PODC '98 Proceedings of the seventeenth annual ACM symposium on Principles of distributed computing
Journal of the ACM (JACM)
STOC '99 Proceedings of the thirty-first annual ACM symposium on Theory of computing
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One-way functions are essential for single-server private information retrieval
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SODA '01 Proceedings of the twelfth annual ACM-SIAM symposium on Discrete algorithms
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ACISP '01 Proceedings of the 6th Australasian Conference on Information Security and Privacy
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CT-RSA 2001 Proceedings of the 2001 Conference on Topics in Cryptology: The Cryptographer's Track at RSA
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ICALP '01 Proceedings of the 28th International Colloquium on Automata, Languages and Programming,
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ICISC '00 Proceedings of the Third International Conference on Information Security and Cryptology
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ISPEC'06 Proceedings of the Second international conference on Information Security Practice and Experience
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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.