Single-Database Private Information Retrieval from Fully Homomorphic Encryption

@article{Yi2013SingleDatabasePI,
  title={Single-Database Private Information Retrieval from Fully Homomorphic Encryption},
  author={Xun Yi and Md. Golam Kaosar and Russell Paulet and Elisa Bertino},
  journal={IEEE Transactions on Knowledge and Data Engineering},
  year={2013},
  volume={25},
  pages={1125-1134}
}
Private Information Retrieval (PIR) allows a user to retrieve the ith bit of an n-bit database without revealing to the database server the value of i. In this paper, we present a PIR protocol with the communication complexity of O(γ logn) bits, where -y is the ciphertext size. Furthermore, we extend the PIR protocol to a private block retrieval (PBR) protocol, a natural and more practical extension of PIR in which the user retrieves a block of bits, instead of retrieving single bit. Our… CONTINUE READING
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