1. AOL Search Data Scandal, August 2006. .
2. Reducing the servers’ computation in private information retrieval: PIR with preprocessing;Beimel;Journal of Cryptology,2004
3. M. Burmester, Y. Desmedt, A secure and efficient conference key distribution system, in: Eurocrypt’94, LNCS 950, Springer-Verlag, 1994, pp. 275–286.
4. B. Chor, N. Gilboa, M. Naor, Private information retrieval by keywords, Technical Report TR CS0917, Department of Computer Science, Technion, 1997.
5. B. Chor, O. Goldreich, E. Kushilevitz, M. Sudan, Private information retrieval, in: IEEE Symposium on Foundations of Computer Science (FOCS), 1995, pp. 41–50.