D. Song, D.Wagner, and A. Perrig. Practical techniques
for searches on encrypted data. In Proc. of IEEE Symposium
on Security and Privacy, 2000.

J. Li, Q. Wang, C. Wang, N. Cao, K. Ren, and W. Lou.
Enabling efficient fuzzy keyword search over encrypted
data in cloud computing. In Proc. of INFOCOM, 2010.

C. Gentry. Fully homomorphic encryption using ideal
lattices. In Proc. of the ACM Symposium on Theory of
Computing (STOC), 2009.

B. Chor, O. Goldreich, E. Kushilevitz, and M. Sudan.
Private information retrieval. In Proc. of FOCS, 1995.

R. A. Popa, N. Zeldovich, and H. Balakrishnan.
CryptDB: A practical encrypted relational DBMS.
In Proc. of SOSP, 2011.