Yi Tang Fang Liu Liqing Huang Generalization-Based Private Indexes for Outsourced Databases. 161-175 2013 DASFAA (1) https://doi.org/10.1007/978-3-642-37487-6_14 conf/dasfaa/2013-1 db/conf/dasfaa/dasfaa2013-1.html#TangLH13