Stavros Papadopoulos Dimitris Papadias Weiwei Cheng Kian-Lee Tan Separating Authentication from Query Execution in Outsourced Databases. 1148-1151 2009 ICDE http://dx.doi.org/10.1109/ICDE.2009.187 conf/icde/2009 db/conf/icde/icde2009.html#PapadopoulosPCT09