Mustafa Canim Murat Kantarcioglu Ali Inan Query Optimization in Encrypted Relational Databases by Vertical Schema Partitioning. 1-16 2009 Secure Data Management http://dx.doi.org/10.1007/978-3-642-04219-5_1 conf/sdmw/2009 db/conf/sdmw/sdmw2009.html#CanimKI09