Georgios Amanatidis Alexandra Boldyreva Adam O'Neill Provably-Secure Schemes for Basic Query Support in Outsourced Databases. 14-30 2007 conf/dbsec/2007 DBSec http://dx.doi.org/10.1007/978-3-540-73538-0_2 db/conf/dbsec/dbsec2007.html#AmanatidisBO07