Claude Castelluccia Einar Mykletun Gene Tsudik E.cient Aggregation of encrypted data in Wireless Sensor Networks. 109-117 2005 conf/mobiquitous/2005 MobiQuitous http://doi.ieeecomputersociety.org/10.1109/MOBIQUITOUS.2005.25 db/conf/mobiquitous/mobiquitous2005.html#CastellucciaMT05