aggregate processing cost per query. Next, notice that as d increases, the bandwidth consumption of policy Pd increases as well. The larger d is, the more likely the policy will waste bandwidth by sending the query out to too many nodes.
niques designed for wireless sensor networks. On the other side, the aggregate query processing module is embedded inside the server to support aggregate query processing over anonymized locations. TinyCasper system administrators can change the privacy requirement,, kanonymity requirement, at anytime. Finally, system users can issue snap