11-05-2013, 04:47 PM
SafeQ: Secure and Efficient Query Processing in Sensor Networks ppt
SafeQ Secure.ppt (Size: 1.85 MB / Downloads: 41)
Storage nodes can be compromised
Storage nodes are attractive to be attacked
Sensitive data collected by sensors are stored in storage nodes
It raises two security problems if a storage node is compromised
How to preserve the privacy of sensor collected data and sink issued queries?
How to preserve the integrity of query result?
Problem Statement: Privacy and Integrity Preserving Range Queries
Preserving privacy
A compromised storage node cannot gain information from sensor collected data and sink issued queries
A storage node can perform query processing
Preserving integrity
The sink can detect whether a query result from a storage node
includes forged data items
excludes any data items that satisfy the query
Privacy Preserving Scheme
To protect the privacy of sensor collected data
Encrypt each data item individually
How does a storage node process a query over encrypted data?
Using prefix membership verification technique
Contributions
Propose a novel privacy and integrity preserving range query protocol for two-tiered sensor networks
Propose an optimization technique using Bloom filters to significantly reduce the communication cost between sensors and storage nodes
Propose a solution for event-driven sensor networks