Archive Storage Node Using SAFEQ In Sensor Networks
In the two tiered architecture the storage node acts as midway tier between sensors and a sink, for data storage and
to process the query. By using storage node power and memory of sensors can be saved as well as the processing of query is
efficient. Storage node is attractive to attackers, because the safeQ, a protocol prevents attackers accessing information from
both the sensor collected data and sink issued queries. SafeQ also allows a sink to get the misbehaving compromised node.
To preserve privacy, a novel technique used by SafeQ is to encode both data as well as queries, so that a storage node can
correctly process encoded queries over encoded data without knowing their values. To preserve integrity, we introduce two
schemes such that Merkle hash trees and a new data structure called neighborhood chains. To generate integrity verification
process a sink can use this information to verify whether the result of a query contains exactly the data items that satisfy the
query. The optimization technique called Bloom filters is used to reduce the communication cost between sensors and
storage nodes, and it also improves the performance. The compromised sensors can be avoided by authenticating sensors
with storage node. So that more security can be provided by authentication as well as memory of storage node can be
increased when it is needed by using Archive storage node.