Patent ID: 8510550

Claim:
A method for managing data in a non real-time sensor network, said method comprising the steps of: operating in a network that comprises a multitude of sensor nodes comprised of sensors to sense data, wherein the network is divided into clusters with each cluster including plural sensor nodes, within each cluster, operating one sensor node to act as an aggregator node to aggregate the sensed data of the rest of the sensor nodes of that cluster, and combining a pre-configurable number of neighbored clusters into groups; and persistently storing the data, aggregated within each cluster by the aggregator node of that cluster, in i) the aggregator node of that cluster and ii) in another aggregator node of another cluster of the respective group to provide additional storage, wherein the data is encrypted with homomorphic methods before being persistently stored, wherein the sensors are environment monitoring sensors suitable to measure humidity, water contaminations, and surface temperature.