Ensuring reliability and freshness for Data Aggregation inWireless Sensor Networks

The emergence of senor node architecture with its advance capabilities to control the different hardware units and its enhancements in low power and affordable computational devices has made sensor networks from dream to reality. Sensor networks are deployed in widespread targeted areas where they can work for many years and can sense the environment behavior and its different variables without any need to externally charge their installed batteries, the security in sensor networks has become most important aspect along with low power, as the sensors are unattended so there is more possibility of attack in WSN than usual computer networks. Data aggregation security is an important task as if some false node injects a highly odd data values it will highly effect the whole aggregation process. The paper reviews the need of security for data aggregation and propose an architecture which eliminates the false values injection as well as it provides end to end reliability and data freshness, the architecture is also energy optimized.