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For Internet of Things (IoT) applications, the correct location of sensor node is a very important aspect. To achieve this the solution is quite expensive where it is needed to incorporate Global Positioning System (GPS) adapters in each sensor node. In IoT, majority sensors are small in size and constrained in terms of processing power, memory, battery life etc. So to add a GPS adapter into it is not a feasible solution. Also, GPS adapter cannot be used for indoor IoT applications. To achieve small-size and cost-effective solution, Received Signal Strength Indicator (RSSI) based localization technology is used for distance estimation. The correlation between distance and RSSI values are used to find ranging and localization in IoT. In the era of smart cities, localization is a key component for many applications like smart buildings, traffic management, parking etc. For indoor applications like home automation, GPS is not a practical solution hence RSSI technology is used to achieve correct localization of a sensor node. Many attacks like Wormhole attack, Sinkhole attack, Blackhole attack etc. which are taking place in IoT can be detected by finding the correct location of a sensor node. In this paper, we have used Contiki OS and its inbuilt Cooja simulator to find the expected result. We are using RSSI values to find the location of sensor nodes in given various topologies.

Detection of Security Attack in IoT using Received Signal Strength Indicator