A Secure Lightweight Data Aggregation scheme for Cloud assisted IoT

In recent years, cloud assisted IoT has emerged as a revolutionary paradigm enabling the seamless connection of IoT devices to the cloud through the Internet. This new paradigm helps the resource constrained IoT devices to get the benefit of cloud's elastic storage capabilities for storing of their data. However, at the same time it is challenging to ensure low latency, reduced network bandwidth consumption, scalability and energy efficient requirements of different IoT devices while transferring data to the cloud. Hence, to address these issues, fog computing was brought forward as an interplay between the cloud and the IoT. The fog computing is a powerful, decentralized architecture that collects data from IoT devices and transfers it to the cloud. While, fog computing enables us to address some of the issues discussed above, the security and privacy of data still remains to be a major concern. In this paper, we propose a secure lightweight data aggregation scheme for cloud assisted IoT devices based on ElGamal encryption and identity-based signature scheme. The security analysis highlights that our proposed scheme is secure as it prevents the possibility of injection of any kind of false data and keeps a check on data leakages. The performance analysis verifies the efficiency of our scheme against the prevalent schemes.