Kumaran Vijayasankar

Nonce-based authenticated key establishment over OAuth 2.0 IoT proof-of-possession architecture

The Internet of Things will scale to billions of devices in the next coming years. A secure communication framework is needed to interconnect all these objects, by taking into account their intrinsic constrained in terms of energy, cpu and memory; Several proposals relying on adapting existing well-known and standardized security solutions exist, but we believe there is still a gap for most-constrained nodes to provide fine-grained authorization and secure establishment of fresh cryptographic keys. We propose a mechanism that runs on top of the OAuth Authorization architecture and provides the bootstrapping of fresh authenticated symmetric cryptographic material between previously unknown parties using a nonce-based protocol. We set up an energy measurement platform to evaluate our proposal and compare it with existing work.

Support for hybrid network in RPL

The Smart Grid is based on Advanced Metering Infrastructure that mostly relies on Narrow Band Power Line Communication (PLC). In such network, using a single communication interface does not fulfill the primary requirement of 99.99% reading rates and coverage. Hybrid communication, by adding an additional radio interface, is a solution to provide the quality of service required by Smart Grid applications. However, dedicated routing protocols usually operate with a single communication technology. In this paper we present three solutions to enhance the IPv6 Routing Protocol for Low-Power and Lossy Networks (RPL) - a well-known routing protocol for smart grid application - for handling multi-interface devices called the Multiple RPL Instances, the Interface Oriented and the Parent Oriented. By means of simulation we show how the network can provide a higher quality of service and a better resilience to failure.

Routing overhead optimization in smart grid networks

This paper presents a routing overhead optimization algorithm called Staggered Link Quality algorithm to reduce routing overhead in large scale smart grid networks that use reactive routing protocols. A reduction in routing overhead will result in higher channel utilization and improved throughput. The proposed algorithm is evaluated over both power line and wireless network through experimental and simulation results. It is shown that the proposed algorithm not only reduces routing overhead but also reduces route discovery time and establishes near optimal paths. Reduction in routing overhead of up to 85% is observed under certain network conditions.

Improving performance in industrial Internet of Things using multi-radio nodes and multiple gateways

IEEE 802.15.4e is emerging as a robust standard for industrial Internet of Things. This standard is particularly effective for low power, multi-hop networks, and typically supports applications with low throughput. However, with the advances in energy harvesting, the need for supporting better performing solutions is also gaining momentum. This paper presents and analyses a modified link scheduling algorithm for IEEE 802.15.4e based solutions. Three approaches are considered. With the first approach, only the gateway node is equipped with multiple radios. With the second approach, non-gateway nodes are equipped with multiple radios as well. With the third approach, multiple single radio gateways are considered. Results from simulations have been presented to demonstrate the improvement in performance compared to the typical single radio, single gateway deployments.