New key management scheme based on pool-hash for WSN and IoT

Abstract

The Internet of Things (IoT) brings together the applications linking many devices to the Internet to make the environment more “smart”. Uses vary from the human scale, from housing (Smart Home) to that of the city (Smart Cities), transport and industry. Wireless sensor networks (WSNs), which are a sub-part of the IoT, have attracted a lot of interest over lasts years in security to ensure the integrity, the authenticity and the data confidentiality. Due to the deployment of nodes in remote areas, the solution brought to the wireless sensor network to increase the information security consists to protect the messages exchanged between nodes. In the paper, we propose a new key management protocol called the Key management scheme based on pool-hash, for the establishment of new key types. We present the modification of the proposed scheme to that of the basic scheme by detailing the different phases of key management. Modification exposes a new key pool contains original keys and other hashed admit the same identities thus new session keys transmitted between sensors nodes are defined during the discovery and path key phases. Then, we specify and formalize this protocol using a mathematical concept to model the probability of connectivity and resilience against node capture. The experimental results prove that the proposed scheme is adapted to the WSN applications in terms of connectivity and resiliency.