English

Abstract

This paper proposes a solution to enhance the key management of Wireless Sensor Networks (WSNs) by integrating blockchain technology with Hierarchical Identity-Based Encryption. The aim is to establish a highly secure WSN structure. The current wireless network is improved by incorporating blockchain technology to increase security and reliability. However, the security of key management in dynamic WSNs is threatened by the vulnerability of untrusted Head Nodes(HN) to attack. The presence of an untrusted HN imposes a heavy burden on the sensors for key management, in addition to the already existing challenges. In order to overcome these issues, blockchain technology has been used to propose a secure key management scheme (BSKM). We offer a secure node movement technique and a safe cluster-building mechanism, with the blockchain acting as a trust machine to replace the major functions of the Head node. We run extensive simulations for security analyses. The findings show that the BSKM scheme is efficient and effective and is more suitable for enhancing the reliability of dynamic WSNs.