An Efficient Group-based Authentication and Key Agreement Protocol in the Internet of Things environment

Considering the increasing expansion of the Internet of Things (IoT) applications and the limitation of end devices in energy resources, sending/receiving fewer data in order to reduce energy consumption is essential. The authentication and key agreement in the IoT networks face many important challenges, most of which are the high computational overhead of existing group key agreements, having negative impacts on network performance. In this paper, we propose an authentication and key agreement protocol that support group communication and uses the Chebyshev polynomial in its calculations, which compare to linear pairing and elliptic curve cryptography, while having enough security, imposes less overhead on the IoT networks. Our proposed protocol is a good option for use in IoT applications including home automation, smart meters, and vehicular sensor networks. The proposed group authentication improves the efficiency of communication compared to other similar protocols and is resistant to various types of internal and external attacks. The security assessment of the proposed protocol has been done using a Random Oracle Model (ROM) and informally.