Lightweight Identity-Based Group Key Agreements Using Extended Chaotic Maps for Wireless Sensor Networks

Group key agreements (GKA) enable a group of sensor nodes in wireless sensor networks (WSNs) to negotiate a common secret key and to establish a secure communication channel using this secret key. Due to hardware limitations, sensor nodes cannot perform heavy computations. Therefore, lightweight authentication schemes for GKA are required in WSNs. This paper presents a novel lightweight identity-based round-efficient GKA scheme for WSNs, which is designed using extended chaotic maps and does not require a trusted authentication server online. Furthermore, based on the proposed GKA scheme, an extended scheme with perfect forward secrecy is developed using the extended chaotic map-based Diffie-Hellman key exchange. Both of the proposed schemes are not only more efficient than related schemes, but also provide more functionality.