Elliptic Curve Based Dynamic Contributory Group Key Agreement Protocol for Secure Group Communication over Ad-hoc Networks.
Vankamamidi Srinivasa Naresh, Nistala V. E. S. Murthy · International journal of network security · 2015
The aim of this paper is to propose an efficient and simpler Contributory Group Key Agreement protocol (CGKA) based on Elliptic Curve Diffie Hellman (ECDH). In this CGKA protocol, a member acts as a group controller (GC) and forms two-party groups with remaining group members and generates an ECDH-style shared key per each two-party group. It then combines these keys into a single group key and acts as a normal group member. This paper also addresses a Dynamic Contributory Group Key Agreement protocol (DCGKA) by extending CGKA to dynamic groups. The proposed protocol has been compared with other popular DH and ECDH based group key distribution protocols and satisfactory results were obtained.