Secure Group Key Agreement with Node Authentication

Group key is used to provide the confidentiality among the group members. Flexible Robust Group Key Agreement scheme has been proposed, in which users contribute to generate the group key. However, it doesn't authenticate the members of the group when data arrives. Previously Efficient Authentication Protocol for Virtual Subnet has been proposed. However, there is no group key agreement phase in it. In this paper, group key agreement with node authentication scheme has been proposed. It's a modified version which combines the features and merits of both Flexible Robust Group Key Agreement as well as Efficient Authentication Protocol for Virtual Subnet protocol. The main advantage of proposed scheme is that it eliminates the need to send the separate parameters for authentication as well as group key contribution.