Provable Secure Constant-Round Group Key Agreement Protocol based on Secret SharingGroup Key Agreement Protocol • June 4th, 2013
Contract Type FiledJune 4th, 2013Abstract. Group Key Agreement (GKA) allows multiple users to col- laboratively compute a common secret key. Motivated by the very few existing GKA protocols based on secret sharing with formal security proofs, we propose a new method to build such protocols. We base our construction on secret n-sharing, an untraditional perspective of secret sharing that brings several advantages. Our proposal achieves better se- curity than the existing work while it maintains a constant number of communication rounds regardless the group size.