S2KAP: a Self-Stabilizing Group Key Agreement Protocol
Résumé
Self-stabilizing systems can automatically recover from arbitrary state perturbations in finite time. They are therefore well-suited for dynamic, failure prone environments. Group key management is a fundamental task in securing group communications. Several protocols have been proposed to deal with the group key management problem. Unfortunately, most of these protocols lack fault-tolerance, a key feature that makes the protocol robust against faults and real network conditions. In this paper, we develop a self-stabilizing key management protocol. The protocol extends a tree based key agreement protocol. It is fully distributed and completes even when the networks contain multiple failures.