We present a protocol that is analytically grounded, yet also achieves real world goals, such as simplicity, fairness and minimal resource usage. We base our flow control protocol on the Cost-Benefit algorithmic framework for resource management. This produces control traffic proportional only to the number of overlay network links and independent of the number of groups. We show the effectiveness of the resulting protocol through simulations and live Internet experiments. Exploring Robustness in Group Key Agreement ps , ps.gz , pdf .
Key agreement is a critical part of providing security services for group communication systems.
Most of the current contributory key agreement protocols are not designed to tolerate failures and membership changes during execution. In this paper we present the first robust contributory key agreement protocols resilient to any sequence of events while preserving the group communication membership and ordering guarantees. The Cost of Adding Security Services to Group Communication Systems ps , ps.gz , pdf . Cristina Nita-Rotaru Numerous applications requiring information delivery from one sender to many receivers are based on a group communication model. Group communication systems are used in industry and military systems where reliability and high-availability are required.