Key Agreement in Dynamic Peer Groups
IEEE Transactions on Parallel and Distributed Systems
Group communication specifications: a comprehensive study
ACM Computing Surveys (CSUR)
The SecureRing group communication system
ACM Transactions on Information and System Security (TISSEC)
| Hi-index | 0.00 |
A secure reliable multicast protocol enables a process to send a message to a group of recipients such that all honest destinations receive the same message, despite the malicious efforts of fewer than a third of them, including the sender. This has been shown to be a useful tool in building secure distributed services, albeit with a cost that typically grows linearly with the size of the system. For very large networks, for which such a cost may be too prohibitive, we present two approaches for bringing the cost down: First, we show a protocol whose cost is on the order of the number of tolerated failures. Secondly, we show how relaxing the consistency requirement to a selected probability level of guarantee can bring down the associated cost to a constant.