Computer Science – Cryptography and Security
Scientific paper
1999-08-12
Computer Science
Cryptography and Security
preprint of a paper to appear in the Distributed Computing Journal
Scientific paper
A secure reliable multicast protocol enables a process to send a message to a group of recipients such that all correct destinations receive the same message, despite the malicious efforts of fewer than a third of the total number of processes, including the sender. This has been sh own 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 this is prohibitive, we present two approaches for reducing the cost: 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 probabilistic guarantee can reduce the associated cost, effectively to a constant.
Malkhi Dahlia
Merritt Michael
Rodeh Ohad
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