NDLI: Proactive recovery in a Byzantine-fault-tolerant system

Content Provider	ACM Digital Library
Author	Castro, Miguel Liskov, Barbara
Abstract	This paper describes an asynchronous state-machine replication system that tolerates Byzantine faults, which can be caused by malicious attacks or software errors. Our system is the first to recover Byzantine-faulty replicas proactively and it performs well because it uses symmetric rather than public-key cryptography for authentication. The recovery mechanism allows us to tolerate any number of faults over the lifetime of the system provided fewer than 1/3 of the replicas become faulty within a window of vulnerability that is small under normal conditions. The window may increase under a denial-of-service attack but we can detect and respond to such attacks. The paper presents results of experiments showing that overall performance is good and that even a small window of vulnerability has little impact on service latency.
File Format	PDF
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2000-10-22
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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Proactive recovery in a Byzantine-fault-tolerant system