Technical Report CS0634

TR#:CS0634
Class:CS
Title: THE BEST OF BOTH WORLDS: GUARANTEEING TERMINATION IN FAST RANDOMIZED BYZANTINE AGREEMENT PROTOCOLS
Authors: O. Goldreich and E. Petrank
PDFCS0634.pdf
Abstract: All known fast randomized Byzantine Agreement (BA) protocols have (rare) infinite runs. We present a method of combining a randomized BA protocol of a certain class with any detenninistic BA protocol to obtain a randomized protocol which preserves the expected average complexity of the randomized protocol while guaranteeing tennination in all runs. In panicular, we obtain a randomized BA protocol with constant expected time which always tenninate within t +0 (log t) rounds, where t =0 (n) is the number offaulty processors.
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