Atul Singh Tathagata Das Petros Maniatis Peter Druschel Timothy Roscoe BFT Protocols Under Fire. 189-204 2008 NSDI http://www.usenix.org/events/nsdi08/tech/full_papers/singh/singh.pdf conf/nsdi/2008 db/conf/nsdi/nsdi2008.html#SinghDMDR08