Chi Ho Robbert van Renesse Mark Bickford Danny Dolev Nysiad: Practical Protocol Transformation to Tolerate Byzantine Failures. 175-188 2008 NSDI http://www.usenix.org/events/nsdi08/tech/full_papers/ho/ho.pdf conf/nsdi/2008 db/conf/nsdi/nsdi2008.html#HoRBD08