crash fault-tolerant protocols,

e.g., Paxos [27], guarantee safety (consistency) in an asynchronous network using 2f+1 nodes to overcome the simultaneous crash failure of any f nodes

在使用2f + 1个节点的异步网络中确保安全性（一致性），以克服任何f个节点的同时崩溃失败

 

 

Byzantine fault-tolerant protocols,

e.g., PBFT [13], 3f+1 nodes are needed to provide safety in the presence of f malicious nodes.

需要3f + 1个节点以在存在f个恶意节点的情况下提供安全性。