Efficient and DoS-resistant Consensus for Permissioned Blockchains.

摘要: Existing permissioned blockchain systems designate a fixed and explicit group of committee nodes to run consensus protocol that confirms the same sequence blocks among all nodes. Unfortunately, when such runs in large scale on Internet, these can be easily turned down by denial-of-service (DoS) or network partition attacks. Although work proposes scalable BFT protocols larger number nodes, their efficiency drops dramatically only small are attacked. In this paper, our EGES leverages Intel SGX develop new abstraction called "stealth committee", which effectively hides into pool fake selects distinct stealth for each block with overwhelming probability. Evaluation typical geo-distributed settings shows that: (1)EGES is first blockchain's tolerate tough DoS attacks; (2) achieves comparable throughput latency as existing blockchains'