A Consensus Algorithm Based on Risk Assessment Model for Permissioned Blockchain

Table 13

Comparisons between two types of consensus algorithm in blockchain.

Consensus algorithms	Complexity of consensus	Crash fault tolerance	Byzantine fault tolerance	Sybil attack	Targeted attack
PBFT		33%	33%	Vulnerable	Vulnerable
Tendermint BFT		33%	33%	Vulnerable	Vulnerable
RAFT		33%	/	Vulnerable	Vulnerable
CRAFT		51%	51%	/	Vulnerable
Beh-Raft		51%	51%	Safe	/
RAC		51%	51%	Safe	Safe