A Consensus Algorithm Based on Risk Assessment Model for Permissioned Blockchain

Table 4

The evaluation system of consensus algorithm.

Sl. No.	Criteria	Sub-indicators	Description
1	Decentralization	Number of consensus nodes	The number of nodes in the blockchain network that can become the accountant node.
2		Accountant selection method	The method that accountant node is generated in the blockchain network, competition, election, or polling.
3		Consensus nodes weight	Whether the consensus nodes have equal probability of becoming the accountant node in each consensus process.
4	Security	Byzantine fault tolerance	The maximum percentage of Byzantine malicious nodes in the whole blockchain network that can be accepted.
5		Byzantine node controllability	The ability of consensus algorithm to exclude malicious nodes from the consensus process
6		Attack behavior costs	The cost of an attack behavior by a malicious attacker in the blockchain network
7	Scalability	Resource consumption	Resources to be consumed in the consensus process include computation, storage, and network communication, which can be measured by the communication complexity of consensus.