A Novel Semifragile Consensus Algorithm Based on Credit Space for Consortium Blockchain

Algorithm 3

Punishment algorithm for malicious nodes.

Input: U (the set of malicious nodes)
Output: prisonArray (prison layer array)
(1)	prisonArray[] = {}; //Initialize the prsion layer
(2)	while (node in U)
(3)	if JudgeMalicious (node) //Determine whether the node is malicious
(4)	time = pow (e, x); //Calculate penalty time
(5)	insert (node, prisonArray, time); //Put the node in jail and record the punishment time
(6)	node++; //Pointer moved to the next malicious node
(7)	continue;
(8)	end if
(9)	if JudgeTimeOut (node) //Determines whether the node penalty time expires
(10)	if (maliciousCount ≤ 2) //Determines whether the node is a malicious node
(11)	remove (node, prisonArray); //Remove the node
(12)	node++; //Pointer moved to the next malicious node
(13)	continue;
(14)	else
(15)	stayPrison (node); //Leave the node in the prison layer
(16)	node++; //Pointer moved to the next malicious node
(17)	continue;
(18)	end if
(19)	end if
(20)	end while