Algorithm 1 Reputation value calculation algorithm for nodes based on PageRank
Input:  nodes
Output:  PRx
1:		for $i=0\to n-1$ in nodes do      //Traverse the nodes in the network
2:		if nodei.getCredit()<60:           //Nodes are malicious nodes
3:		nodes = nodes − nodei          //Eliminate malicious nodes
4:		continue                           //Go to the next cycle
5:		end if
6:		reputationx = crediti/votei   //Trust given by node i to node x
7:		PRx = PRx + reputationx     //Calculate the reputation value obtained by node x from other nodes
8:		end for
9:		return PRx