Efficient Protection Mechanism Based on Self-Adaptive Decision for Communication Networks of Autonomous Vehicles

Algorithm 2

The algorithm of the efficient response.

	For all Ri detected in a TSW
	Calculate AC using equation (4)
	Calculate NPA by equation (5)
	Assign AC level based on calculated AC
	Assign NPA level based on calculated NPA
	Search CVN execution table (Table 1) using AC and NPA levels and identify intrusion responding behavior (RB)
	If (RB == full isolation)
	MVN adds the Ri into blacklists and broadcasts AP with RB = full isolation
	Then If Ri receives packet from Rj
	If Rj is in blacklist list of Ri, ignore and delete all packets queued from Rj
	Else: handle and process packet
	End If
	End If
	Else If (RB == attacker bypass)
	MVN momently blacklists Ri and broadcasts AP with RB = attacker bypass
	Then If Rj is in moment blacklist list of Ri
	If Ri receives data packet from Rj, ignore and delete RREQ, RREP, and RERR packets from Rj
	End If
	If Ri receives data packet from Rj destined for Rk.
	Ri forwards data packets to Rk
	End If
	Rj deletes route including Rj from its route table
	Else: handle and process packet
	End If
	End If
	Else MVN sets RB to no punishment
	End If
	End If
	End If