Design and Implementation of the Zero Trust Model in the Power Internet of Things

Table 3

The set of places and transitions in the ZTM SPN model.

Places	Define	Transitions	Define
	Normal status		Attacks the terminal
	The software is under attack		Software authenticates periodically
	The hardware is under attack		Hardware authenticates periodically
	The malware is in interactive status		The malware sends data
	The malicious hardware or the user is in an interactive state		The malicious hardware sends data
	The software is abnormal		Authenticates
	The hardware or the user is abnormal		Access is blocked
	System administrator		Updates the policy