Research on Access Control Scheme of System Wide Information Management Based on Attribute Association

Table 1

Attribute definition.

Attribute	Attribute classification	Attribute value
Region	Users, resources	Air traffic management area
City	Users, resources	City name
Organization	Users, resources	Organization name
Department	Users	Department name
Position	Users	Position name
Level	Users	User level
Class	Resources	Information class
Urgency	Resources	Urgency fact
Time	Environment	Current time
Network status	Environment	Current network status