Oracle Solaris Trusted Extensions Administrator's Procedures

Account Label Range

When you assign a clearance and a minimum label to a user, you define the upper and lower boundaries of the account label range in which that user is permitted to operate. The following equation describes the account label range, using ≤ to indicate “dominated by or the same as”:

minimum label ≤ permitted label ≤ clearance

Thus, the user is permitted to operate at any label that is dominated by the clearance as long as that label dominates the minimum label. When a user's clearance or minimum label is not expressly set, the defaults that are defined in the label_encodings file take effect.

Users can be assigned a clearance and a minimum label that enable them to operate at more than one label, or at a single label. When a user's clearance and minimum label are equal, the user can operate at only one label.