Power system security tag based mandatory access control method

The invention relates to a power system security tag based mandatory access control method. According to the control method, a double control system is formed by combining a security tag determining system in a power production control system with a credible calculation password platform for double determination of system access requests, and a double-backup double-safety mandatory access control system is established. The control method overcomes potential safety hazard that a security tag system of the conventional power production control system faces, prevents authority exceeding access, and has low possibility of being bypassed.