Access　control　technology　is　an　important　information　security　technology　to　protect　the　sensitive　information　and　critical　resources　in　computer　system　and　network.　But　traditional　access　control　methods　could　only　respond　to　access　requests　of　users　passively　and　can＇t　meet　the　changing　dynamic　network　environment.　In　order　to　improve　the　ability　to　respond　to　malicious　attacks　and　threats　in　access　control　system,　a　security　mechanism　is　designed,　which　is　suitable　for　access　control,　based　on　non-cooperative　game　theory　in　the　game.　When　the　subject　makes　an　access　request　to　the　object,　there　will　be　a　non-cooperative　game　between　them　to　get　Nash　equilibrium.　Then　the　security　mechanism　will　compare　the　probabilities　in　the　Nash　equilibrium　to　the　setting　thresholds　to　get　the　conclusion　that　whether　to　authorize　the　subject　or　not.　Experiment　proves　the　effectiveness　of　the　security　mechanisms.　©,　2014,　Editorial　Board　of　Journal　on　Communications.　All　right　reserved.