Access　control　is　a　core　security　technology　that　has　been　widely　used　in　computer　systems　and　networks.　In　access　control,　an　object　wants　to　make　sure　that　a　subject　makes　honest　access　and　the　subject　hopes　that　access　requests　will　receive　permissions　from　the　object.　In　this　paper,　we　model　access　control　as　a　repeated　game　between　subject　and　object　and　apply　game　theory　to　authorise　access　requests.　The　purpose　is　to　make　honest　access　to　seek　more　payoffs　for　subject　from　the　access.　The　ultimate　goal　of　applying　the　game　theory　to　access　control　is　to　discourage　dishonest　access　from　subject　so　that　we　can　improve　the　effectiveness　of　access　control,　which　is　achieved　through　deriving　the　conditions　that　would　lead　to　Nash　equilibrium.　We　also　perform　some　experiments　to　demonstrate　the　effectiveness　of　our　gametheory-based　access　control　and　show　its　advantages　over　traditional　access　control　models　as　well.　Copyright　©　2016　Inderscience　Enterprises　Ltd.