With　the　development　of　ad　hoc　networks,　it　is　one　of　the　most　important　problems　to　protect　the　security　of　information　flows　between　the　nodes.　The　paper　applies　the　technique　of　trusted　computing　to　designing　the　Trust　Extended　Dynamic　(TED)　security　model.　TED　model　protects　the　security　of　information　flows　between　the　nodes　built　on　trusted　platforms.　The　security　model　is　based　on　BLP　and　Biba　models.　Due　to　introducing　the　concept　of　reliability　and　the　functions　for　the　trustworthy　state　measurements,　the　trustworthiness　of　subjects　and　some　objects　is　monitored,　and　the　accessing　ranges　of　subjects　are　adjusted　at　runtime.　Through　these　means,　the　ability　of　TED　security　model　to　resist　running　attacks　is　enhanced.　The　formal　description　of　TED　model　is　specified　in　detail,　and　its　security　properties　are　described.　The　paper　also　introduces　the　application　of　the　model　in　the　Trusted　Web　Server　(TWS).　©　Springer-Verlag　Berlin　Heidelberg　2006.