In　a　wireless　mesh　network,　the　need　for　cooperation　among　wireless　nodes　to　relay　each　other＇s　packets　exposes　the　network　to　a　wide　range　of　security　threats.　A　particularly　devastating　type　of　threats　is　the　so-called　wormhole　attacks.　In　order　to　defense　against　the　attack,　a　type　of　wormhole　attack　model　and　a　watch　nodes-based　wormhole　attack　detection　scheme　were　presented　in　this　paper.　The　scheme　that　is　based　on　the　combination　of　a　number　of　techniques,　such　as　distributed　voting,　watch　nodes　based　detection　and　identity-based　cryptosystem.　Qualitative　analysis　and　simulation　show　that　the　wormhole　attack　detection　scheme　is　more　advantageous　over　the　some　of　the　previous　schemes　in　terms　of　performance　and　cost.