WMNs　(Wireless　Mesh　Networks)　are　a　new　wireless　broadband　network　structure　based　completely　on　IP　technologies　and　have　rapidly　become　a　broadband　access　measure　to　offer　high　capacity,　high　speed　and　wide　coverage.　Trusted　handoff　in　WMNs　requires　that　mobile　nodes　complete　access　authentication　not　only　with　a　short　delay,　but　also　with　the　security　protection　for　the　mobile　nodes　as　well　as　the　handoff　network.　In　this　paper,　we　propose　a　trusted　handoff　protocol　based　on　several　technologies,　such　as　hierarchical　network　model,　ECC　(Elliptic　Curve　Cryptography),　trust　evaluation　and　gray　relevance　analysis.　In　the　protocol,　the　mobile　platform＇s　configuration　must　be　measured　before　access　to　the　handoff　network　can　proceed　and　only　those　platforms　whose　configuration　meets　the　security　requirements　can　be　allowed　to　access　the　network.　We　also　verify　the　security　properties　through　formal　analysis　based　on　an　enhanced　Strand　model　and　evaluate　the　performance　of　the　proposed　protocol　through　simulation　to　show　that　our　protocol　is　more　advantageous　than　the　EMSA　(Efficient　Mesh　Security　Association)　authentication　scheme　in　terms　of　success　rate　and　average　delay.　(C)　2013　Elsevier　B.V.　All　rights　reserved.