Trusted　transmission　of　data　in　sensing　layer　is　the　basis　of　security　of　Internet　of　Things　so　in　data　transmission　process　the　trust　of　sensing　node　needs　real-time　confirmation　and　the　track　of　the　node　is　also　needed.　But　the　most　current　remote　attestation　mechanisms　cannot　achieve　real-time　trust　attestation　of　sensing　nodes　and　cannot　track　the　node,　if　the　node　is　an　untrusted　one,　and　these　mechanisms　also　have　poor　environmental　adaptability,　so　the　current　remote　attestation　mechanisms　are　not　suitable　for　the　sensing　layer　nodes　in　the　Internet　of　Things.　To　solve　the　above　problems,　a　remote　attestation　mechanism　for　the　sensing　layer　nodes　in　the　Internet　of　Things　is　presented　in　this　paper.　Firstly,　the　formal　description　of　the　sensor　nodes　is　given;　secondly,　based　on　the　formal　description,　a　real-time　trust　measurement　for　the　sensing　nodes　is　proposed　and　the　real-time　trust　measurement　for　the　sensing　nodes　is　realized;　thirdly　by　encapsulating　the　properties　and　trust　value　of　sensing　node,　the　real-time　tracing　of　the　trust　of　nodes　are　realized　in　data　transmission　process.　The　security　of　this　mechanism　is　proved　in　the　standard　model,　meanwhile,　this　mechanism　will　not　expose　the　privacy　of　nodes　in　the　process　of　attestation,　and　it　can　trace　the　untrusted　nodes.　The　simulation　experiment　shows　that　this　mechanism　can　resist　the　attacks　to　the　sensing　nodes　and　can　effectively　improve　the　trust　rate　of　data　transmission,　and　this　mechanism　has　good　dynamic　adaptability　to　network　environment.　This　mechanism　is　simple　and　efficient,　meanwhile　the　mechanism　is　flexible　and　easy　to　implement.　(C)　2017　Elsevier　B.V.　All　rights　reserved.