Trusted　access　to　the　Internet　of　Things　sensing　layer　node　is　the　precondition　for　the　trusted　operation　of　the　Internet　of　Things.　How　to　quickly　and　accurately　implement　identity　authentication　of　a　sensing　node　is　currently　a　research　hotspot.　After　comprehensive　consideration　of　the　security　requirements　and　functional　requirements　of　the　sensing　Node　Identity　Authentication,　this　paper　proposes　a　fast　identity　authentication　scheme　for　sensing　nodes.　In　the　identification　process　of　sensing　nodes,　the　data　aggregation　node　is　responsible　for　the　selection　of　system　parameters　and　the　registration　of　sensing　nodes.　It　does　not　directly　participate　in　the　authentication　process　and　simplifies　the　authentication　process.　The　computational　efficiency　is　high,　and　the　security　analysis　shows　that　the　scheme　has　forward　security　and　can　resist　malicious　attacks　such　as　replay　attacks,　key　information　disclosure　attacks,　and　forgery　attacks.　Also,　the　solution　supports　key　updates.　Computational　complexity　analysis　shows　that　this　protocol　uses　only　a　small　amount　of　computational　complexity　in　exchange　for　higher　security　and　more　features.　©　2019,　Springer　Nature　Singapore　Pte　Ltd.