In　the　context　of　Internet　of　Things　(IoT),　multiple　cooperative　nodes　in　wireless　sensor　networks　(WSNs)　can　be　used　to　monitor　an　event,　jointly　generate　a　report　and　then　send　it　to　one　or　more　Internet　nodes　for　further　processing.　A　primary　security　requirement　in　such　applications　is　that　every　event　data　report　be　authenticated　to　intended　Internet　users　and　effectively　filtered　on　its　way　to　the　Internet　users　to　realize　the　security　of　data　collection　and　transmission　from　the　WSN.　However,　most　present　schemes　developed　for　WSNs　don＇t　consider　the　Internet　scenario　while　traditional　mechanisms　developed　for　the　Internet　are　not　suitable　due　to　the　resource　constraint　of　sensor　nodes.　In　this　paper,　we　propose　a　scheme,　which　we　refer　to　as　Data　Authentication　and　En-route　Filtering　(DAEF),　for　WSNs　in　the　context　of　IoT.　In　DAEF,　signature　shares　are　generated　and　distributed　based　on　verifiable　secret　sharing　cryptography　and　an　efficient　ID-based　signature　algorithm.　Our　security　analysis　shows　that　DAEF　can　defend　against　node　compromise　attacks　as　well　as　denial　of　service　(DoS)　attacks　in　the　form　of　report　disruption　and　selective　forwarding.　We　also　analyze　energy　consumption　to　show　the　advantages　of　DAEF　over　some　comparable　schemes.