The　encryption　and　signature　schemes　based　on　traditional　public　key　are　no　longer　applicable　for　devices　with　limited　hardware　and　software　resources　in　the　Internet　of　Things　(IoT),　since　those　schemes　consume　too　much　hardware　and　software.　To　ensure　the　security　and　efficiency　of　data　transmission,　we　construct　a　secure　and　lightweight　certificateless　hybrid　signcryption　scheme　for　Compared　with　the　existing　schemes,　this　scheme　only　needs　one　bilinear　calculation　for　one　communication,　which　is　computationally　efficient　for　protecting　the　secure　communication　between　nodes　with　limited　resources　in　IoT.　To　meet　the　security　requirements　of　the　complex　IoT,　based　on　difficult　problem　assumption　of　bilinear　pairings,　this　scheme　can　simultaneously　meet　security　requirements　of　the　IoT　such　as　confidentiality,　unforgability,　semipublic　verification,　forward　security　known　session-specific　temporary　information　security.　In　addition,　we　prove　the　security　and　correctness　of　this　scheme　in　Random　Oracle　Model　(ROM).　(C)　2021　Elsevier　B.V.　All　rights　reserved.