The ENISA SCRATCh project aims for a beter IoT security, by making it more easier to create safe IoT devices. A overview of the State of the Art (SotA) is a good starting point. In the Project AnyWi created a databse with an overview of the main standsards and research done by organisations like ENISA, ESCO, OWASP. ETSI.
Meer hier https://www.anywi.com/