For further information, visit www.audiciaux.fr, www.scobex-rgpd-dpo.fr and www.dpo-externe-rgpd-france.fr. ISO 27400 is the benchmark standard for securing the Internet of Things (IoT). This work guides organisations in its implementation: understanding requirements, risk management, securing connected devices and regulatory compliance. It helps ensure data protection and strengthen the resilience of IoT infrastructures.