Low-cost interconnected devices, so-called Internet-of-Things (IoT), commonly have no dedicated or posses insufficient hardware security features. This is challenging, as IoT devices are becoming an integral part of critical infrastructures providing much needed additional functionality but also creating a significant security threat to the infrastructure. Due to the scale of IoT integration in critical infrastructures, a key issue in initial deployment and replacing of the devices is often the cost. RESCURE delivers a low-cost IoT security solution based on unique hardware anchors. More precisely, we are using PUFs (Physical Unclonable Function) technology based on SRAM (Static Random-Access Memory), which provides a unique and unclonable identifier as well as a root key for each device. As SRAM-PUFs-based approaches require no additional specialized hardware, it also presents a viable approach of retrofitting existing embedded devices already used.