This work of thesis is related to the European project called Rainbow. Rainbow aims to provide a secure fog computing platform for managing heterogeneous IoT devices. Fog computing is a cloud infrastructure that consists in devices connecting to a cloud, but instead of forwarding data to the centre of the cloud, much of the processing is done at the edges. In this type of architecture, there are three main actors: Orchestrator, Fog Nodes, TPM(Trusted Platform Module). Since a great number of devices (Fog Nodes) is involved in this scenario, it is important that these devices can always be considered trusted: the process to check their correctness is called Remote Attestation.