A computer-implemented system for authorizing access to one or more smart devices provided in a local environment is disclosed herein. The system comprises a client device, a local network node, and a remote network node. The remote network node is configured generate a link and send it to an address associated with a personal identifier of the client device, and in response to the client device having executed the link, the client device being configured to receive an authorization code. The authorization code is locally or remotely validated based on a challenge previously generated by the client device. An access token is generated and sent to the client device, thereby authorizing the client device access to the one or more smart devices in the local environment.