We are the first telecommunications operator to have a certification authority recognised by the European Commission linked to the 5G network for vehicular communications, complying with the requirements of the C-ITS standard. This is thanks to the deployment of a platform based on public key infrastructure (PKI) that allows us to provide batches of anonymous certificates to a vehicle, traffic light, etc. These will enable them to electronically sign the messages they send to the other entities in the V2X collaborative environment. Innovative vehicle identity management models have also been developed with blockchain tracing and 5G cybersecure communications guarantees.