ATGroup has collaborated as an external auditor to the ceremony of renewal of the Root Certificate of ANF-AC. On June 10, ATGroup participated in the ceremony of renewal of the Root Certificate of the ANF-AC certification authority. The root certificate is the origin of the remaining certificates of a certification authority on which the entire system of generation and security of advanced and recognized electronic signatures that can be issued by a recognized certification body is based. The generation of a root certificate must be endowed with a large number of security measures and it is necessary to apply a rigorous generation protocol, which guarantees the integrity and reliability of the final product. The event took place in two phases, one at the headquarters of ANF-AC in its corporate offices in Barcelona, ​​and a second phase, at the secured Data Center, located in the nearby city of Hospitalet del LLobregat. The generation of the root certificate was a success, both for the correct execution of the protocols as well as the effectiveness of the personnel assigned by ANF-AC for such delicate work.