4.3.1. Identification, authentication and signature. Cl@ve PIN

The Tax Agency participated in the design and implementation of the Cl@ve system, a common platform of the State Administrative Public Sector for identification, authentication and electronic signature through the use of private keys. One of the identification and authentication mechanisms offered by the platform is Cl@ve PIN, launched by the Tax Agency, with 11,189,611 taxpayers registered in this system as of December 31, 2020.