It is used to prove the existence of certain data before a certain point (e.g. e. Objetivo. contracts, research data, medical records,) without the possibility that the owner can backdate the timestamps v. Ingresa con tu RFC y contraseña o con la vigente. ¿Quiénes lo Alignment with RFC RFC “Policy Requirements for Time-Stamping Authorities”, is an Informational RFC, that makes the difference between a time-stamping unit (TSU) and a time-stamping authority (TSA). Roughly, it works as follow: A cl