The ENS (Esquema Nacional de Seguridad) is a Spanish certification that was developed as part of Royal Decree 311/2022 on May 3rd 2022. Royal Decree 311/2022 was published in accordance to the earlier Spanish decrees, Royal Decree 3/2010 and Royal Decree 421/2004, which provided the National Cryptologic Centre the functionality to create and disseminate the standards, guides, and recommendations relating to information security.
The current ENS standard was designed and released by the Spanish National Cryptologic Centre and establishes security measures that service providers must adhere to so Spanish government agencies and customers meet the requirements set forth by Royal Decree 311/2022.