The European Union Agency for Cybersecurity (ENISA) released its report on pseudonymisation for personal data protection. The report aims to support data controllers and processors in implementing the technique. There is no one-size-fits-all pseudonymisation technique, a high level of competence is needed to reduce threats and maintain efficiency in processing such data across different scenarios. An in-depth look into the context of personal data processing before data pseudonymisation is applied. A thorough security and data protection risk assessment should be combined with a thorough risk assessment.
Source: https://www.helpnetsecurity.com/2021/02/04/pseudonymisation-protect-personal-data/