Pseudonymous means there are appropriate technical and operational processes within the organization using the identifier to keep this identifier separate from an individual’s identity. Pseudonymous information is one form of Personal Data.
“Pseudonymize” or “Pseudonymization” means the processing personal data such that the information no longer attributable to a specific individual without the use of additional information, provided that the additional information is kept separately and is subject to technical and organizational measures to ensure that this information is not subsequently mapped to an identifiable individual. Pseudonymization of personal data can reduce risks to data subjects and help controllers meet data-protection obligations. (GDPR Recital 28).