Pseudonymisation consists in transforming personal data so that it can no longer be attributed to a specific individual without the use of additional information, provided that such additional information is kept separately and is subject to technical and organisational measures to ensure that the personal data are not attributed to individual. In practice, it may mean replacing personal data (name, first name, personal number, phone number, etc.) in a data set with indirectly identifying data (alias, sequential number, etc.). Pseudonymised data is still personal data and is subject to the GDPR.

Anonymised data is data that has been rendered anonymous in such a manner that the individual is not or no longer identifiable by any means that are reasonably likely to be used. When the anonymisation is implemented properly, the GDPR no longer applies to the anonymised data.

More information:

• Secure personal data