GDPR Article 5 — Principles relating to processing of personal data
Personal data shall be:
(a) processed lawfully, fairly and in a transparent manner in relation to the data subject ("lawfulness, fairness and transparency");
(b) collected for specified, explicit and legitimate purposes and not further processed in a manner that is incompatible with those purposes ("purpose limitation");
(c) adequate, relevant and limited to what is necessary in relation to the purposes for which they are processed ("data minimisation");
(d) accurate and, where necessary, kept up to date ("accuracy");
(e) kept in a form which permits identification of data subjects for no longer than is necessary ("storage limitation");
(f) processed in a manner that ensures appropriate security of the personal data ("integrity and confidentiality").