Privacy by design
Privacy by design calls for the inclusion of data protection from the onset of the designing of systems, rather than an addition. More specifically - "The Controller shall implement appropriate technical and organisational measures in an effective way in order to meet the requirements of this Regulation and protect the rights of data subjects". Article 23 calls for Controllers to hold and process only the data absolutely necessary for the completion of its duties (data minimisation), as well as limiting the access to personal data to those needing to act out the processing.