Article 24 of the GDPR requires a controller to implement appropriate technical and organizational measures to protect personal data. “Appropriate” does not mean a fixed checklist. It means the safeguards must fit the processing activity, the sensitivity of the data, the systems in use, and the risks to individuals. In practice, this pushes organizations to make and document risk-based decisions rather than rely on generic policies.
In cyber security, Article 24 matters because it turns privacy compliance into an operational control problem. A controller should be able to explain why specific measures were chosen, such as access control, encryption, logging, vendor oversight, training, or review of data flows. It also supports ongoing defense: when systems, vendors, or processing purposes change, the organization should revisit its controls. If it cannot show that its safeguards were appropriate, it may fail the GDPR’s accountability requirement even if paperwork exists.