GDPR: Legitimate interest

Legitimate interest is a common legal basis for camera systems protecting property and people's safety. It does not mean cameras can be placed anywhere without limits; necessity and proportionality must be demonstrated.

What must be defensible

• Purpose: specific security reason (not “just in case”).
• Nezbytnost: that the same goal cannot be achieved less invasively.
• Adequacy: that the impact on privacy is not exaggerated.

In practice it is documented via balance test.