Handle the Incident

Personal Data Breaches Under GDPR: Assess, Notify, Recover

How to recognise a personal data breach, assess the risk to people, notify IMY within 72 hours and decide when to tell the people affected.

11 kapitel 66 min Publicerad 5 oktober 2026
Kapitel

Utforska GDPR-guiden

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What counts as a personal data breach

A personal data breach is any security incident that leads to personal data being lost, destroyed, changed, disclosed or accessed without authority.

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Confidentiality, integrity and availability breaches

Breaches fall into three types, and one incident can be more than one.

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Assessing risk to individuals

The risk to the people affected decides whether you must notify IMY and the individuals.

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Notifying IMY within 72 hours

Breaches likely to result in a risk to people must be reported to IMY within 72 hours of becoming aware.

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When you must tell the people affected

If the breach is likely to result in a high risk, you must also inform the people affected without undue delay.

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Processors, controllers and who reports

Controllers report to IMY. Processors must tell the controller without undue delay.

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Documenting every breach in your register

All breaches must be documented, including those you decide not to report.

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Common breach scenarios and how to handle them

Most breaches follow a few familiar patterns.

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Breaches involving a ransomware attack

Ransomware is usually a personal data breach, especially when data was stolen.

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Coordinating GDPR with NIS2 reporting

One incident can trigger both GDPR and NIS2 reports, to different authorities on different clocks.

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Reducing the chance of the next breach

Each breach shows where controls or routines can improve.

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Kostnadsfri checklista

Check Your Breach Readiness

Review your breach routine against GDPR Articles 33 and 34 and get the checklist in your inbox.

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