An integrity breach under GDPR refers to the unauthorised or accidental alteration of personal data, compromising its accuracy, completeness, or reliability.

This falls within the broader GDPR definition of a "personal data breach" in Article 4(12), which includes any security incident causing destruction, loss, alteration , unauthorised disclosure, or access to personal data.

Core Definition

GDPR groups breaches into a "CIA triad" (confidentiality, integrity, availability):

  • Integrity breach : Data is tampered with, corrupted, or edited without permission—e.g., a hacker changes medical records or a glitch corrupts customer details, making info unreliable.
  • Unlike confidentiality (leaked data) or availability (lost access), integrity hits accuracy , violating Article 5(1)(d)'s mandate for "accurate and up-to-date" data.

Imagine a retail database where prices or addresses get silently flipped; customers receive wrong orders, eroding trust and triggering fines up to €20M or 4% of global turnover.

Real-World Examples

Breaches often blend types, but here's how integrity stands out:

  • Malicious edit : Cyberattack alters employee salaries in HR systems.
  • Accidental corruption : Software bug overwrites shipping details during migration.
  • Ransomware twist : Attackers encrypt and modify files before demanding payment.

Regulators like the UK's ICO list 20+ cases mixing integrity with others, from misfiled records to hacked databases.

Breach Type| Description| Example Impact
---|---|---
Confidentiality 1| Unauthorised access/disclosure| Data leaked to wrong email
Integrity 3| Unauthorised/accidental alteration| Records corrupted or faked
Availability 5| Loss/destruction of access| Server wipe or fire damage

Reporting & Prevention

Notify authorities within 72 hours if high risk to rights/freedoms; no breach? Still log it.

Prevention tips :

  1. Encrypt data in transit/rest.
  2. Use access controls and audit logs.
  3. Regular backups and integrity checks (e.g., hashing).
  4. Train staff on phishing/software errors.

As of early 2026, trends show rising integrity risks from AI tampering and supply-chain hacks—stay vigilant!

TL;DR : Integrity breach = messed-up data accuracy under GDPR; report fast, prevent with tech + training.

Information gathered from public forums or data available on the internet and portrayed here.