Why “Anonymous Data” Might Not Be Anonymous Under GDPR

Introduction

Many companies rely on “anonymous” data but GDPR has a strict definition.

And most data isn’t truly anonymous.

---

1. Pseudonymous ≠ Anonymous

Data is not anonymous if it can be:

• Re-identified

• Linked

• Combined

---

2. Common Examples That Are NOT Anonymous

• IP addresses

• Device IDs

• Analytics identifiers

• Hashed emails

---

3. Re-Identification Risk Matters

If re-identification is reasonably possible, GDPR applies.

---

4. Why This Impacts Consent

If data isn’t anonymous:

• Consent may be required

• Transparency is mandatory

• Users have rights

---

5. Cookiepal Helps Prevent False Assumptions

Cookiepal ensures:

• Cookies are categorized correctly

• Tracking isn’t mislabeled as anonymous

• Transparency stays accurate

---

Final Takeaway

If data can point back to a person — GDPR applies. Cookiepal helps businesses avoid dangerous assumptions about anonymity.

Sources & References

• GDPR Article 4(1) – Personal data
• GDPR Recital 26 – Anonymous data
• ICO Guidance on Anonymisation