GDPR Article 90 — Obligations of secrecy

What this control requires

This control allows Member States to adopt rules for supervisory authorities to reconcile the protection of personal data with professional secrecy obligations. These rules apply only to personal data obtained through activities covered by secrecy obligations and must be necessary and proportionate. This control addresses Specific Situations.

In plain English

This control allows Member States to adopt rules for supervisory authorities to reconcile the protection of personal data with professional secrecy obligations. In practice, this means you can prove you data proportionate-level controls on a defined cadence.

Why it matters

GDPR administrative fines reach the greater of €20 million or 4% of global annual turnover. The European Data Protection Board (EDPB) coordinates supervisory-authority enforcement across the EU/EEA, and DPAs publish enforcement decisions citing specific Articles.

What an auditor looks for

A DPA or privacy auditor expects: a Records of Processing Activities (RoPA) entry, a documented lawful basis, evidence the Article's data-subject right is operationalised end-to-end, a named DPO contact (where required), and Article 30 records that match what the front-end actually does.

Within Chapter IX: Specific Situations, the assessor will trace your implementation back to the catalogue reference (Article Article 90) and look for objective evidence on the latest two assessment cycles.

How to implement

Policy Management

Docs. Keep each policy in version-controlled Markdown alongside the code that implements it; ship a signed PDF snapshot at each annual review and link the SHA into the SoA.

Operational checklist

• Data. Document the trigger, the owner and the cadence.
• Supervisory. Document the trigger, the owner and the cadence.
• Rules. Document the trigger, the owner and the cadence.
• Obligations. Document the trigger, the owner and the cadence.
• Scope: proportionate, situations, secrecy.

Evidence to collect

• Policy Document. A signed and version-controlled policy / standard / procedure document.
• Infra Scan. Continuous infrastructure-posture telemetry — AWS Config, Azure Policy compliance, GCP Organisation Policy, Wiz / Prisma findings.

Signed policy or standard documents the safeguard. Focus: Obligations of secrecy.

Common pitfalls

• Policies that no engineer has read; the version in Confluence drifts from the version that's actually being enforced.

How it maps to other frameworks

Computed from shared tags, control component and key-operation subjects — handy when you are reconciling controls across an audit.

• SOC 2 (2017 TSC) P3.2 — Consent Management for Personal Information Collection
• ISO/IEC 27701:2025 A.1.3.2 — Comply with obligations
• India DPDP Act 2023 DS-005 — Consent Withdrawal Mechanism

Related controls in GDPR

• Article Article 86 — Processing and public access to official documents
• Article Article 88 — Processing in the context of employment
• Article Article 85 — Processing and freedom of expression and information
• Article Article 91 — Existing data protection rules of churches and religious associations
• Article Article 83 — General conditions for imposing administrative fines
• Article Article 89 — Safeguards and derogations relating to processing for archiving purposes in the public interest, scientific or historical research purposes or statistical purposes

References

• European Union — GDPR
• Catalogue identifier: Article Article 90

Topics: governance riskpolicy managementprivacy management