BIO: Information Security for the Dutch Public Sector
Establish a sound basis for governmental trust with senior-led audits aligned with the Baseline Informatiebeveiliging Overheid (BIO).
BIO audit and assurance: Dutch Government Baseline Information Security
The BIO (Baseline Informatiebeveiliging Overheid) is the mandatory security baseline for the Dutch government: central government, municipalities, provinces, water authorities, public bodies and joint arrangements. Noordbeek performs BIO audits and assurance engagements, often combined with ISO 27001. Accredited under Dutch Council for Accreditation, C663.
BIO is no longer advice, it is the norm
For Dutch government organisations, information security is not optional. The Baseline Informatiebeveiliging Overheid (BIO) applies to central government, provinces, municipalities and water authorities. Municipalities account for it every year through ENSIA and report to the municipal council. BIO2, is based on ISO/IEC 27001:2022 and 27002:2022, aligns with Article 21 of the NIS2 Directive and is linked to the Dutch Cybersecurity Act. BIO2 also sets explicit requirements for suppliers, so government contracts and tenders pass BIO requirements on to suppliers as well.
Does this sound familiar?
- You are a municipality, province or water authority and the ENSIA deadline is approaching.
- You are a government supplier and ‘BIO compliant’ appears as a tender requirement.
- You already hold ISO 27001 but do not know how BIO fits in.
- Your board / council wants assurance that the annual statement is substantively correct.
What the BIO actually is
The BIO is derived from ISO 27001 and ISO 27002 with government-specific extensions. For each control a basic level (BBN1) or higher level (BBN2 or BBN3) is defined, depending on information classification. Topics include risk analysis and classification, policy and governance, personnel and access, physical security, ICT, suppliers, incidents, continuity and compliance. The BIO aligns with the Dutch open-government act, GDPR and NIS2/Cbw.
Who is BIO relevant for?
- Municipalities (ENSIA, board and council reporting).
- Provinces, water authorities, joint arrangements.
- Ministries, agencies and public bodies.
- Suppliers and SaaS providers serving government clients.
- Implementing organisations holding government data.
What does a BIO audit deliver?
Independent confirmation of the security level towards regulators, board / council and citizens. Evidence for ENSIA annual accountability. Faster approval in government tenders. Clear prioritisation of improvement areas. And a foundation that aligns seamlessly with ISO 27001 and NIS2 for organisations that want to go further.
Why Noordbeek for BIO?
- Accredited under C663 for ISO 27001 and NEN 7510: The foundations the BIO is built on.
- Auditors with government experience: ENSIA, public health audits, provincial audits, Wbni practice.
- Combine BIO with ISO 27001, NIS2 or NEN 7510 in one combined audit.
Integrity as a Foundation for Public Trust
For Dutch government entities and their critical suppliers, the BIO is the unified standard for information security. Maintaining compliance is essential not only for internal governance but for the integrity of the entire intergovernmental network.
An independent audit from Noordbeek provides verified assurance that your organization meets the mandatory security levels (BBN), ensuring the confidentiality, availability, and integrity of public data.
BIO and the Cyberbeveiligingswet (NIS2)
Rigorous BIO Evaluation
Our audits are specifically designed to address the unique structure of the BIO, which builds upon ISO/IEC 27001 while adding mandatory government-specific controls.
BBN Level Alignment
Government-Specific Controls
Interoperability
& Chain Security
Public Sector Expertise from Day One
We move beyond the binary “checklist” approach. Our auditors understand the operational and political sensitivities of the Dutch “Overheid”.
Senior Lead Auditors
Your audit is conducted by professionals with deep experience in governmental informatics and the BIO framework. We eliminate the need for client-led orientation.
Pragmatic Assessment
We focus on the functional effectiveness of your controls within a public sector context. Our goal is to ensure your compliance is technically substantiated and durable.
Independent Governance
To maintain absolute impartiality, certification and assurance decisions are made by our Independent Certification Committee.
Formally Recognized Authority
Noordbeek Certification is an accredited body supervised by the Dutch Accreditation Council (RvA). This oversight ensures that your BIO-aligned audit carries the necessary weight with oversight bodies, intergovernmental partners, and the Ministry of the Interior and Kingdom Relations (BZK).
The Certification Roadmap
Scope & BBN Definition
GAP Analysis (Optional)
Formal Audit
Independent Report
FAQ
Is BIO mandatory?
Yes, for Dutch government. For suppliers it becomes de facto mandatory through tender requirements.
What is the difference between BIO and BIO 2?
BIO 2 is the update closely aligned with the new ISO 27001:2022 and NIS2. The transition runs in phases.
How does BIO relate to ISO 27001?
BIO is based on ISO 27001 with government-specific additions and classification levels. An organisation can demonstrate both at the same time.