IT-Grundschutz: BSI Security Standards
IT-Grundschutz from the Federal Office for Information Security (BSI) provides organisations with a proven methodology for systematically building information security. We guide you from protection needs assessment through modelling with IT-Grundschutz building blocks to ISO 27001 certification on IT-Grundschutz basis.
- ✓Structured approach to IT security using proven methods
- ✓Appropriate security level with proportionate effort
- ✓Fulfillment of regulatory requirements and compliance standards
- ✓Systematic risk analysis and treatment
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What Is IT-Grundschutz?
Our Strengths
- Many years of expertise in applying the IT-Grundschutz methodology
- Experienced BSI-certified IT-Grundschutz practitioners and consultants
- Practical implementation with a focus on cost-effectiveness
- Support for certifications and audits
Expert tip
IT-Grundschutz offers a pragmatic approach to IT security. By combining standard security measures with supplementary risk analyses, even complex IT environments can be secured efficiently.
ADVISORI in Numbers
11+
Years of Experience
120+
Employees
520+
Projects
We follow the proven IT-Grundschutz methodology of the BSI and adapt it to your specific requirements.
Our Approach:
Structural analysis and definition of the information domain
Protection needs assessment for all information and processes
Modeling with IT-Grundschutz building blocks
Basic security check and action planning
Supplementary security analysis for elevated protection needs
"We support our clients in implementing IT-Grundschutz in a structured and pragmatic manner – with the goal of establishing an effective security level while simultaneously laying the foundation for a subsequent ISO 27001 certification. Our expertise combines regulatory requirements with practical implementation – efficient, targeted, and future-proof."
Sarah Richter
Head of Information Security, Cyber Security
Expertise & Experience:
10+ years of experience, CISA, CISM, Lead Auditor, DORA, NIS2, BCM, Cyber and Information Security
Our Services
We offer you tailored solutions for your digital transformation
IT-Grundschutz Modeling
Systematic capture and modeling of your IT landscape in accordance with the IT-Grundschutz methodology.
- Structural analysis and information domain definition
- Protection needs assessment for all assets
- Building block assignment and derivation of measures
- Documentation in accordance with BSI standards
Basic Security Check
Review of current security measures against IT-Grundschutz requirements.
- Systematic review of all relevant building blocks
- Identification of security gaps
- Prioritized recommendations for action
- Roadmap for improving IT security
Our Competencies
Choose the area that fits your requirements
BSI certification requires thorough preparation. We guide you through the entire audit process — from documentation through on-site audit to follow-up.
Systematic analysis of BSI Grundschutz building blocks is the foundation for effective IT security architecture. We assess and model the right blocks for your information domain.
The BSI IT-Grundschutz Compendium comprises 113 building blocks across 10 topic areas. Grundschutz++ brings digital modernization in 2026.
ISO 27001 certification based on IT-Grundschutz is the highest evidence of information security under BSI standards.
Banks and financial services providers face stringent information security requirements. BaFin mandates through BAIT and MaRisk the implementation of recognized standards such as BSI IT-Grundschutz. We guide financial institutions through structured implementation based on BSI 200-2 — from structural analysis and protection requirements to measure implementation. Our consultants understand the specific demands of financial supervision and combine IT-Grundschutz with BAIT compliance, DORA readiness, and existing ISMS structures.
Successful BSI IT-Grundschutz implementation requires more than technical execution — it needs strategic implementation frameworks that connect IT security requirements with operational excellence, technology innovation, and sustainable business strategy. Professional BSI Grundschutz implementation combines proven implementation methods with effective RegTech solutions for comprehensive IT security systems. We develop end-to-end BSI IT-Grundschutz implementation solutions that not only ensure regulatory compliance, but also increase operational IT security efficiency, enable innovation, and establish sustainable competitive advantages for German companies.
The BSI Grundschutz methodology (BSI 200-2) defines three protection levels. We implement the right approach for your organization.
Risk analysis per BSI 200-3 is mandatory for elevated protection needs. We identify additional threats beyond standard building blocks and develop effective treatment strategies.
We help you connect BSI methodology with the applicable Compendium building blocks: define your information domain, assess protection needs and document implementation gaps, owners and evidence.
More Services in Regulatory Compliance Management
Frequently Asked Questions about IT-Grundschutz BSI
What do BSI standards 200-1, 200-2 and 200-3 cover?
BSI standard 200‑1 defines general requirements for an information security management system (ISMS). BSI standard 200‑2 describes the IT-Grundschutz methodology with three approaches: basic protection, standard protection and core protection. BSI standard 200‑3 governs risk analysis based on IT-Grundschutz when protection needs exceed the normal level. Together they form the methodological foundation for IT-Grundschutz implementation.
What does a typical IT-Grundschutz implementation look like?
Implementation follows a structured process: first, the information domain is defined and a structural analysis is performed. Then protection needs are determined for all identified objects. Next, suitable building blocks from the IT-Grundschutz Compendium are assigned (modelling). The basic security check compares the current state against requirements. Where protection needs are elevated, a supplementary risk analysis per BSI standard 200‑3 follows.
What is the difference between IT-Grundschutz and ISO 27001?
ISO 27001 is an international standard with abstract ISMS requirements. IT-Grundschutz is a concrete BSI methodology that provides detailed measure recommendations via the IT-Grundschutz Compendium. Organisations can obtain ISO 27001 certification on the basis of IT-Grundschutz, combining international recognition with the methodological depth of the BSI approach.
Who benefits most from IT-Grundschutz?
IT-Grundschutz is particularly relevant for German federal authorities and public institutions subject to BSI requirements, critical infrastructure (KRITIS) operators with compliance obligations under the BSI Act, organisations seeking ISO 27001 certification on IT-Grundschutz basis, and any organisation wanting a structured entry into information security.
What is the IT-Grundschutz Compendium?
The IT-Grundschutz Compendium contains over 100 building blocks organised in ten layers, ranging from ISMS processes through organisation and personnel to technical systems such as networks and applications. Each building block describes typical threats and concrete security measure requirements. The BSI updates the Compendium annually to address current threats and technologies.
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