Introduction
Germany’s BSI (Federal Office for Information Security) is responsible for identifying and managing Critical Infrastructures (KRITIS) that are vital for public safety.
Critical infrastructure operators must prove to the BSI every two years that their IT security is up to date.
Maturity Level Definitions
Compliance with these requirements is evaluated through an audit based on the following maturity model:
- Maturity level 1: An ISMS / BCMS is planned but not yet established.
- Maturity level 2: An ISMS / BCMS is largely established.
- Maturity level 3: An ISMS / BCMS is established and documented.
- Maturity level 4: In addition to maturity level 3, the ISMS / BCMS was regularly reviewed for effectiveness.
- Maturity level 5: In addition to maturity level 4, the ISMS / BCMS was regularly improved.
The BSI publishes a summary of KRITIS audit results in its KRITIS in Zahlen page. It’s a great initiative to bringing transparency and I wish government agencies across the world adopt this best practice.
You can find information about the official definition of these maturity levels here.
Infographic
The BSI publishes a summary of KRITIS audit results in its KRITIS in Zahlen page. After reviewing the data, I created an infographic (focused on ISMS maturity levels) based on this information:

My 2 Cents
- The Maturity Levels are pretty straightforward
- IT & Telecom, Finance & Insurance and Water have a good percentage of entities in the highest level: Level 5
- Transport & Traffic appears to be lagging
- Water and IT & Telecom seem to have the highest sectoral average1
How You Can Use This
You can use adopt the same Maturity level definitions for your individual controls… something like:
- Maturity level 1: Control is planned but not yet implemented.
- Maturity level 2: Control is largely implemented.
- Maturity level 3: Control is implemented and documented.
- Maturity level 4: In addition to maturity level 3, the control is regularly reviewed for effectiveness.
- Maturity level 5: In addition to maturity level 4, the control is regularly improved.
If you have a Cybersecurity Maturity program, you get a sense of where you are in comparison to these sectors, especially in Germany.
Dataset
I extracted data from the BSI site into Excel for analysis. Feel free to download it for your own use.
- This is from my own calculation. BSI does not do any sectoral averages. ↩︎