Privacy Policy

1. Data Controller

2. Overview of Data Processing

This website collects and processes personal data only to the extent necessary. The processing of personal data regularly takes place only with the consent of the user or when processing is permitted by law.

3. Hosting

This website is hosted on a server in Germany. The hosting provider is:

Hetzner Online GmbH, Industriestr. 25, 91710 Gunzenhausen, Germany

We have concluded a data processing agreement (DPA) with Hetzner Online GmbH. The hosting provider automatically collects and stores information in so-called server log files, which your browser automatically transmits. Server log files are automatically deleted after 7 days.

Data processing is based on Art. 6 para. 1 lit. f GDPR. Our legitimate interest lies in providing and securing our website.

4. General Data Collection

Server Log Files

The following data is automatically collected each time you access our website:

• Browser type and version
• Operating system used
• Referrer URL (the previously visited page)
• Time of the server request
• IP address (anonymized)

This data is not combined with other data sources. Collection is based on Art. 6 para. 1 lit. f GDPR.

5. Cookies

This website does not use tracking cookies. No cookies are set that serve to track users across websites.

We use your browser's local storage (localStorage) to save your reading progress. This data does not leave your browser and is not transmitted to any server.

6. Contact

If you contact us by email, your details including the contact information you provide will be stored by us for the purpose of processing the inquiry and in case of follow-up questions.

Processing is based on Art. 6 para. 1 lit. b GDPR (contract initiation) or Art. 6 para. 1 lit. f GDPR (legitimate interest in responding to your inquiry).

7. Web Analytics (Umami)

This website uses Umami, a privacy-friendly, self-hosted web analytics tool. Umami does not collect personal data and does not use cookies.

The following anonymized data is collected: page views, time on page, referrer URL, device and browser used (anonymized), country (based on anonymized IP). No IP addresses are stored, no cookies are set, and no cross-device tracking is performed. Data is processed exclusively on our own server in Germany and is not shared with third parties.

Data processing is based on Art. 6 para. 1 lit. f GDPR (legitimate interest in improving our website). You can object to data collection at any time by contacting us at the email address listed above.

8. SSL/TLS Encryption

This website uses SSL/TLS encryption for security reasons. An encrypted connection can be recognized by the browser's address bar changing from "http://" to "https://" and by the lock icon in your browser bar.

9. Your Rights

You have the following rights with regard to your personal data:

• Right of Access (Art. 15 GDPR): You can request information about your personal data processed by us.
• Right to Rectification (Art. 16 GDPR): You can request the correction of inaccurate or the completion of your data stored by us.
• Right to Deletion (Art. 17 GDPR): You can request the deletion of your personal data stored by us, provided no legal retention obligations apply.
• Right to Restriction (Art. 18 GDPR): You can request the restriction of the processing of your personal data.
• Right to Data Portability (Art. 20 GDPR): You can request that we transmit your data in a structured, commonly used, and machine-readable format.
• Right to Object (Art. 21 GDPR): You can object to the processing of your personal data at any time.

10. Right to Lodge a Complaint

You have the right to lodge a complaint with a data protection supervisory authority about the processing of your personal data by us. The competent supervisory authority is:

11. Data Retention

Personal data is deleted as soon as the purpose of storage no longer applies. The following retention periods apply to individual categories:

• Server log files: 7 days
• Contact inquiries without project reference: 1 year
• Analytics data (Umami): anonymized, indefinite

12. Changes to This Privacy Policy

We reserve the right to adapt this privacy policy so that it always complies with current legal requirements or to implement changes to our services in the privacy policy. The new privacy policy will apply to your next visit.

Last updated: February 2026