Privacy Policy

Information about the collection and processing of personal data according to GDPR

1. Data Controller

The data controller responsible for this personal educational website is:

Matthias Wulff

brandung.prionen_51@icloud.com

2. Data Collection and Processing

2.1 Website Usage

When you visit our website, our web server automatically collects certain information:

  • IP address (anonymized)
  • Date and time of access
  • Browser type and version
  • Operating system
  • Referrer URL
  • Pages visited

Legal basis: Art. 6 (1) f GDPR (legitimate interest in ensuring website functionality and security)

2.2 Quantum Error Estimation Tool

Our quantum error estimation tool processes the parameters you input (error rates, qubit numbers, computation depths) locally in your browser or on our server for calculation purposes. This data is not stored permanently and is only used to generate the requested visualizations.

Legal basis: Art. 6 (1) b GDPR (performance of service requested by you)

2.3 Cookies and Local Storage

We use technically necessary cookies and local storage to:

  • Remember your tool settings during your session
  • Ensure proper functionality of interactive elements
  • Store your cookie preferences

Legal basis: Art. 6 (1) f GDPR (legitimate interest in website functionality)

3. Data Retention

We do not store personal data longer than necessary for the purposes outlined in this policy:

  • Server logs: 30 days (for security and performance monitoring)
  • Calculation parameters: Not stored (processed on-demand)
  • Session data: Until browser session ends
  • Cookie preferences: Until you change them or clear browser data

4. Your Rights

Under the GDPR, you have the following rights regarding your personal data:

  • Right of access (Art. 15 GDPR) - Request information about your data
  • Right to rectification (Art. 16 GDPR) - Correct inaccurate data
  • Right to erasure (Art. 17 GDPR) - Request deletion of your data
  • Right to restriction (Art. 18 GDPR) - Limit processing of your data
  • Right to data portability (Art. 20 GDPR) - Receive your data in structured format
  • Right to object (Art. 21 GDPR) - Object to processing based on legitimate interest
  • Right to withdraw consent (Art. 7 (3) GDPR) - Where processing is based on consent

To exercise these rights, please contact us via email as provided in section 1.

5. Data Security

We implement appropriate technical and organizational measures to protect your personal data against unauthorized access, alteration, disclosure, or destruction. Our website uses HTTPS encryption for secure data transmission.

6. Third-Party Services

Currently, we do not use third-party analytics, advertising, or tracking services. If this changes, we will update this privacy policy accordingly and, where required by law, obtain your consent.

7. International Data Transfers

Your data is processed within the European Union. We do not transfer personal data to countries outside the EU/EEA without appropriate safeguards.

8. Right to Lodge a Complaint

If you believe that the processing of your personal data violates data protection law, you have the right to lodge a complaint with a supervisory authority, particularly in the EU member state where you reside, work, or where the alleged violation occurred.

9. Changes to This Privacy Policy

We may update this privacy policy from time to time to reflect changes in our practices or applicable law. We will notify users of any material changes by posting the updated policy on our website.

Last updated: 22/09/2025