Legal Notice & Privacy Policy

Legal information in accordance with German law (§5 TMG) and EU General Data Protection Regulation (GDPR/DSGVO)

Non-Commercial Personal Website Declaration

This is a personal, non-commercial portfolio website created for educational, informational, and professional networking purposes only. This website:

  • Does not engage in commercial activities or business transactions
  • Does not display advertisements or monetization mechanisms
  • Does not use affiliate links or commercial partnerships
  • Does not offer paid services or products
  • Is intended solely for showcasing technical projects, professional experience, and thought leadership

Legal Basis: As a purely personal, non-commercial website with no monetization, this site may be exempt from certain provisions of §5 TMG regarding full address disclosure (German Telemedia Act), while still maintaining transparency and GDPR compliance.

1. Information Pursuant to §5 TMG (Site Operator)

Name: Kilian Lehn

Email: kilian@familylehn.com

Contact Form: Interactive Graph-Based Contact Form

Responsible for Content

Kilian Lehn (contact information as above)

Privacy Protection Notice: In accordance with data minimization principles under GDPR Art. 5(1)(c), and to protect personal privacy, a full residential address is not disclosed on this non-commercial personal website. A postal address can be provided upon legitimate request via the email contact above.

2. Data Protection Declaration (Datenschutzerklärung)

2.1 General Information

The protection of your personal data is of particular importance to us. We process your data in accordance with the applicable data protection regulations, in particular the EU General Data Protection Regulation (GDPR) and the German Federal Data Protection Act (BDSG).

2.2 Data Controller

The data controller responsible for the processing of personal data on this website is:

Kilian Lehn (contact information as provided above)

2.3 Personal Data Collection and Processing

a) Website Visit (Server Log Files)

When you visit this website, our hosting provider automatically collects and stores information in server log files, which your browser transmits to us. This includes:

  • Browser type and version
  • Operating system used
  • Referrer URL (previously visited page)
  • Hostname of the accessing computer
  • IP address (anonymized or pseudonymized where technically possible)
  • Date and time of the request

Legal Basis: Art. 6(1)(f) GDPR (legitimate interests in ensuring system security, technical administration, and optimization of our online offering)

Retention Period: Log files are deleted after a maximum of 7-14 days.

b) Cookies

This website does NOT use cookies.

We do not employ cookies, tracking technologies, or third-party analytics services. No behavioral tracking, profiling, or automated decision-making occurs on this website.

c) Contact Form / Email Communication

If you contact us via email or contact form, the data you provide (name, email address, message content) will be stored for the purpose of processing your inquiry and potential follow-up questions.

Legal Basis: Art. 6(1)(a) GDPR (consent) or Art. 6(1)(f) GDPR (legitimate interest in responding to inquiries)

Retention Period: Until the purpose is fulfilled or you request deletion.

d) Third-Party Services

This website does not integrate third-party services such as Google Analytics, Facebook Pixel, advertising networks, social media plugins, or Content Delivery Networks (CDNs) that process personal data.

External links: This website may contain links to external websites. We have no control over the data protection practices of third-party sites. Please review their privacy policies.

2.4 Your Rights Under GDPR

You have the following rights regarding your personal data:

  • Right of Access (Art. 15 GDPR): Request information about your stored personal data
  • Right to Rectification (Art. 16 GDPR): Request correction of inaccurate data
  • Right to Erasure (Art. 17 GDPR): Request deletion of your data ("right to be forgotten")
  • Right to Restriction (Art. 18 GDPR): Request limited processing of your data
  • Right to Data Portability (Art. 20 GDPR): Receive your data in a structured format
  • Right to Object (Art. 21 GDPR): Object to data processing based on legitimate interests
  • Right to Withdraw Consent (Art. 7(3) GDPR): Withdraw consent at any time

Right to Lodge a Complaint: You have the right to lodge a complaint with a supervisory authority (Datenschutzbehörde) if you believe data processing violates GDPR.

2.5 Data Security

We employ appropriate technical and organizational measures to protect your data against accidental or unlawful destruction, loss, alteration, unauthorized disclosure, or access. Our security measures are continuously improved in line with technological developments.

2.6 Data Minimization and Purpose Limitation

In accordance with GDPR principles (Art. 5), we only collect and process personal data that is necessary for the specified purposes. Data is not processed for purposes incompatible with the original purpose and is retained only as long as necessary.

3. Liability for Content

As a service provider, we are responsible for our own content on these pages in accordance with general laws pursuant to Section 7(1) TMG (German Telemedia Act). However, according to Sections 8 to 10 TMG, we are not obligated to monitor transmitted or stored third-party information or to investigate circumstances that indicate illegal activity.

Obligations to remove or block the use of information under general law remain unaffected. However, liability in this regard is only possible from the time of knowledge of a specific infringement. Upon notification of corresponding legal violations, we will remove this content immediately.

4. Liability for Links

Our website contains links to external third-party websites, over whose content we have no influence. Therefore, we cannot assume any liability for this external content. The respective provider or operator of the linked pages is always responsible for their content.

The linked pages were checked for possible legal violations at the time of linking. Illegal content was not recognizable at the time of linking. However, permanent monitoring of the content of linked pages is unreasonable without concrete indications of a legal violation. If we become aware of legal violations, we will remove such links immediately.

5. Copyright and Intellectual Property

The content and works created by the site operator on these pages are subject to German copyright law (Urheberrechtsgesetz). The reproduction, editing, distribution, and any kind of use beyond the limits of copyright require the written consent of the respective author or creator.

Downloads and copies of this site are permitted for private, non-commercial use only. Insofar as the content on this site was not created by the operator, the copyrights of third parties are observed. Third-party content is identified as such. Should you nevertheless become aware of a copyright infringement, please notify us accordingly. Upon notification of violations, we will remove such content immediately.

License Information

Unless otherwise stated, all content on this website is the intellectual property of Kilian Lehn. Code examples and technical implementations may be shared under open-source licenses where explicitly indicated.

6. Dispute Resolution

The European Commission provides a platform for online dispute resolution (ODR): https://ec.europa.eu/consumers/odr/

We are not obliged and not willing to participate in dispute resolution proceedings before a consumer arbitration board, as this is a non-commercial personal website.

7. Contact for Data Protection Inquiries

For questions regarding the collection, processing, or use of your personal data, for information, rectification, blocking, or deletion of data, as well as revocation of consent or objection to specific data use, please contact:

Email: kilian@familylehn.com

Subject Line: "Data Protection Inquiry / Datenschutzanfrage"

Last Updated: January 2025

This legal notice and privacy policy may be updated periodically to reflect legal or technical changes.