Privacy notice

This website collects as little data as possible: no cookies, no tracking, no content from other servers, only a simple visitor count without personal data (below).

The controller within the meaning of the GDPR is Frederik Kirchhoff – GlasHoff Systems, which can be reached as given in the legal notice.

Visiting the website

When you open a page, your browser transmits technically necessary data, above all your IP address, along with the date, time and the address requested. They are used to deliver the page, and for the visitor statistics (below). The web server keeps no access log, so these data are not stored.

The legal basis is Art. 6(1)(f) GDPR; our legitimate interest is to provide the website.

Visitor statistics

To learn how much our website is used, our server counts the pages it delivers; nothing runs in your browser for this. Search engines and other programs that identify themselves as such are not counted. So that each visitor counts only once a day, the server forms a check value (hash) from your IP address and your browser's identification together with a random key that is new every day. Key and check values are held in memory only and deleted at midnight at the latest; your IP address itself is not stored. All that is kept is two numbers a day: page views and visitors. No cookies are set, nothing is stored on or read from your device, and no one but us receives the data.

The legal basis is Art. 6(1)(f) GDPR; our legitimate interest is to know how our website is used. You can object at any time, for example by email.

Contact form

When you send the form, your name, your company if given, your email address and your message are forwarded to us by email so that we can answer your enquiry. We keep the enquiry while we deal with it and delete it afterwards, unless statutory retention obligations require otherwise.

The legal basis is Art. 6(1)(b) GDPR where your enquiry concerns a contract, and Art. 6(1)(f) GDPR otherwise; our legitimate interest is to answer enquiries.

To protect against spam, your browser solves a small computational puzzle (ALTCHA) while you fill in the form. It is set and checked by this server, without any third party and without cookies. To fend off mass submissions, the server also keeps your IP address in memory for at most eleven minutes; it is neither written to disk nor passed on. The legal basis is Art. 6(1)(f) GDPR; our legitimate interest is protection against abuse.

Hosting and email

The server and the mailbox are operated for us by STRATO GmbH in Berlin, under a data processing agreement according to Art. 28 GDPR. The data stay in Germany.

Your rights

You have the right of access (Art. 15 GDPR), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18) and data portability (Art. 20), and the right to object to processing based on legitimate interests (Art. 21). An email to the address in the legal notice is enough.

You may also lodge a complaint with a data protection supervisory authority (Art. 77 GDPR), in particular in the member state where you live.

Last updated: September 2026