Privacy policy
Last updated: 2026-11-08
Controller
Oleksandr Petrenko, trading as OP Scientific, Vienna, Austria. Email: oleksandr@opscientific.eu.
Server logs
This site is served from the controller's own server in Vienna. The web server (Caddy) writes access logs containing the IP address, time, requested URL, status code and user agent. They are used to operate and secure the site and are deleted after 14 days. The legal basis is Article 6(1)(f) GDPR (legitimate interest in secure and stable operation).
Analytics
Where enabled, we use a self-hosted instance of Umami. It sets no cookies, does not store full IP addresses and does not share data with third parties. The legal basis is Article 6(1)(f) GDPR (interest in understanding aggregate use of the site).
Cookies and third parties
This site sets no cookies. Fonts and scripts are self-hosted; your browser makes no requests to third-party hosts when loading a page.
Contact by email
If you write to oleksandr@opscientific.eu, we process your message and address to answer you (Article 6(1)(b) or (f) GDPR) and keep them as long as needed for that purpose and legal retention duties.
Your rights
You have the right of access, rectification, erasure, restriction of processing, data portability and objection (Articles 15 to 21 GDPR). Write to the email address above to exercise them.
You may lodge a complaint with the supervisory authority: Österreichische Datenschutzbehörde (DSB), Barichgasse 40-42, 1030 Wien, https://www.dsb.gv.at.