http://njbpph6wt7n2fzmok5t3z6pnzvv22jtuqdoscc73ilshfty7yll6pnyd.onion/en/privacy
GDPR, § 22 Section 1 No. 1 lit. b BDSG for the technical functionality of the program, for example the content feedback function, and Article 6, § 1, lit. f. GDPR respectively § 27 Section 1 BDSG for the statistical/scientific evaluation of data shared in the online-sessions, surveys and message- and chat-windows when participating in the chat-study.