Google recaptcha

Recaptcha overview
https://www.google.com/recaptcha/about/
Various versions
https://developers.google.com/recaptcha/docs/versions
Google Terms
https://policies.google.com/terms
Google “Hilfe zur Richtlinie über die Zustimmung der Nutzer in der EU” incl. ReCAPTCHA
https://www.google.com/about/company/user-consent-policy-help/
Google’s CookieChoices site
https://www.cookiechoices.org/

Google Google Measurement Controller-Controller Data Protection Terms
https://support.google.com/analytics/answer/9012600

Article by Usercentrics
https://usercentrics.com/de/knowledge-hub/strengere-anforderungen-fuer-den-einsatz-von-google-analytics/

CJEU – C-136/17: -> The prohibition on processing certain categories of sensitive personal data applies also to operators of search engines

Search engines and special categories of data

Press release:
https://curia.europa.eu/jcms/upload/docs/application/pdf/2019-09/cp190113en.pdf

https://europeanlawblog.eu/2019/11/20/gc-others-vs-cnil-and-google-this-is-a-special-case/

http://curia.europa.eu/juris/document/document.jsf?docid=218106&text=&doclang=EN&pageIndex=0&cid=11256519