Blog
Practical articles on CAPTCHA, privacy and bot protection for teams in the EU.
- What is a CAPTCHA? How it works and which types exist
What a CAPTCHA is, how it tells humans from bots, the main types (image, invisible, proof-of-work) and how to choose one for your website.
- Cookie-free CAPTCHA: why it matters and how to check
Why a cookie-free CAPTCHA reduces consent and GDPR questions, what § 25 TDDDG says about device storage and how to test any widget yourself in five minutes.
- Accessible CAPTCHA: WCAG 2.2 and the European Accessibility Act
Why image puzzles lock users out, what WCAG 2.2 and the European Accessibility Act (BFSG in Germany) mean for CAPTCHAs, and a checklist for accessible bot protection.
- Proof-of-work CAPTCHA explained: no puzzles, no tracking
How a proof-of-work CAPTCHA works, why it needs no puzzle or cookie, what it costs a bot operator and where its limits are.
- How to stop form spam and fake sign-ups without losing customers
A practical plan to stop spam on contact forms, sign-ups and logins: layers that work, what to avoid and how to measure that real users are not blocked.