Glossary
Plain-English definitions for the words privacy tools throw at you.
Proof-of-Work CAPTCHA
A CAPTCHA that requires the visitor's browser to solve a cryptographic puzzle, making mass automation expensive without showing visual challenges.
Invisible CAPTCHA
A CAPTCHA that scores the request without ever showing a challenge to the user.
Honeypot Field
A hidden form field that humans never see but bots fill in, catching dumb spam at zero cost.
CAPTCHA Solving Service
A paid third-party that solves CAPTCHAs for bot operators, typically using human workers in low-wage regions.
Behavioral Analysis CAPTCHA
A CAPTCHA approach that scores requests based on user behavior signals (cursor, timing, scroll, history) instead of an explicit challenge.
Bot Management
The broader category of tools that detect and route bot traffic, of which CAPTCHA is one component.