The goal of CAPTCHA is to pose a question or task which is impossible for the computer to complete while also being easy for humans. Take for example the distorted word CAPTCHA type which shows an ...

It’s not as if it hasn’t been done before, but researchers at Stanford quantified ways to crack the CAPTCHA test many web sites use to make users prove they’re human, and recommended ways to make sure ...

Overview:  As bots grow more sophisticated in 2025, CAPTCHA tools have shifted from puzzles to behavior-based verification that protects platforms without ...

CAPTCHA used to be an easy and useful way for Web administrators to authenticate users. Now it’s an easy and useful way for malware authors and spammers to do their dirty work. CAPTCHA — Completely ...