CAPTCHA
A challenge-response test used to distinguish human users from automated programs. Common forms include image recognition, text entry and visual reasoning tasks; it is an important means of human-machine identification.
Timeline (last 90 days)
For more than two decades, the internet has managed automated traffic through a combination of robots.txt, anti-crawling mechanisms, and CAPTCHAs.
CAPTCHA stands for "Completely Automated Public Turing test to tell Computers and Humans Apart" and was proposed by Luis von Ahn and others around 2000.
When websites cannot distinguish agents from real people, CAPTCHAs become more frequent and more complex, and real people are forced to bear higher verification costs.
CAPTCHA blocks automated access through human-versus-machine distinction challenges, but its protective effectiveness is declining against agents driven by multimodal large models.
Advanced crawlers are already capable of bypassing most CAPTCHAs through automated solving services.
All Facts (5)
For more than two decades, the internet has managed automated traffic through a combination of robots.txt, anti-crawling mechanisms, and CAPTCHAs.
50%UnverifiedCAPTCHA stands for "Completely Automated Public Turing test to tell Computers and Humans Apart" and was proposed by Luis von Ahn and others around 2000.
50%UnverifiedWhen websites cannot distinguish agents from real people, CAPTCHAs become more frequent and more complex, and real people are forced to bear higher verification costs.
50%UnverifiedCAPTCHA blocks automated access through human-versus-machine distinction challenges, but its protective effectiveness is declining against agents driven by multimodal large models.
50%UnverifiedAdvanced crawlers are already capable of bypassing most CAPTCHAs through automated solving services.
50%