CAPTCHA: When signing up for an account, filling out a form, or making a purchase on a website, you must have come across the “I’m not a robot” captcha at some point. These tests are designed to protect against automated bots spamming websites or other malicious activity. However, the question remains, why do so many websites depend on captchas, and can bots really be stopped this way?
full form of captcha
CAPTCHA stands for “Completely Automated Public Turing Test to Tell Computers and Humans Apart.” The job of captcha is to create a challenge that is easy for humans to solve, but difficult for bots. To pass a captcha test, a user usually needs to identify text or select some of the specified images.
How does captcha work?
Many people find this work very strange. People say ‘what a nonsense, how can this captcha tell who is a robot and who is a human.’ The truth is that the easier this task is for humans, the more bots struggle to get it right. By adding captcha text to a website, site owners can prevent bots from automatically filling out forms, creating accounts, or submitting spam comments.
Drawbacks of CAPTCHA
However, bots get increasingly smart. Many bots are able to bypass the captcha. Even after fast technology, even today captcha remains a good tool to prevent many types of automatic attacks. Of course, captcha also has drawbacks. CAPTCHA poses a great challenge especially for people with visual or hearing impairments. Apart from this, some captchas become difficult to solve even for healthy humans, but now as bots are developing, captcha providers also have to think a step ahead.
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