Websites have been using CAPTCHAs as a means to differentiate between actual users and bots since the early days of the Internet, but Google has now introduced reCAPTCHA v3 with the aim of reducing the number of challenges to users.
The company has continually updated its reCAPTCHA API as more sophisticated bots have come closer to passing as actual humans. The first tests had users type in distorted text to prove they were human while the modern equivalent has users identify objects in images.
Google has also been working to make its reCAPTCHA challenges less noticeable by using a number of signals to help determine whether a users is authentic or fake.
reCAPTCHA v3
With today's release of reCAPTCHA v3, Google is improving the experience further by having the API return a score between 0.0 and 1.0. This score is then used to rank “how suspicious an interaction is” with the end goal to minimize the “need to interrupt users with challenges at all”.
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