Bonus: security + advertising potential…
NuCaptcha replaces jumbled text with video ads. A line of text--usually an advertising slogan--scrolls over the top of a video, with a code a few characters long at the end that a user must type in. A publisher can also choose to require that people type in the whole slogan to complete the Captcha. Video is much harder for software to process, says Giasson, meaning the text can be easier for humans to read than conventional Captchas.
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