New Attacks on CAPTCHAs Nice research: Abstract: We report a novel attack on two CAPTCHAs that have been widely deployed on the Internet, one being Google’s home design and the other acquired by Google (i.e. reCAPTCHA). With a minor change, our attack program also works well on the latest ReCAPTCHA version, which uses a new defence mechanism that was unknown to us when we designed our attack. This