As project , the PoC did layover escape , but Germany - establish researcher Nikolai Tschacher has make out to pick off the PoC for unCaptcha2 to induce it social occasion against the freshly rendering of reCAPTCHA v2 . The research worker famed at the clock that they would not be advance their code and that at some point it would actually occlusion pass . Tschacher issue a television march how a bot can utilise Google ’s ain voice communication - to - textual matter API with an accuracy of 97 percentage to puzzle out the audio reCAPTCHA . The round was address UnCaptcha by researcher . Google bring in respective melioration to the reCAPTCHA schema after the cognitive operation was discover and unCaptcha no more thirster go . In 2017 , a squad of researcher from the University of Maryland regain that online lecture - to - text services could be habituate with a senior high school arcdegree of preciseness to overwhelm reCAPTCHA v2 audio recording challenge mechanically . In January 2019 , all the same , investigator adjudge that they had wield to quicken the assail , address it unCaptcha2 , and put out the trial impression - of - construct ( PoC ) cypher with the license of Google .
In 2018 , Google secrete reCAPTCHA v3 , which tone exploiter go through by prevail adaptive gamble analysis in the backcloth rather than indicate difficulty , but Tschacher signal out that “ reCAPTCHA v2 is quiet use as a surrender - back up mechanism in the New reCAPTCHA v3 . ” The writer , along with a description of the advance he produce in unCaptcha3 proportional to unCaptcha2 , eject the PoC inscribe . It is worth note that some have arise liberal network browser denotation that enable drug user purpose the unCaptcha come near to fixate reCAPTCHA trouble like a shot with the cluck of a push .