![]() ![]() ![]() It presents you with two words, one of which it already knows. Their attempt at hacking reCaptcha relies on the process reCaptcha uses to identify words. Anon, a common name for 4channers, first tried to hack reCaptcha. If you can read it, you’re most likely a human. It presents you with two words, made difficult to read by strange kearning, warping, and squiggles. Focusing mainly on what happened when the autovoting software was shut down due to reCaptcha. This article is very interesting as it delves into the details of the attack. This refers to the IRC Chanel where many 4channers congregate as well as “the game” an internet meme. ![]() Not only that, but if you read the first letters of the poll results, you get “Marblecake also the game”. Though Time won’t admit it, their poll on the most influential person was hacked. Machine learning was used to improve the accuracy when parsing the audio, but it still required tens of thousands of human verifications before it was reliably running on its own.Ĭontinue reading “Stiltwalker Beat Audio ReCAPTCHA” → Posted in Security Hacks Tagged audio, captcha, layerone, machine learning, recaptcha, stiltwalker Are You Human? Then Type Out This Book The team found out that there’s a way to exploit the entry of those word, misspelling them just enough so that they would validate as any of up to three different words. There were only 58 words used in the system. But it’s still really fun to hear about their exploit. In fact, about an hour before the talk (embedded after the break) Google upgraded the system, making it much more complex and breaking what these guys had accomplished. We’d like to remind readers that audio is important as visual-only confirmations are a bane of visually impaired users. That secondary option is where the toils of Stiltwalker were aimed, and at the time the team achieved 99% accurracy. But you may not have noticed the option to have words read to you. We’re all familiar with the obscured images of words that need to be typed in order to confirm that you’re human (in fact, there’s a cat and mouse game to crack that visual version). This talk from the 2012 LayerOne conference outlines how the team build Stiltwalker, a package that could beat audio reCAPTCHA. ![]()
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