Google Speech-to-Text API Can Help Attackers Easily Bypass Google reCAPTCHA
January 05, 2021Ravie Lakshmanan
A three-year-old attack technique to bypass Google's audio reCAPTCHA by using its own Speech-to-Text API has been found to still work with 97% accuracy. Researcher Nikolai Tschacher disclosed his findings in a proof-of-concept (PoC) of the attack on January 2. "The idea of the attack is very simple: You grab the MP3 file of the audio reCAPTCHA and you submit it to Google's own speech-to-text API," Tschacher said in a write-up. "Google will return the correct answer in over 97% of all cases." Introduced in 2000, CAPTCHAs (or Completely Automated Public Turing test to tell Computers and Humans Apart) are a type of challenge-response tests designed to protect against automated account creation and service abuse by presenting users with a question that is easy for humans to solve but difficult for computers. reCAPTCHA is a popular version of the CAPTCHA technology that was acquired by Google in 2009. The search giant released the third iteration of re
