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Posted on 13 November 2017

Security

Artificial intelligence can outsmart Captcha

Computer scientists have developed artificial intelligence that can outsmart the Captcha website security check system.

Captcha challenges people to prove they are human by recognising combinations of letters and numbers that machines would struggle to complete correctly.
Researchers developed an algorithm that imitates how the human brain responds to these visual clues.
The neural network could identify letters and numbers from their shapes.
The research, conducted by Vicarious - a Californian artificial intelligence firm funded by Amazon founder Jeff Bezos and Facebook's Mark Zuckerberg - is published in the journal Science.
What is Captcha?
The Captcha test, which means the "Completely Automated Public Turing test to tell Computers and Humans Apart", was developed in the late 1990s to prevent people from using automated bots to set up fake accounts on websites.
When logging into a website, users prove that they are human by solving visual puzzles, which requires identifying letters, digits, symbols or objects that have been distorted or animated in some way.
Computers usually struggle to pass such tests, and Google says that its reCaptcha test is so complicated that even humans can only solve it 87% of the time.
However, researchers from Vicarious claim that their computer algorithm can pick out distorted letters and digits from images.