![]() ![]() ![]() Layers of learningMany current CAPTCHA-cracking algorithms are neural networks - a type of artificial intelligence modelled loosely on the brain.Neural networks contain tens or hundreds of connected layers of artificial 'neurons'. For example, humans solve Google's complicated reCAPTCHAs, where letters are mashed together or intersected by lines, only 87 per cent of the time.And now the machines are catching up, commented Adnene Guabtni, a cybersecurity researcher at CSIRO's Data61. And in 2000, the 'Completely Automated Public Turing test to tell Computers and Humans Apart', or CAPTCHA, was born.Humans are naturally good at teasing out digits, letters and symbols, even when they're warped and jumbled together.But the advent of machine learning and increased computational power meant those distorted strings of text were quickly solved by machines and those early CAPTCHAs rendered useless.In response, CAPTCHAs became more complex and trickier for the bots - but also for real people. These include spambots, which create email accounts and send spam emails to addresses they've found online, and social bots, which harvest personal information from social media and share malicious links.ĬloseTo keep the bots at bay, some websites incorporate a step to prove you are, indeed, a real person. ![]() Search engines employ bots to trawl websites and update links.Others, not so much. Last year, online bot traffic surpassed that of humans.Some bots are helpful. Online arms raceThe internet is awash with automated programs called bots. New artificial intelligence can crack a range of CAPTCHAs - tests commonly used by websites to check if a user is a person or robot - with very little practice.Inspired by the human brain, a team from an artificial intelligence company in California has developed an algorithm that can be trained up to break complex text-based CAPTCHAs, including those used by PayPal and Google.And it can do so with 50,000 times fewer training examples than current state-of-the-art programs.' We just have to accept that, as computer vision systems improve, traditional text-based CAPTCHA systems no longer offer the protection they used to,' said study co-author Miguel Lazaro Gredilla of Vicarious AI. ![]() Machines masquerading as humans have never had it so easy. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |