Now, software that can crack CAPTCHAs

ImageA technology startup said that it had come up with software that works like a human brain in one key way: it can crack CAPTCHAs, the strings of tilted, squiggly letters that websites employ to make users “prove you are human,” as Yahoo! and others put it.San Francisco-based Vicarious developed the algorithm not for any nefarious purpose and not even to sell, said co-founder D Scott Phoenix.

Instead, he said in a phone interview, “We wanted to show we could take the first step toward a machine that works like a human brain, and that we are the best place in the world to do artificial intelligence research.”

The company has not submitted a paper describing its methodology to an academic journal, which makes it difficult for outside experts to evaluate the claim. Vicarious offers a demonstration of its technology at vicarious.com, showing its algorithm breaking CAPTCHAs from Google and eBay’s PayPal, among others, but at least one expert was not impressed.

“CAPTCHAs have been around since 2000, and since 2003 there have been stories every six months claiming that computers can break them,” said computer scientist Luis von Ahn of Carnegie Mellon University, a co-developer of CAPTCHAs and founder of tech startup reCAPTCHA, which he sold to Google in 2009. “Even if it happens with letters, CAPTCHAs will use something else,pictures” that only humans can identify against a distorting background.

CAPTCHA stands for Completely Automated Public Turing test to tell Computers and Humans Apart. They are based on the standard set in 1950 by British mathematician Alan Turing in 1950: a machine can be deemed intelligent only if its performance is indistinguishable from a person’s.

Read More

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s