Completely Automated Public Turing test to tell Computers and Humans Apart — better known as CAPTCHA — is genuinely an irritant for anyone who browses the internet. Those fire hydrants, bridges, traffic lights and whatnot pop up every now and then on a site and you’ve to prove you are not a “robot”. Security research firm Cloudflare has introduced a new alternative to CAPTCHA. Here we explain what it is all about
Turnstile: The new alternative to CAPTCHA
“We hate it, you hate it, everyone hates it,” — is how Cloudfare refers to CAPTCHA and that’s why it is rolling out a better option called Turnstile. “Turnstile is our smart CAPTCHA alternative. It automatically chooses from a rotating suite of non-intrusive browser challenges based on telemetry and client behaviour exhibited during a session,” explains Cloudflare in a blog post.
How will everyone be able to use Turnstile?
Anyone, anywhere on the Internet, who wants to replace CAPTCHA on their site will be able to call a simple API, says Cloudflare. In the blog post, Cloudflare says that it partnered with Apple to use Private Access Tokens. Private Access Tokens are built directly into Turnstile. “While Turnstile has to look at some session data (like headers, user agent, and browser characteristics) to validate users without challenging them, Private Access Tokens allow us to minimize data collection by asking Apple to validate the device for us,” says Cloudflare in the blog post.
Visitors using operating systems that support these tokens, including the upcoming versions of macOS or iOS, can now prove they’re human without completing a CAPTCHA or giving up personal data. “By collaborating with third parties like device manufacturers, who already have the data that would help us validate a device, we are able to abstract portions of the validation process, and confirm data without actually collecting, touching, or storing that data ourselves,” says Cloudflare.
How will Turnstile work?
Cloudflare says that it has actually built a platform to test many alternatives and rotate new challenges in and out as they become more or less effective. “With Turnstile, we adapt the actual challenge outcome to the individual visitor/browser,” says the company. Cloudflare first runs a series of small non-interactive JavaScript challenges gathering more signals about the visitor/browser environment. Those challenges include proof-of-work, proof-of-space, probing for web APIs, and various other challenges for detecting browser quirks and human behaviour. “As a result, we can fine-tune the difficulty of the challenge to the specific request,” says the company,
Machine learning models are also used by Turnstile to detect common features of a visitor who had earlier passed that challenge. “The computational hardness of those initial challenges may vary by visitor, but is targeted to run fast,” explains Cloudflare.
Turnstile: The new alternative to CAPTCHA
“We hate it, you hate it, everyone hates it,” — is how Cloudfare refers to CAPTCHA and that’s why it is rolling out a better option called Turnstile. “Turnstile is our smart CAPTCHA alternative. It automatically chooses from a rotating suite of non-intrusive browser challenges based on telemetry and client behaviour exhibited during a session,” explains Cloudflare in a blog post.
How will everyone be able to use Turnstile?
Anyone, anywhere on the Internet, who wants to replace CAPTCHA on their site will be able to call a simple API, says Cloudflare. In the blog post, Cloudflare says that it partnered with Apple to use Private Access Tokens. Private Access Tokens are built directly into Turnstile. “While Turnstile has to look at some session data (like headers, user agent, and browser characteristics) to validate users without challenging them, Private Access Tokens allow us to minimize data collection by asking Apple to validate the device for us,” says Cloudflare in the blog post.
Visitors using operating systems that support these tokens, including the upcoming versions of macOS or iOS, can now prove they’re human without completing a CAPTCHA or giving up personal data. “By collaborating with third parties like device manufacturers, who already have the data that would help us validate a device, we are able to abstract portions of the validation process, and confirm data without actually collecting, touching, or storing that data ourselves,” says Cloudflare.
How will Turnstile work?
Cloudflare says that it has actually built a platform to test many alternatives and rotate new challenges in and out as they become more or less effective. “With Turnstile, we adapt the actual challenge outcome to the individual visitor/browser,” says the company. Cloudflare first runs a series of small non-interactive JavaScript challenges gathering more signals about the visitor/browser environment. Those challenges include proof-of-work, proof-of-space, probing for web APIs, and various other challenges for detecting browser quirks and human behaviour. “As a result, we can fine-tune the difficulty of the challenge to the specific request,” says the company,
Machine learning models are also used by Turnstile to detect common features of a visitor who had earlier passed that challenge. “The computational hardness of those initial challenges may vary by visitor, but is targeted to run fast,” explains Cloudflare.
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