Articles about captcha

backdoor_648. Pic via Shutterstock

WordPress captcha plugin on 300,000 sites had a sneaky backdoor

WordFence is warning that the WordPress Captcha plugin, popular enough to get around 300,000 installations, should be replaced with the latest official WordPress version (4.4.5). To help admins, WordFence worked with the WordPress plugin team to patch pre-4.4.5 versions of the software; the code's developer has been blocked …

AI bot rips off human eyes, easily cracks web CAPTCHA codes. Ouch

Computer software that mimics how the human visual cortex works can solve text-based CAPTCHA challenges, the image recognition tasks often used by websites to differentiate human visitors from spam bots. A paper describing the code was published on Thursday in the journal Science. A team from Vicarious – a California startup …
Katyanna Quach, 26 Oct 2017
Pic: Shutterstock

CloudFlare shows Tor users the way out of CAPTCHA hell

CloudFlare has backed up its promise to get rid of the CAPTCHAs that Tor users complain discriminate against them. The content distribution network's (CDN's) hated CAPTCHAs make browsing an unhappy experience for Tor users by offering rather too many challenges. Worse yet, they drop a cookie on validated users' browsers and …

Google, Facebook's CAPTCHAs vanquished by security researchers

Black Hat Asia Google's and Facebook's CAPTCHA services have been defeated in research that successfully designed an automated system to solve the "are-you-human?" verification challenges. CAPTCHAS are designed to make life easier for trusted users and painful for bots, by presenting challenges that are difficult for software to crack. …
Darren Pauli, 7 Apr 2016

Google lets CAPTCHA-busters back into Play digital bazaar

CAPTCHA-busting malware wormed its way into apps hosted on Google Play, reaping up to US$250,000 from infected victims. So says BitDefender which has fingered the "MKero.A" malware as the source of the attack and says it spread across European social networks late last year, hitting Russians hardest, before being turfed out of …
Darren Pauli, 9 Sep 2015
Care Package NSFW by CC 2.0 attribution

Facebook serves up shaved, pierced, tattooed 'butterfly' as CAPTCHA

VERY NSFW Reg reader Mike W has sent us something rather interesting from Facebook, which asked him to prove he's human with the test below that asked him to pick out pictures of butterflies. We'll explain the white space at grid position A2 after the image. Facebook Butterfly Captcha Back to that white space, which we excised because …
Simon Sharwood, 30 Apr 2015
Barbed wire against a clear blue sky

Google kills CAPTCHAs: Are we human or are we spammer?

Google has developed a new CAPTCHA-like system to allow people, and not automated software, into websites with only a single click. The "No CAPTCHA reCAPTCHA" offers a tick box for humans to check rather than distorted text to decipher. It's designed so that automated spam software is still fooled by it and gets stuck on the …
John Leyden, 3 Dec 2014
Kill Captchas

CAPTCHA rapture as 'thousands' affected by seven year-old bug

A reflected cross site scripting flaw patched overnight may affect millions of websites due to a seven-year-old flaw in a jQuery validation plugin demo script used for CAPTCHA, Dutch penetration tester Sijmen Ruwhof says. The "severe" vulnerability appeared to have existed in CAPTCHA since 2007 and could lead to session …
Darren Pauli, 20 Nov 2014

Rorschach test suggested as CAPTCHA replacement

A group of boffins from Carnegie Mellon University is proposing that inkblot-style patterns form the basis of a system to replace CAPTHCAs, and is offering an open challenge to see how well it works. While the CAPTCHA has been successful in preventing some forms of attack, such as comment-spam on Web forums, CAPTCHA-protected …

Loathed wiggly-word CAPTCHAs morph into 'fun' click-'n'-drag games

A UK startup is trying to make a game out of solving CAPTCHAs*, the ubiquitous but sometimes irritating challenges designed to make sure that a human, rather than a 'bot, is registering for an online service. CAPTCHAs typically oblige website visitors to type out distorted words presented in images to prove that they are human …
John Leyden, 16 Oct 2013

TPG flashes cheeky 'down under' CAPTCHA

Completely Automated Public Turing test to tell Computers and Humans Apart, aka those CAPTCHA things you see on websites, raised hackles the other month for being less-than-useful for the disabled. An Australian Reg reader has since found one with the potential to get the won't-somebody-please-think-of-the-children? crowd …
Simon Sharwood, 20 Sep 2013

Twee...THUD: Boffins build 'The Classifier' to seek out, kill millions of Twitter fakes

Comp sci boffins spent a year buying up more than 100,000 fake Twitter accounts in a bid to help the teeny-tiny text transmitter beef up its spam defences. They also used their research to build a retroactive classifier that sniffed out the fakers so the Big Blue Bird itself could snuff them out. A group of researchers, …
Jasper Hamill, 15 Aug 2013
The Register breaking news

We shall CRUSH you, puny ROBOT... with CHESS

An online forum is using chess puzzles as CAPTCHAs rather than the more traditional challenge-response tests which ask the user to identify distorted text. The CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a way for a website or online service to establish that a human has come calling …
John Leyden, 14 Mar 2013
The Register breaking news

CAPTCHA-busting villains branch out from spam into ID theft

The cybercrooks attempting to defeat CAPTCHAs are no longer just traditional junk-mailers who want to get around the test to send spam. In a recent study, security researchers have discovered that criminals are also using circumvention techniques in attacks that harvest financial or personal data. A CAPTCHA (Completely …
John Leyden, 18 Jun 2012
The Register breaking news

Video CAPTCHAs target cyberbaddies

NuCaptcha has extended its video-based CAPTCHA service that it claims will make things easier for users while making life more difficult for spammers and other cyber-baddies. The technology, which is customisable, involves asking users to identify moving text in an animation against a video background. NuCaptcha is positioned …
John Leyden, 11 Aug 2011
The Register breaking news

Researchers find irreparable flaw in popular CAPTCHAs

Computer scientists have developed software that easily defeats audio CAPTCHAs offered on account registration pages of a half-dozen popular websites by exploiting inherent weaknesses in the automated tests designed to prevent fraud. Decaptcha is a two-phase audio-CAPTCHA solver that correctly breaks the puzzles with a 41- …
Dan Goodin, 23 May 2011
The Register breaking news

Croatian brainboxes deploy calculus-based CAPTCHA

Boffins at Croatia's Ruđer Bošković Institute are confronting surfers with difficult maths problems as an alternative to conventional CAPTCHA conundrums. Web users signing up for new accounts are typically asked to decipher the text in a jumbled up image and input the results into a dialogue box. The challenge-response test is …
John Leyden, 9 Mar 2011
The Register breaking news

Animated CAPTCHA tech aims to fox spambots

Replacing text puzzles featuring distorted letters with videos as a roadblock against the automated creation of web accounts can reduce user frustration while offering improved security, according to a Canadian start-up. CAPTCHAs (Completely Automated Public Turing test to tell Computers and Humans Apart) have been used for …
John Leyden, 1 Jul 2010

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