Why can't computers solve CAPTCHAs?
Google combines (or hashes) that key with the web address you're visiting, so you can't use a CAPTCHA from one website to bypass another. It further combines that with “fingerprints” from your browser, catching microscopic variations in your computer that a bot would struggle to replicate (such as CSS rules).
Simple CAPTCHAs can be bypassed using the Optical Character Recognition (OCR) technology that recognizes the text inside images, such as scanned documents and photographs. This technology converts images containing written text into machine-readable text data.
The short answer is yes, computers can solve CAPTCHAs! It involves using neural networks (the meat and potatoes of artificial intelligence) to train computers based on given examples of CAPTCHAs and what the text in each picture is.
reCAPTCHA analyzes interactions with the website to detect if they are made by a human or some form of automated abuse. Sometimes, you may see a "failed reCAPTCHA check" error message while trying to create or amend your account. This means the website believes your actions may be those of a bot.
Popular methods to break CAPTCHA
Machine learning — Using computer vision, convolutional neural network, and python frameworks and libraries like Keras, tensorflow. We can train deep convolutional neural net models to find the letters and digits in the CAPTCHA image.
Threat actors have launched a new campaign that starts with compromised WordPress sites and leads to fake reCAPTCHA sites designed to get visitors to accept web push notifications.
Yes, CAPTCHA Can Be Hacked
CAPTCHA in all of its forms can be hacked or bypassed, and easily so. There are even courses one can take to learn how to create bots to bypass image-based and text-based CAPTCHA.
In short, yes they can. While reCAPTCHA v2 and v3 can help limit simple bot traffic, both versions come with several problems: User experience suffers, as human users hate the image/audio recognition challenges. CAPTCHA farms and advances in AI allow cybercriminals and advanced bots to bypass reCAPTCHAs easily.
Some bots can get past the text CAPTCHAs on their own. Researchers have demonstrated ways to write a program that beats the image recognition CAPTCHAs as well. In addition, attackers can use click farms to beat the tests: thousands of low-paid workers solving CAPTCHAs on behalf of bots.
Easy to implement and often free, traditional CAPTCHAs are widely used as a basic bot protection measure. But they're not immune to bots (in fact, data shows 50% of passed reCAPTCHAs are actually completed by bots).
Can reCAPTCHA be fooled?
Researchers Fool ReCAPTCHA With Google's Own Speech-To-Text Service. The new method has a 90 percent success rate at tricking the robot into thinking it's human.
A captcha is a simple test that intends to distinguish between humans and computers. While the test itself is simple, there's a lot happening behind the scenes. The answers we give captchas end up being used to make AI smarter, thus ratcheting up the difficulty of future captcha tests.
Note: reCAPTCHA tokens expire after two minutes. If you're protecting an action with reCAPTCHA, make sure to call execute when the user takes the action rather than on page load. You can execute reCAPTCHA on as many actions as you want on the same page.
They are designed to be difficult to interpret by computer software, but meant to be easy to interpret by people (a type of Turin test). Unfortunately, due to advances in AI, CAPTCHA's are getting harder to design so they are still relatively easy for people to pass whilst still rejecting automated attempts.
CAPTCHAs' purpose is to prevent spam on websites, such as promotion spam, registration spam, and data scraping, and bots are less likely to abuse websites with spamming if those websites use CAPTCHA. Many websites use CAPTCHA to prevent bot raiding, and it works effectively.
Some bots can get past the text CAPTCHAs on their own. Researchers have demonstrated ways to write a program that beats the image recognition CAPTCHAs as well. In addition, attackers can use click farms to beat the tests: thousands of low-paid workers solving CAPTCHAs on behalf of bots.
CAPTCHA images are commonly used on websites to prevent criminals when they attempt to abuse web services — particularly when they try to use malicious automation like Puppeteer to break into a site. Because of this, there continue to be advances in utilizing neural networks to solve picture-based security.