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This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.
reCAPTCHA Inc. [1] is a CAPTCHA system owned by Google.It enables web hosts to distinguish between human and automated access to websites. The original version asked users to decipher hard-to-read text or match images.
If you can't see the image, make sure your browser preferences are set to display images and try again. Alternatively, you can listen to the image challenge by clicking on the audio icon. Display images in Edge Display images in Safari Display images in Firefox Display images in Google Chrome Display images in Internet Explorer
A common counter-measure is to show the user an image of colored or distorted text, known as a CAPTCHA, and ask them to type the words shown. Since answering a CAPTCHA is a task that is hard to automate, it will allow most real humans to make their posts while stopping most spammers and other robotic attackers.
reCAPTCHA is a CAPTCHA-like system designed to establish that a computer user is human (normally in order to protect websites from bots) and, at the same time, assist in the digitization of books. A sensor based on a piezoelectric film (EMFI sensor) is used to detect mechanical vibrations and the presence of a person seated on the rear bench of ...
A graphical password or graphical user authentication is a form of authentication using images rather than letters, digits, or special characters. The type of images used and the ways, in which users interact with them vary between implementations.
The CAPTCHA system is commonly used online to tell humans and bots apart on the internet. It is based on the Turing test. Displaying distorted letters and numbers, it asks the user to identify the letters and numbers and type them into a field, which bots struggle to do. [18] [58] The reCaptcha is a CAPTCHA system owned by Google. The reCaptcha ...
In 2007, von Ahn invented reCAPTCHA, [24] a new form of CAPTCHA that also helps digitize books. In reCAPTCHA, the images of words displayed to the user come directly from old books that are being digitized; they are words that optical character recognition could not identify and are sent to people throughout the web to be identified. ReCAPTCHA ...