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An example of a reCAPTCHA challenge from 2007, containing the words "following finding". The waviness and horizontal stroke were added to increase the difficulty of breaking the CAPTCHA with a computer program. A CAPTCHA usually has a text box directly underneath where the user should fill out the text that they see. In this case, "sclt ..was ...
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CAPTCHA. Completely Automated Public Turing Test to tell Computers and Humans Apart. CD-ROM. Compact Disc Read-Only Memory. DVD. Digital Versatile Disc. Fios. Fiber Optic Service. GIF. Graphics ...
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.
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] [61] The reCaptcha is a CAPTCHA system owned by Google. The reCaptcha ...
An example of how reCAPTCHA challenges were presented in 2010, [29] containing the words "and chisels" The main purpose of a CAPTCHA system is to block spambots while allowing human users. On December 14, 2009, Jonathan Wilkins released a paper describing weaknesses in reCAPTCHA that allowed bots to achieve a solve rate of 18%.
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 ...
In AOL Mail, click Compose.; Click the Attach icon. - Your computer's file manager will open. Find and select the file or image you'd like to attach. Click Open.; The file or image will be attached below the body of the email.