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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. [1] The term was coined in 2003 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford. [2]
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.
AOL Mail uses many security measures to keep your account secure, one of which is CAPTCHA or image challenges when sending mail. These challenges exist to make it harder for hackers to access your accounts. The characters can't be read by a computer and must be entered manually, ensuring only a real person can pass the test. Why am I being ...
The online video game platform and game creation system Roblox has numerous games (officially referred to as "experiences") [1] [2] created by users of its creation tool, Roblox Studio. Due to Roblox ' s popularity, various games created on the site have grown in popularity, with some games having millions of monthly active players and 5,000 ...
If the user answers the KNOWN word incorrectly, they fail the captcha. However, if the known word is typed correctly, the user passes the captcha regardless, and the ansswer to the unknown word is passed to the captcha service for evaluation as a possible solution (explained in the article as a points based evaluation).
recaptcha uses words from the English language, which only has about +/- 50,000 words. I'm not sure this is even a weakness, and it seems to be the Wikipedia article's opinion. Brute force is not a realistic way to solve a captcha - for a 5-second page load, 65536 attempts would take 91 hours.
This is a list of islands in the world ordered by population, which includes all islands with more than 100,000 people. For comparison, continental landmasses are also shown, in italics. The population of the world's islands is over 730 million, approximately 9% of the world's total population.
Seychelles, an island country in the Indian Ocean, consists of over 100 islands. [1] Despite the large number of islands, less than half are inhabited, though many are tourist destinations. [ 2 ]