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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.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
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.
Software that could reverse CAPTCHA with some accuracy by analysing patterns in the generating engine started being developed soon after the creation of CAPTCHA. [100] In 2013, researchers at Vicarious announced that they had developed a system to solve CAPTCHA challenges from Google , Yahoo! , and PayPal up to 90% of the time. [ 101 ]
Luis von Ahn (Spanish: [ˈlwis fon ˈan]; born 19 August 1978) is a Guatemalan-American entrepreneur, software developer, and consulting professor in the Computer Science Department at Carnegie Mellon University in Pittsburgh, Pennsylvania.
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).
Pronounced "A-star". A graph traversal and pathfinding algorithm which is used in many fields of computer science due to its completeness, optimality, and optimal efficiency. abductive logic programming (ALP) A high-level knowledge-representation framework that can be used to solve problems declaratively based on abductive reasoning. It extends normal logic programming by allowing some ...