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Interesting Experimental Captchas

Posted By Markus On June 11, 2007 3:11 pm @ 3:11 pm (June 11, 2007) In spam, Machine Learning, Artificial Intelligence (AI), Security | No Comments

[1] Captchas are these little word-puzzles in images that web-sites use to keep spammers and bots out. They are everywhere and even the [2] New York Times had an article about Captchas recently. It turns out it’s a nice exercise in applying some machine learning to break these things (with lots of image manipulation to clean up the images). Since spam-bots are becoming smarter, people are switching to new kinds of Captchas. My favorites (using images) so far are [3] Kittenauth and a [4] 3D-rendered word-captcha.

Article printed from Markus Breitenbach: http://blog.markus-breitenbach.com

URL to article: http://blog.markus-breitenbach.com/2007/06/11/interesting-experimental-captchas/

URLs in this post:
[1] Captchas: http://captcha.net
[2] New York Times had an article about Captchas: http://www.nytimes.com/2007/06/11/technology/11code.html?pagewanted=1
[3] Kittenauth: http://www.kittenauth.com/
[4] 3D-rendered word-captcha: http://ocr-research.org.ua/teabag.html

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