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Google Researches New Captcha Approach In Which Users Rotate Images Upward · HackerTrans

Google Researches New Captcha Approach In Which Users Rotate Images Upward(blogoscoped.com)

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blogoscoped.com

Google Researches New Captcha Approach In Which Users Rotate Images Upward

http://blogoscoped.com/archive/2009-04-19-n82.html

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