| Monday May 30th 2016

The next generation of CAPTCHA

The following is a design for a CAPTCHA that is likely invulnerable to automated decryption. I originally developed this as part of an anti-spam system that was a very early progenitor of Receiver Initiated Authentication.  This CAPTCHA should be particularly invaluable given the recent reports that bots now have as high as a 35% successful attack rate against both the Microsoft and Yahoo CAPTCHA.

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