US Patent 9563763 Enhanced captchas

Concepts and technologies are described herein for providing enhanced Completely Automated Public Turing tests to Tell Computers and Humans Apart (“CAPTCHAs”). According to some of the concepts and technologies disclosed herein, a CAPTCHA service may be configured to generate CAPTCHAs enhanced with watermarks and/or other enhancements. The CAPTCHA service may provide the enhanced CAPTCHAs to user services, such as Websites, Web services, and other services that utilize or are capable of utilizing CAPTCHAs as a security feature. The watermarks and/or other enhancements may contain information associated with users of the user services so that the enhanced CAPTCHAs are more difficult to break by unauthorized entities, including automated programs such as “bots.” According to other concepts and technologies disclosed herein, a CAPTCHA breaking service is provided.