Framework to design completely automated reverse Turing tests

A computing device comprising:

• one or more processors;
• and
• one or more non-transitory computer-readable storage media to store instructions executable by the one or more processors to perform operations comprising:
• defining a CAPTCHA generator, wherein
• a CAPTCHA is a Completely Automated Public Turing tests to tell Computers and Humans Apart, and
• the CAPTCHA generator is configured to generate CAPTCHA challenges by using at least a first parameter and a first plurality of values associated with the first parameter;
• defining an adversary program, wherein
• the adversary program is configured to automatically attempt to solve the CAPTCHA challenges;
• performing a first feedback loop comprising:
• generating a first plurality of CAPTCHA challenges,
• receiving feedback from a group of human users with respect to a first subset of the first plurality of CAPTCHA challenges, and
• receiving feedback from the adversary program with respect to a second subset of the first plurality of CAPTCHA challenges;
• and
• modifying a weight associated with a first value among the plurality of values, to determine a modified weight associated with the first value, wherein
• the modified weight changes how often the associated value will be used in generating a subsequent plurality of CAPTCHA challenges,
• the modifying is based, at least in part, on the feedback from the group of human users and the feedback from the adversary program, and
• the modifying is configured to accomplish at least one of:
• increasing a first success rate associated with human users solving the CAPTCHA challenges, and
• decreasing a second success rate associated with the adversary program solving the CAPTCHA challenges.

One or more non-transitory computer-readable storage media to store instructions executable by one or more processors to perform operations comprising:

• defining a CAPTCHA generator, wherein
• a CAPTCHA is a Completely Automated Public Turing tests to tell Computers and Humans Apart, and
• the CAPTCHA generator is configured to generate CAPTCHA challenges by using at least a first parameter and a first plurality of values associated with the first parameter;
• defining an adversary program, wherein
• the adversary program is configured to automatically attempt to solve the CAPTCHA challenges;
• performing a first feedback loop comprising:
• generating a first plurality of CAPTCHA challenges,
• receiving feedback from a group of human users with respect to a first subset of the first plurality of CAPTCHA challenges, and
• receiving feedback from the adversary program with respect to a second subset of the first plurality of CAPTCHA challenges;
• and
• modifying a weight associated with a first value among the plurality of values, to
• determine a modified weight associated with the first value, wherein
• the modified weight changes how often the associated value will be used in generating a subsequent plurality of CAPTCHA challenges,
• the modifying is based, at least in part, on the feedback from the group of human users and the feedback from the adversary program, and
• the modifying is configured to accomplish at least one of:
• increasing a first success rate associated with human users solving the CAPTCHA challenges, and
• decreasing a second success rate associated with the adversary program solving the CAPTCHA challenges.