Image-based human interactive proofs

A computer-implemented method comprising:

• comparing input received from a client regarding an image-based puzzle to known input from one or more humans regarding the image-based puzzle;
• determining whether the input received from the client is human input or non-human input based on the comparing;
• if the input is human input, enabling the client to access one or more resources;
• and
• if the input is non-human input, denying the client access to the one or more resources.

A system comprising:

• one or more computer-readable storage media;
• and
• computer-readable instructions embodied on the one or more computer-readable storage media which, when executed, implement a human interactive proof (HIP) management module configured to:
• provide an image-based puzzle to a client when the client seeks access to one or more resources;
• receive an answer to the image-based puzzle input by the client;
• determine whether the received answer is from a human;
• and
• enable the client to access the one or more resources responsive to the received answer being determined to be from a human.