Assocaptcha

摘要

CAPTCHAs are challenge-response tests to verify that the user is a human (and not a program/robot). CAPTCHAs use problems that are trivial for humans to solve, but are hard for computers. Unfortunately, CAPTCHAs have focused only on one aspect of human ability: image/word recognition. This paper explores the usage of other human abilities: particularly, finding associations between related concepts; to design secure, human-friendly Human Interaction Proofs (HIPs)