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On the strength of egglue and other logic captchas

By: Hernandez-Castro, Carlos Javier; Hernandez-Castro, Julio Cesar; Ribagorda, Arturo;

2011 / IEEE


This item from - IEEE Conference - 2011 International Conference on Security and Cryptography (SECRYPT) - CAPTCHAs or HIPs are tests able to tell humans and computers apart, remotely and over an untrustworthy channel. They rely on abilities that are though to be hard for algorithms, yet easy for humans. General logic reasoning, based on common sense knowledge, is one of the areas that are still considered hard for AI. On the other hand, logic reasoning targeting very specific areas has achieved success in AI. In this article, we list current Semantic and Logic CAPTCHAs and examine how strong they are. We also discuss wether this model is suited or not for automatic challenge generation and grading.