Telling humans and computers apart automatically

How lazy cryptographers do AI.

[1]  B. Ripley,et al.  Pattern Recognition , 1968, Nature.

[2]  A. M. Turing,et al.  Computing Machinery and Intelligence , 1950, The Philosophy of Artificial Intelligence.

[3]  Moni Naor,et al.  VERI CATION OF A HUMAN IN THE LOOP OR IDENTI CATION VIA THE TURING TEST , 1996 .

[4]  Henry S. Baird,et al.  Pessimal print: a reverse Turing test , 2001, Proceedings of Sixth International Conference on Document Analysis and Recognition.

[5]  Benny Pinkas,et al.  Securing passwords against dictionary attacks , 2002, CCS '02.

[6]  Jitendra Malik,et al.  Recognizing objects in adversarial clutter: breaking a visual CAPTCHA , 2003, 2003 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2003. Proceedings..