Telling humans and computers apart automatically

Communications of the ACM

Volumn 47, Issue 2, 2004, Pages 56-60

  Von Ahn, Luis ^a   Blum, Maunei ^a   Langford, John ^b  

^a Carnegie Mellon University   (United States)

^b TOYOTA TECHNOLOGICAL INSTITUTE AT CHICAGO   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

DISTORTED TEXT; TEXT RECOGNITION; TURING TESTS; WEB REGISTRATION FORMS;

ARTIFICIAL INTELLIGENCE; COMPUTER SOFTWARE; COMPUTER WORMS; CRYPTOGRAPHY; ELECTRONIC MAIL; PROBLEM SOLVING; SPAMMING; TURING MACHINES; WEBSITES;

IMAGE ANALYSIS;

EID: 2942728016     PISSN: 00010782     EISSN: None     Source Type: Journal    
DOI: 10.1145/966389.966390     Document Type: Review

References (10)

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2. Ahn, L. von, Blum, M., Hopper, N.J., and Langford, J. The CAPTCHA Web page; www.captcha.net.
3. Bongard, M.M. Pattern Recognition. Spartan Books, Rochelle Park, NJ, 1970.
4. Chan, N. Program Byan: drive.to/research.
5. Coates, A.L., Baird, H.S., and Fateman, R.J. Pessimal print: A Reverse Turing Test. In Proceedings of the International Conference on Document Analysis and Recognition (ICDAR'01), Seattle, WA, 2001, 1154-1159.
6. Lillibridge, M.D., Abadi, M., Bharat, K., and Broder, A. Method for selectively restricting access to computer systems. U.S. Patent 6,195,698.
7. Mori, G. and Malik, J. Recognizing objects in adversarial clutter - Breaking a visual CAPTCHA. In Proceedings of the Conference on Computer Vision and Pattern Recognition, June 2003.
8. Naor, M. Verification of a human in the loop or identification via the Turing Test; www.wisdom.weizmann.ac.il/\~-naor/PAPERS/human.ps.
9. Pinkas, B. and Sander, T. Securing passwords against dictionary attacks. In Proceedings of the ACM Computer and Security Conference (CCS'02), ACM Press, 161-170.
10. Turing, A.M. Computing machinery and intelligence. Mind 59, 236 (1950), 433-460.