Luis von Ahn is a professor of Computer Science at Carnegie Mellon University.

Selected Publications Luis von Ahn, Ben Maurer, Colin McMillen, David Abraham and Manuel Blum. reCAPTCHA: Human-Based Character Recognition via Web Security Measures. Science, September 12, 2008. pp 1465-1468. Luis von Ahn and Laura Dabbish. General Techniques for Designing Games with a Purpose. Communications of the ACM, August 2008. pp 58-67. Luis von Ahn. Games With A Purpose. IEEE Computer Magazine, June 2006. pp 96-98. Luis von Ahn, Ruoran Liu and Manuel Blum. Peekaboom: A Game for Locating Objects in Images. ACM Conference on Human Factors in Computing Systems, CHI 2006. pp 55-64. Luis von Ahn, Mihir Kedia and Manuel Blum. Verbosity: A Game for Collecting Common-Sense Knowledge. ACM Conference on Human Factors in Computing Systems, CHI Notes 2006. pp 75-78. Luis von Ahn, Shiry Ginosar, Mihir Kedia and Manuel Blum. Improving Accessibility of the Web with a Computer Game. ACM Conference on Human Factors in Computing Systems, CHI Notes 2006. pp 79-82. Luis von Ahn, Nicholas Hopper and John Langford. Covert Two-Party Computation. Symposium on the Theory of Computing (STOC) 2005. pp 513-522. Luis von Ahn and Nicholas Hopper. Public-Key Steganography. Advances in Cryptology, Eurocrypt 2004. pp 323-341. Luis von Ahn and Laura Dabbish. Labeling Images with a Computer Game. ACM Conference on Human Factors in Computing Systems, CHI 2004. pp 319-326. Luis von Ahn, Manuel Blum and John Langford. How Lazy Cryptographers do AI. Communications of the ACM, February 2004. pp 56-60. Luis von Ahn, Manuel Blum, Nicholas Hopper and John Langford. CAPTCHA: Using Hard AI Problems for Security. Advances in Cryptology, Eurocrypt 2003. pp 294-311. Nicholas Hopper, John Langford and Luis Von Ahn. Provably Secure Steganography. Advances in Cryptology, CRYPTO 2002. pp 77-92.

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Google Tech Talk This talk describes my work in generally accessible terms. You can also see: My talk on reCAPTCHA at the Library of Congress My Nova Special

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