Abishek Kumarasubramanian, Rafail Ostrovsky, Omkant Pandey, Akshay Wadia. Cryptography Using Captcha Puzzles. In Kaoru Kurosawa, Goichiro Hanaoka, editors, Public-Key Cryptography - PKC 2013 - 16th International Conference on Practice and Theory in Public-Key Cryptography, Nara, Japan, February 26 - March 1, 2013. Proceedings. Volume 7778 of Lecture Notes in Computer Science, pages 89-106, Springer, 2013. [doi]
Abstract is missing.