Cryptology ePrint Archive: Report 2012/689
Available versions in chronological order
20121210:115912 (posted 10-Dec-2012 11:59:12 UTC)
Cryptography Using CAPTCHA Puzzles
Abishek Kumarasubramanian and Rafail Ostrovsky and Omkant Pandey and Akshay Wadia
Publication Info: PKC 2013
20121212:080145 (posted 12-Dec-2012 08:01:45 UTC)
Cryptography Using CAPTCHA Puzzles
Abishek Kumarasubramanian and Rafail Ostrovsky and Omkant Pandey and Akshay Wadia
Publication Info: PKC 2013
20130116:091208 (posted 16-Jan-2013 09:12:08 UTC)
Cryptography Using CAPTCHA Puzzles
Abishek Kumarasubramanian and Rafail Ostrovsky and Omkant Pandey and Akshay Wadia
Publication Info: PKC 2013
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