Prev: An Honest and Simple Question.
Next: Errors in Chaocipher Clearing House
From: Mok-Kong Shen on 17 Jul 2010 05:02

This presumably would be an improvement over Captcha:

http://www.newscientist.com/article/dn19166-picture-puzzles-separate-human-from-machine.html

M. K. Shen

 | 
Pages: 1
Prev: An Honest and Simple Question.
Next: Errors in Chaocipher Clearing House