A new image-based CAPTCHA using the orientation of
Jong-Woo Kim, Woo-Keun Chung, Hwan-Gue ChoVolume:
26
Language:
english
Pages:
9
DOI:
10.1007/s00371-010-0469-3
Date:
June, 2010
File:
PDF, 1.01 MB
english, 2010