A Spelling Based CAPTCHA System by Using Click

2012 International Symposium on Biometrics and Security Technologies ◽

10.1109/isbast.2012.17 ◽

2012 ◽

Cited By ~ 8

Author(s):

Kuo-Feng Hwang ◽

Cian-Cih Huang ◽

Geeng-Neng You

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