Design and implementation of Chinese character CAPTCHA based on multi-transfigure feature
基于多形变特征的汉字验证码的设计及实现*

CAPTCHA is a means to improve Web security nowadays.Since only a simple transfigure processing,the most of CAPTCHAs are lack of security and have a high rate to be cracked.Hence the paper designed some new methods of generating random Chinese CAPTCHAs which had crowd effect and multi-transfigure feature,and applied it in JSP dynamic Web successfully.Experiments show the CAPTCHAs generated by the paper are more secure and easy to use.