摘要
描述了一种安全实用的Flash动态验证码,该验证码由ASP代码生成,在Flash中显示,通过Flash动画遮罩,在任一时刻只显示验证码一部分,变换验证码字体、颜色和增加背景噪音等手段增加验证码被自动识别的难度。
This paper describes a safe and practical dynamic Flash CAPTCHA,which is generated by ASP code,displayed in Flash,and masked by a layer.At any given moment,only part of the CAPTCHA is displayed.The changes of CAPTCHA fonts and color and the background noises make it more difficult to be identified automatically.
出处
《煤炭技术》
CAS
北大核心
2011年第5期168-170,共3页
Coal Technology
