Lanapsoft BotDetect™ prevents automated submissions of ASP.NET forms using CAPTCHA images.
The control provides a sound Captcha alternative as well, to keep ASP.NET web applications accessible to the blind and other people for whom reading the Captcha code could be a problem.
BotDetect ASP.NET CAPTCHA Component Custom Web Control generates and validates best-of-class Captcha images specifically designed to be out of reach of current computer vision and OCR technologies.
* 60 secure & readable Captcha image styles
* 10 secure & accessible Captcha sound styles
* Localized Captcha generation, using various Unicode character sets and downloadable multi-language sound pronunciations
* Custom Captcha image size, format, color scheme...
* Custom Captcha code length, style, character set, timeouts, generated code filtering...
* Produces XHTML 1.1 Strict and WCAG AAA compliant markup
* Visual Studio .NET 2010, 2008, 2005 and 2003 Designer support
* Medium trust environment support for shared servers
* Fully compatible with ASP.NET MVC and ASP.NET Ajax