This post originated from an RSS feed registered with .NET Buzz by Sascha Corti. Original Post: My New, (hopefully) much more secure CaptCha Control Feed Title: Console.WriteLine("Hello World"); Feed URL: http://www.corti.com/WebLogSascha/blogxbrowsing.asmx/GetRss? Feed Description: A technology blog with a focus on the .NET framework, the Visual Studio .NET tools and the Windows server platform with of course the normal weblog-noise on what's happening in the industry and reviews of the latest geeky gadgets. Latest .NET Buzz Posts Latest .NET Buzz Posts by Sascha Corti Latest Posts From Console.WriteLine("Hello World");

I have revised my ASP.NET based CaptCha control that I use in the comments section. Daniel Turini told me (in my comments) that my first control lacks security as I loaded a static image for each character that the user needs to type - something easily breakable via a small script. The new CaptCha control always loads the same image which is an ASPX page that generates an output stream containing a bitmap, that consist of the pass phrase stitched together from an array of static images. Therefore, a program can no longer guess the correct pass phrase by analyzing the HTML source (which is now always the same).

Thanks for the hint, Daniel!

The new version can be downloaded here.