A CAPTCHA Script helps to save your website from spam bots. Here goes a collection of free text based and image based CAPTCHA scripts.

Captcha là 1 trong những tiện ích giúp chúng ta bảo vệ website khỏi spam, thường cho form nhập liệu như trang liên hệ, hoặc 1 số chương trình tự động submit, như trang đăng nhập hoặc đăng ký

Today I decided to release a toolkit that I have been building over the past couple of months. Most of the code in the toolkit is related to MVC. The list of features includes many MVC ActionFilters, Routes, ViewEngines, and Extensions. Including ActionFilters for Cache, GZip Compression, CAPTCHA, ...

This post provides the source code to implement your own CAPTCHA using the MVC Framework. This was done using Attributes to validate the CAPTCHA so the implementation is hidden.

If you are looking for CAPTCHA-like protection written in C# this stuff for you.

If you are looking for a strong and free CAPTCHA solution for your web apps, reCAPTCHA is a good one! You can download various plugins for various server side programming technologies and ...

Comment spam bots love form fields

Article describe how to integrate you web site with new Microsoft project Asirra, which helps you to avoid bots sending spam to your web forms.

We all know the problem of automated comment spam, not only for blogs, but for every web site requesting information from the user which is published directly on the website. When you are asked to develop a site where you could encounter this problem, there is a pretty easy way to prevent it, wit...

Pretty interesting CAPTCHA using animal pictures.

Current CAPTCHA implementations suffer mainly from the problem of being unreadable, here's an idea