by Edward
05 May 2010 18:26
I have been having several spam messages posted to my blog entries over the last 3-4 months, which now forced me to implement a captcha for when someone comments on my blog entries. I have not made this live yet, as I am also changing something something else on my blog. A captcha is a type of "challenge-response validation" test used in computing to ensure that the response is not generated by a computer. It is mostly used to protect users from unwanted spam or falsely made comments, or for people posting url's to link to other sites, for SEO benefits.
I thought I would share a few nice and easy captcha's that can be implemented by any .Net programmer.
- http://subkismet.codeplex.com (A stand-alone comment spam filtering library - Community project)
- http://recaptcha.net/plugins/aspnet/ (user control, ready to be implemented and configurable)
- http://www.codeproject.com/KB/validation/aspnet_capcha.aspx (click on the correct image captcha)
Hope you find one that will work for you!