Weblog of Nazly Ahmed
I have added the CAPTCHA on my blog when posting comments to avoid SPAM comments. CAPTCHA stands for "Completely Automated Public Turing test to tell Computers and Humans Apart" which is used in Web based applications to only allow human beings to submit data. Though I was aware of CAPTCHA it was Christian Wenz's tutorial session on "Web Application Security Bootcamp" during the ApacheCon Asia 2006 that influenced me to add this feature on my blog. So when you are posting comments you just need to enter the verification code you see in the image.