CAPTCHA Later :P
Ever been doing something on the internet and seen one of those boxes with the crazy letters that you have to type in the letters before it’ll let you finish you’re post or comment on you’re friends Myspace page? It’s called a CAPTCHA which is an acronym for Completely Automated Public Turing Test to Tell Computers and Humans Apart. They’re also known as a type of Human Interaction Proof (HIP). You’ve probably seen CAPTCHA test on lots of Web sites and you have to type them in correctly in order to complete the form.
The reason behind CAPTCHA is quite simply to stop people from exploiting a weakness in the computers running the site. While these people make up a minority of all the people on the internet, their actions can affect millions of users. For example, a free email service might find itself over run with account requests from an automated program which could be part of a larger attempt to send out spam mail to millions of people. CAPTCHA tests help prevent this from happening.
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