The Evolution and Use of CAPTCHA

CAPTCHA, those distorted letters people often encounter when filling in web forms, can be found on an increasing number of web sites even though the can be annoying for users. Here is a look at what they are, why they are used and the arms race between those who want to keep spammers and others from web sites and those who want to misuse the internet.
Read More... [Source: Internet-and-Businesses-Online Articles from EzineArticles.com - Posted by FreeAutoBlogger]