CAPTCHA - Completely Automated Public Turing test to tell Computers & Human Apart. Captcha is used as a image recognition tool to get rid out of spammers and robot(bot). Only the human can do these image recognition and robots cant recognise these images. So this type of human authentication becomes necessary for a form submission pages. This free utility HCIC (HIOX Captcha Image maker) script can be used to create a random captcha image on every reload of the page. The image is created by using the combinations of 62 alphanumerical characters.