Captcha
Captcha : (ICT) (IS) A captcha is a program used to verify that a human, rather than a computer, is entering data. Captchas are commonly seen at the end of online forms and ask the user to enter text from a distorted image. The text in the image may be wavy, have lines through it, or may be highly irregular, making it nearly impossible for an automated program to recognize it. based on spread spectrum techniques where each voice or data call uses the whole radio band and is assigned a unique code
No records Found