International Journal of Computer Science and Mobile Computing (IJCSMC)
CAPTCHA (Completely Automated Public Turing Test to tell Computers and Human Apart) is a computer program which humans can pass but computer programs cannot pass. A new technology is built over the captcha called graphical captcha which eliminates dictionary attacks and hence more secure. With the hybrid use of CAPTCHA and graphical password, one can address a number of security problems such as relay attack and online guessing attacks. Shoulder surfing attacks can also be addressed with the help of dual view technology.