Date Added: Dec 2011
In the current digital world the people have various authentication systems which identify an individual. For example biometrics authentication system, knowledge based authentication system, token based authentication system. These systems have their own advantages and disadvantages. One system removes the disadvantages of other. A biometrics system is known as one of the robust system. But it also falls into several of attacks, which have been discussed in this paper. Also the known solution has been discussed. So that the authors can make a more robust authentication system.