Series 112 (LOT 13108)

This invention is generally related to an authentication system for a user login details. Techniques are disclosed to authenticate login information to avoid unauthorized access to a computer system. The authentication system checks whether an appropriate token is stored in the computer system that originates the login. The system initiates a communication with the user through a secondary communication channel and authenticates the login by generating private question/private answer dialogue with the user. The technology may be implemented in computer authentication system, computer security systems, user login verification system, etc.