Abstract: A method, an apparatus and system for authentication are provided. The method includes: acquiring, on reception of an authentication request sent by a terminal, target point information, and sending the target point information to the terminal, so that the terminal displays a position point to be gazed at by a user on a screen base on the target point information; receiving first eye information acquired by the terminal when the user gazes at the position point; and performing identity authentication on the user based on the first eye information and the target point information. With the method, the apparatus, and the system for authentication, identify authentication is performed based on the eye information and the coordinates of the position point, so as to verify the iris, increase the security of payment and confirm the pay willingness of the user.