A method for resisting attack from mobile desk pretended to be legal mobile station in RSA certification course includes carrying out certification on first certification request information sent from mobile station by base station, recording a corresponding relation of mobile station connection identification to status information in first certification request information, checking said corresponding relation in recertification request information when recertification request message is received by base station, treating recertification request message as message sent from fake of legal mobile station and directly discarding off said message if as the same as said corresponding relation is not existed in base station. |