Patent ID: 7324805

Claim:
A method for registration and authentication of a wireless terminal at a wireless base station in a wireless commurneation system, the method comprising: (a) switching a mode of the wireless base station from a normal mode to a registration mode, as a user operates the wireless base station; (b) receiving a registration request information containing a terminal public key specific to the wireless terminal, a terminal encryption scheme using the terminal public key, and a terminal identifier of the wireless terminal, from the wireless terminal at the wireless base station; (c) upon receiving the registration request information at the wireless base station, transmitting a registration confirmation information indicating a registration of the wireless terminal, from the wireless base station to the wireless terminal, the registration confirmation information being encrypted by using the terminal public key and the terminal encryption method at the wireless base station; (d) switching the mode of the wireless base station from the registration mode to an authentication mode; (e) transmitting an authentication notice information containing a base station secret key specific to the wireless base station, a base station encryption scheme using the base station secret key, and a base station identifier of the wireless base station, from the wireless base station to the wireless terminal, the authentication notice information being encrypted by using the terminal public key and the terminal encryption scheme at the wireless base station; (f) receiving an authentication acknowledgement information indicating a receipt of the authentication notice information from the wireless terminal at the wireless base station, the authentication acknowledgement information being encrypted by using the base station secret key and the base station encryption scheme at the wireless terminal; and (g) when the wireless base station correctly decrypts the authentication acknowledgement information by using the base station secret key, switching the mode of the wireless base station from the authentication mode to the normal mode.