Patent ID: 8880873

Claim:
A method for authenticating a cardless terminal, the method comprising: receiving, by an Application Server (AS), an AS access request containing a user identifier (ID) from a User Equipment (UE), wherein the UE is the cardless terminal; generating, by the AS, a key generation request containing the user ID and an AS ID; transmitting the key generation request to a gateway equipment at a network side, wherein the gateway equipment forms a authentication data request according to the key generation request; transmitting, by the gateway equipment, the authentication data request to an Home Subscriber Station (HSS), wherein the authentication data request comprises the user ID; generating, by the HSS, a first key, according to the user ID contained in the authentication data request, transmitting, by the HSS, the first key to the gateway equipment; generating, by the gateway equipment, a second key, according to the first key, the AS ID and a secret key parameter; receiving, by the AS, the second key generated by the gateway equipment; and authenticating, by the AS, the UE according to the second key.