Apparatus and method of generating application specific keys using key derived from network access authentication

A method performed by a user equipment (UE) in a wireless communication system, the method comprising:

• generating a key identifier corresponding to a key related to authentication and key management for applications (AKMA);
• transmitting, to an application function (AF) entity, a application session establishment request message including the key identifier;
• and
• receiving, from the AF entity, an application session establishment response message as a response to the application session establishment request message.

A user equipment (UE) performed in a wireless communication system, the UE comprising:

• a transceiver;
• and
• at least one processor coupled to the transceiver and configured to:
• generate a key identifier corresponding to a key related to authentication and key management for applications (AKMA);
• transmit, to an application function (AF) entity, a application session establishment request message including the key identifier;
• and
• receive, from the AF entity, an application session establishment response message as a response to the application session establishment request message.