Method and device for operating terminal in wireless communication system

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

• a transceiver;
• and
• a processor coupled to the transceiver,
• wherein the processor is configured to:
• server address and is provided with a credential of a first SNPN from the provisioning server, and
• wherein the registration request includes a generated subscription concealed identifier (SUCI) and a first standalone non public network (SNPN) ID.

An base station operating in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a processor coupled to the transceiver,
• wherein the processor is configured to:
• control the transceiver to receive, from a user equipment (UE), a registration request;
• control the transceiver to transmit, to a DCS, an authentication information request based on the received registration request;
• control the transceiver to receive, based on the authentication information request, a response including at least one of a first certificate, an address of a provisioning server, and a provisioning server token;
• perform two-way authentication with the UE based on the received response;
• and
• control the transceiver to transmitting the provisioning server address and the provisioning server token to the UE based on the two-way authentication being completed,
• wherein the UE transmits, to the provisioning server, a credential request including the unique identifier and the provisioning server token based on the received provisioning.