The present disclosure relates to a 5th-Generation (5G) communication
system or a 6th-Generation (6G) communication
system for supporting higher data rates beyond a 4th-Generation (4G) communication
system such as Long Term Evolution (LTE). The present disclosure provides techniques for performing
authentication and
authorization based on
client credential assertion in a
wireless communication system. A method performed by a network entity for performing
client credential assertion (CCA)-based
authentication and
authorization of the network entity is provided. In one embodiment, a method includes sending, by a network entity, a first service request to a network repository function (NRF), where sending of the first service request includes encrypting, by the network entity, a CCA token using a
Key Encapsulation Mechanism (KEM), where the KEM is based on a predefined post-
quantum cryptography (PQC) mechanism, where the KEM is based on the PQC mechanism. The encrypted CCA token is signed by the network entity using a
digital signature to generate a
quantum-secure CCA token, where the
quantum-secure CCA token is a digitally signed encrypted CCA token and the
digital signature is based on a predefined PQC mechanism, and sending, by the network entity, the quantum-secure CCA token to the NRF along with the first service request, where the quantum-secure CCA token is the digitally signed encrypted CCA token and the
digital signature is based on a predefined PQC mechanism. And receiving, by the network entity, a service response to the first service request from the NRF.