Method and system for facilitating post quantum secure primary authentication of a subscriber

A method performed by a network entity for performing secure primary authentication of a subscriber, the method comprising:

• receiving, from a user equipment (UE), an encrypted quantum safe shared key along with a cipher-text value and a message authentication code (MAC)-tag value associated with the subscriber;
• applying a quantum safe cryptographic technique on the encrypted quantum safe shared key;
• and
• generating a decrypted quantum safe shared key for authenticating the subscriber, based on the applied quantum safe cryptographic technique.

A user equipment (UE) for performing secure primary authentication of a subscriber, the UE comprising:

• a transceiver;
• memory;
• at least one processor coupled to the transceiver, and configured to:
• apply a quantum safe cryptographic technique on a quantum based public key associated with a home network;
• generate a quantum safe shared key and encrypted quantum safe shared key based on the applied quantum safe cryptographic technique;
• and
• transmit, to a network entity, the encrypted quantum safe shared key along with a cipher-text value and message authentication code (MAC)-tag value associated with the subscriber for authenticating the subscriber.

A network entity for performing secure primary authentication of a subscriber, the network entity comprising:

• a transceiver;
• memory;
• at least one processor coupled to the transceiver, and configured to:
• receive, from a user equipment (UE), an encrypted quantum safe shared key along with a cipher-text value and a message authentication code (MAC)-tag value associated with the subscriber;
• apply a quantum safe cryptographic technique on the encrypted quantum safe shared key;
• and
• generate a decrypted quantum safe shared key for authenticating the subscriber, based on the applied quantum safe cryptographic technique.