Question: In a 3GPP SAE (System Architecture Evolution) security architecture, when utilizing a pre-shared key (PSK) for key agreement, how is the Master secret for the Master SA typically derived?
Option 1: Directly from the PSK, without additional cryptographic transformations.
Option 2: Through a public key exchange protocol using the PSK as an identifier.
Option 3: By hashing the PSK with a randomly generated nonce.
Option 4: Via a certificate-based authentication process leveraging the PSK.
Explanation: In the context of 3GPP SAE security, when a pre-shared key (PSK) is used for key agreement, the Master secret for the Master SA is derived directly from the PSK, emphasizing the reliance on the secrecy and strength of the pre-shared key for security.