Question: What mechanism does an IPX node use to integrity protect the modifiedDataToIntegrityProtect object when modifying attributes of the original HTTP message?
Option 1: Symmetric encryption with a shared secret key
Option 2: Digital certificates with public key infrastructure (PKI)
Option 3: Hash-based message authentication code (HMAC)
Option 4: Asymmetric methods with private/public key pairs using JSON Web Signature (JWS)
Explanation: According to the security architecture and procedures for 5G System, IPX nodes use JWS to integrity protect modified attributes. This involves asymmetric methods with private/public key pairs, where the IPX provider uses its private key to generate a signature representing the contents of the modifiedDataToIntegrityProtect object.