Question: In a Network Domain Security (NDS) Authentication Framework, what is a viable approach for signing an Operator's SEG CA or TLS CA certificates to establish trust, without requiring self-signing?
Option 1: Using a publicly trusted Root CA from a third-party Certificate Authority.
Option 2: Signing with the operator’s own Interconnection CA, leveraging its established trust point in SEGs and TLS entities.
Option 3: Implementing a new, isolated CA specifically for SEG and TLS certificates, not linked to existing trust structures.
Option 4: Relying on mutual discovery protocols to dynamically establish trust between SEGs and TLS entities.
Explanation: This approach is viable because using the operator’s own Interconnection CA, which is already a trusted point in the operator's SEGs (Security Edge Gateways) and TLS (Transport Layer Security) entities, simplifies the establishment of trust. Since this CA is likely pre-configured as a trust anchor within these components, signing the SEG CA or TLS CA certificates with it ensures seamless recognition and acceptance across the network, enhancing security without the complexity of self-signing or introducing external CAs.