C03-RT: Yes
Rationale
The serial profile now explicitly enables secret IFAC with no public credential advertisement. Transport.handle_outgoing_ifac masks header and payload; Link payload encryption alone does not. The IFAC flag and tag remain visible. This credits control-field protection against a passive observer without the interface secret, not protocol invisibility or protection against an authorized interface peer.
Assessment method
Documentary analysis
Source context
Primary specification / selected profile
Outstanding qualification
Verify the selected serial configuration, secret handling and transmitted bytes. Quantify leakage and key-strength assumptions separately. No capture or cryptographic security audit was performed; IFAC changes no path/Link lifecycle semantics.