F07-MT: Yes
Rationale
The receiver verifies direct-message AEAD using the previously confirmed sender public key and its own private key. This proves the cryptographic sender under that key binding, not civil identity, freshness or universal trust in discovered NodeInfo.
Assessment method
Documentary and code analysis; no execution
Source context
Meshtastic official documentation / pinned firmware 8e6a88d
Outstanding qualification
Exercise confirmed-key, changed-key, forged-ciphertext and replay cases separately; this documentary decision does not establish freshness.