DTLS is the general "drop-in" TLS for UDP. It does have limitations and compromises, esp. in regards to real-time media, but this does seem like a situation whe

DTLS is the general "drop-in" TLS for UDP. It does have limitations and compromises, esp. in regards to real-time media, but this does seem like a situation where it would not be especially difficult to send this data over a DTLS-secured channel which is logically separate from the media.