Mavlink Signing Support for PX4

Hello,

Packet signing of Mavlink messages is available in ardupilot, but the option seems to be not there
in PX4. Are there any development going in this direction?
I basically want to secure my connectivity between QgroundControl (or any other GCS) and
PX4 firmware using an added layer of authentication. Are there any other possibilities for the same?

Thanks in advance!
Ashwin