Encryption - CESNET/UltraGrid GitHub Wiki

You can encrypt both video and audio with 128-bit AES CTR encryption. Simply pass --encryption option to both sender and receiver:

uv -t <vidcap> -s <audcap> --encryption <key_material> <receiver>

And to receiver to pass the same password

uv -d <display> -r <audio_playback> --encryption <key_material> <sender>

Please note that the encryption currently ensures only confidentiality. As a hash, CRC-32 is used, so it doesn't guarantee cryptographical integrity now.