I suggest to add libp2p protocol to encry the transfer, media library app support it. libtorrent won't accept and enable new protocol, such as webtorrent/webRTC protocol is still disable in libtorrent 2.x. May be libp2p protocol can be install as option just like uTP.

You can encrypt /dev/random and send it to /dev/null all day long if it makes you feel safer.

What is the problem you are solving? Does it exist? Do you understand it?

I request tixati support BTFS 4.0 - BitTorrent File System. If you are not interested in it, forget it.

what you want is Fopnu = https://fopnu.com/