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PeerTube uses the BitTorrent protocol to share bandwidth between users by default to help lower the load on the server, but ultimately leaves you the choice to switch back to regular streaming exclusively from the server of the video. What follows applies only if you want to keep using the P2P mode of PeerTube.
The main threat to your privacy induced by BitTorrent lies in your IP address being stored in the instance's BitTorrent tracker as long as you download or watch the video.
In theory, someone with enough technical skills could create a script that tracks which IP is downloading which video. In practice, this is much more difficult because:
An HTTP request has to be sent on each tracker for each video to spy. If we want to spy all PeerTube's videos, we have to send as many requests as there are videos (so potentially a lot)
For each request sent, the tracker returns random peers at a limited number. For instance, if there are 1000 peers in the swarm and the tracker sends only 20 peers for each request, there must be at least 50 requests sent to know every peer in the swarm
Web peers are not publicly accessible: because we use the websocket transport, the protocol is different from classic BitTorrent tracker. When you are in a web browser, you send a signal containing your IP address to the tracker that will randomly choose other peers to forward the information to. See <x id="START_LINK" ctype="x-a" equiv-text="<a href="https://github.com/yciabaud/webtorrent/blob/beps/bep_webrtc.rst">"/>this document<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a> "/> for more information
The worst-case scenario of an average person spying on their friends is quite unlikely. There are much more effective ways to get that kind of information.
Your IP address is public so every time you consult a website, there is a number of actors (in addition to the final website) seeing your IP in their connection logs: ISP/routers/trackers/CDN and more. PeerTube is transparent about it: we warn you that if you want to keep your IP private, you must use a VPN or Tor Browser. Thinking that removing P2P from PeerTube will give you back anonymity doesn't make sense.
PeerTube wants to deliver the best countermeasures possible, to give you more choice and render attacks less likely. Here is what we put in place so far:
