AFAIK TLS doesn't make such attempts simply because that would make it quite inefficient. However, if you're using Tor (like you probably should if you want pri

AFAIK TLS doesn't make such attempts simply because that would make it quite inefficient. However, if you're using Tor (like you probably should if you want privacy for online browsing) the exit-node that fetches the site for you gets the leaky packet size, and the Tor cell -packets that transit from the exit node to you are static size (500 bytes IIRC). The number of packets can of course be quite revealing too, but all simultaneous data transfer over Tor adds noise to end-to-end correlation on your end.