I wrote a very basic overview of watermarking, fingerprinting, timing analysis and supernodes for Bitcoin Magazine's last print issue, which is pretty much an unsolicited advertisement for why I think...
This is a much simpler alternative that achieves the same thing, and has a PR ready to be merged today. IMO you should promote review of this to get merged asap instead of dandelion which has been around as an idea for a decade.
https://github.com/bitcoin/bitcoin/pull/29415
https://github.com/bitcoin/bitcoin/pull/29415
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