Aren't IP header fields granular enough for most tracking purposes? On mobile, you can do interesting things with Header Enrichment, which helps even more. IP

Aren't IP header fields granular enough for most tracking purposes? On mobile, you can do interesting things with Header Enrichment, which helps even more. IPv6 should "just work", but it seems there's fingerprinting available. That leaves residential IPv4, which you can solve with some coordination between site owners. This seems to say - Yes? https://www.sans.org/reading-room/whitepapers/testing/paper/33794 https://www.sans.org/reading-room/whitepapers/testing/paper/... https://en.wikipedia.org/wiki/TCP/IP_stack_fingerprinting https://en.wikipedia.org/wiki/TCP/IP_stack_fingerprinting Once you get some sort of fingerprint, then all that's needed is for one site to share with another and they're back to tracking across devices and sites.