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This is interesting, though WebGL has been used for quite a while in fingerprinting efforts, though to what degree of accuracy I don’t know. Just know you’re able to be tracked pretty reliably while using countermeasures such as a VPN, tracker blockers, general hardened browser.
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Researchers use GPU fingerprinting to track users online - @billtoulas bleepingcomputer.com/news/security/
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unfortunately tracking by benchmarking is not something that's easily solvable. performance is usually more important than privacy, it's an eternal problem. pretty cool to see that you can benchmark invidual gpu cores though.