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Are you asking how useful fingerprinting is, or are you asking how effective it is? For the former, any amount of fingerprinting lets ad companies make the cas

Are you asking how useful fingerprinting is, or are you asking how effective it is? For the former, any amount of fingerprinting lets ad companies make the case that their ads are better or worth more money. For the latter, the EFF Panopticlick research project seems to be pretty good at giving you an idea: https://panopticlick.eff.org/ https://panopticlick.eff.org/ I don't have an iPad/iPhone etc. to test Safari with; seems like they'd be amongst the most homogeneous of devices. Perhaps someone with one of those devices could tell us if the EFF can uniquely identify their device. It was able to uniquely identify all of my devices.

tokyodude 8y ago
The panopticlick site is hyperbole (or in other words poorly implemented). Since no one visits it it will tell you an iPhoneX in Los Angeles is 1 in a million. Their site doesn't take IP into account it's only the taking what it can get from the phone. Timezone for example and then all the normal fingerprints. And yet every iPhoneX is exactly the same. Calculate the penetration of iPhoneX and it should be more like 1 in 100 or 1 in 33 or even one in 20 not 1 in a million. It expires data which make sense but any site wanting to actually track you would need to be on popular sites. As such it would need a unique fingerprint. It won't get one for an iPhoneX which I'm just using as an example. you can choose any popular device.