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Web fingerprinting is worse than I thought

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Re: Web fingerprinting is worse than I thought

#201

When I switched off fingerprinting in this browser, the font size here on Hacker News changed. I suppose it just uses the user agent to set a certain font size, or does Hacker News track based on fingerprinting?

You mean `privacy.resistFingerprinting` in Firefox? I guess that disables custom font configurations.

Re: Web fingerprinting is worse than I thought

#202
post #4

It's important to know that the mentioned "resistFingerprinting" breaks a lot of the web. Examples include the back button, uploading photos on some websites uploads random data instead of the photo, etc.

It also breaks page zoom. The user's preferred zoom level for a domain isn't preserved between new-tab page loads, but resets itself every time.

(I'm guessing it was too much implementation work to separate out this feature: to preserve normal, expected UI behavior client-side, while presenting a fake pagezoom value to scripts. That would degrade only a handful of (poorly-designed, script-layout) websites, rather than the whole accessible browser experience).

Re: Web fingerprinting is worse than I thought

#203

Earlier quoted context omitted.

Chrome does give access to localStorage/sessionStorage in Incognito and this can be used to communicate between tabs on the same domain, but just like cookies and cache this data is wiped if you close the Incognito instance. It's certainly a mystery, because you'd expect any capability fingerprinting (some combo of UA, extensions, CPU/GPU specs, IP etc) to give an identical result between profiles, so it does seem th…

Then, could not we a get a trace of the properties it uploads to the server by analyzing what is executed in the javascript? Sure it has some sort of submit endpoint where it throws the individual values to.

POST https://fpa.fingerprint.com/?ci=js/3.8.10&ii=fingerprintjs-p...

It looks like it is using heavy obfuscation.

Re: Web fingerprinting is worse than I thought

#205
post #170

Earlier quoted context omitted.

The more you customize the more unique your session becomes.

Not if you disable JS, cause the website then can't see any of these customizations.

You are easily tracked without JS. It is much easier than tracking a default settings browser.

Re: Web fingerprinting is worse than I thought

#206

Earlier quoted context omitted.

WGET can be pretty trivially told to send custom headers.

Try to do that to a site with CF bot protection cranked up... Not happening without a custom build/custom ssl proxy that mimics the SSL fingerprint of Chrome.

CF blocks you hard simply for enabling "do not track" in settings. The discussion about how awful they are needs to be had.

Re: Web fingerprinting is worse than I thought

#207
Target and the model that found the pregnant girl (bad counter argument here: https://medium.com/@colin.fraser/target-didnt-figure-out-a-t...

There are three options:

1. Prevent/Stop it: This ship sailed long ago. Not to be grim about it but pandoras box got opened.

2. Fight it: Tool up, change your print, your behavior, your place. Build focused VM's that you use per topic. Simply do a WHOLE lot less. In the grand scheme, its a lot of work for low return. Note: there are exceptions.

3. Increase Noise: The whole point of most data collection is to sell more to you. Because most people are sheep, a fairly simple model can be surprisingly accurate (over targeting is an issue). Don't be a sheep, diversify, make more noise in the system, search out side your comfort zone and change it up often.

Re: Web fingerprinting is worse than I thought

#208

Earlier quoted context omitted.

Implying they actually stop tracking when you press "Reject"

They may not, but if you're in/from the EU and press "Reject" and they still track you, they're breaking the law.

"break the law" means nothing when you're a large corporation that makes more money from breaking it than you spend on fines.

Tech companies routinely get fined for what may seem like massive amounts to us.

https://www.businessinsider.com/the-7-biggest-fines-the-eu-h...

If "breaking the law" meant something they would try to avoid doing it so often.

Microsoft in the 90s was recognized guilty of abusing their monopoly. What were the consequences? nothing. This sort of thing used to mean something, see: Standard Oil v United States. But the current world is a world that belongs to megacorporations.

Tracking people against their will is a drop in the ocean of what corporations get away with.

This, in many ways, is like a billionaire getting a ticket that doesn't amount to more than the hundreds of dollars for bad parking. The billionaire doesn't care.

Law only has meaning when the punishment is coercive.

Re: Web fingerprinting is worse than I thought

#209

Surely if your website collects data using browser fingerprinting this is covered by GDPR and you have to tell your visitors/ask for permission? https://www.eff.org/deeplinks/2018/06/gdpr-and-browser-finge...

I believe that, despite their claims, this fingerprinting technique actually DOES violate the GDPR.

Re: Web fingerprinting is worse than I thought

#210
post #170

Earlier quoted context omitted.

The more you customize the more unique your session becomes.

Not if you disable JS, cause the website then can't see any of these customizations.

Having JS off probably puts you in the then you are not safe by just turning off JS.
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