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Ask HN: Refusing all cookies, still targeted by ads. How?

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101–110 of 118 posts

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#101
post #91

You need tracker blocking extensions, and/or a "degoogled" version of Chrome like Thorium or Brave. My usual loadout is Thorium + the EFF's Privacy Badger extension, and sometimes UBO.

Extensions are blocked for "security and privacy concerns", and our internal systems don't work well with non standard browsers for some reason

[deleted]

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#102
post #91

You need tracker blocking extensions, and/or a "degoogled" version of Chrome like Thorium or Brave. My usual loadout is Thorium + the EFF's Privacy Badger extension, and sometimes UBO.

Extensions are blocked for "security and privacy concerns", and our internal systems don't work well with non standard browsers for some reason

Hmm, Thorium should be fine, at the very least? Its very close to vanilla Chromium/Google Chrome, with nothing that should mess up rendering.

There are also experimental Windows builds of Bromite (another Chrome fork that is very close to Chromium, but with a light built-in adblocker.)

https://github.com/uazo/bromite-buildtools#test-windows-vers...

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#103
post #14

Cookies was a simple concept that politicians could glom on to and legislate around, but, yes, they're quite unimportant in the grand scale of things. In the end, you've got two things to work with: Things you can convince the browser to actively identify itself with, and the things you can track regardless. Cookies are in the first category, but they are not alone. You can get things as simple as presenting an entir…

If a website uses local storage and submits tokens somewhere, the ad network only knows what a user does on that site, not all over the internet and it doesn’t know it’s you when it’s time to pick an ad.

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#104
post #100
post #43

Earlier quoted context omitted.

This is a critical thing that so many miss. If somebody has a website that doesn't use any cookies, but does send a POST request to www.bigcompanyanalytics.com/send-user-info with a body containing user-identifying information, then that is still illegal if the user has not consented to analytics (if they are in an area that requires opt-in for analytics). Cookies aren't really mentioned in GDPR or other privacy laws…

How does that work given that web servers have request logs that capture some identifying info? You already know some things about the user before you can even serve them the consent popup.

I’m not an expert on this, but perhaps it’s the usage of that data and linking to a person that crosses the line.

A web server’s logs may include the IP and http request they’ve made, but once you start attaching that to an identity instead it might count as data processing.

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#105

Earlier quoted context omitted.

I’ve been on a team doing fingerprinting research (specifically entropy sources). It’s amusing that you’re 100% unique and browsing HN commenting about fingerprinting. (You’re exactly a demographic that would be unique.) Most people aren’t unique, far from it. Consider iPhone 14 Pro Max users browsing through a 5G connection. All the users in the same cell look exactly the same. If I had to guess, based on what I kno…

I tried the amiunique fingerprinter with my iPhone, software updated to the latest version, stock Safari browser, and it said I was unique among all however many users had tried before.

If I remember correctly, that site was actually used to publish an early paper about fingerprinting. Their database is simply people who visit their site. You probably are unique among people who have visited! I doubt it sees much traffic anymore. This would explain the parent being unique also now that I think of it.

There are a few studies that used sites like that and got lots of traffic (by advertising on sites like HN) from non-normal users.

There was a landmark study done in France that measured fingerprints through a government website. The general population was much less unique.

Edit: found the AmIUnique paper: https://scholar.google.com/scholar_lookup?journal=Proceeding...

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#106

Earlier quoted context omitted.

I’ve been on a team doing fingerprinting research (specifically entropy sources). It’s amusing that you’re 100% unique and browsing HN commenting about fingerprinting. (You’re exactly a demographic that would be unique.) Most people aren’t unique, far from it. Consider iPhone 14 Pro Max users browsing through a 5G connection. All the users in the same cell look exactly the same. If I had to guess, based on what I kno…

I’m pretty skeptical of this of this fingerprint test. I’m on a 5G connection, in a major city with a completely default current gen iPhone, and it seems to think I’m 100% unique. Which I don’t believe for a second.

I responded to a similar comment at https://news.ycombinator.com/item?id=36424919

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#107
post #12

Fingerprinting. Everything about you that isn't identical to everyone else can be combined to guess who you likely are. Your exact browser version, OS, supported APIs, your IP address, your latency to Google servers... Anything that isn't a complete match to everyone else. You may have a new install, but your IP and latency match your old install. What are the odds you're not the same person? It's all probabilistic.…

To be clear, they don't need to know you by name and address, if you're AnonymousUser#7820300195 they still get to know what you were browsing, what interests you, and what you're likely to click on. In fact, knowing your actual personal details is probably a liability they don't need.

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#108

You need tracker blocking extensions, and/or a "degoogled" version of Chrome like Thorium or Brave. My usual loadout is Thorium + the EFF's Privacy Badger extension, and sometimes UBO.

Brave’s worse. It injects affiliate links without notifying users. Honestly, I can’t understand why do people still use brave as a “privacy browser”.

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#109
- IPs are relevant

- Your DNS server is relevant, especially if it's google's or cloudflare's or youe ISP's DNS

- ETags can be used like fingerprints

- LastModified can also be used for fingerprints

- Pragma can be abused for long-living fingerprints in your Browser Cache

- AdMob has ultrasonic support. Not kidding, ads can be delivered to your phone while you watch TV - via unhearable sound signals. [1] usually called uXDT or XDT.

- Chrome has multicast DNS support to discover surrounding devices (and Browser instances). Check DNS-SD for details, and what can be discovered.

- Also the data for Chrome's locally trained neural net (aka FLoC) is inside the profile folder but won't be cleared with Browser History.

- (unlikely) TLS fingerprint is usually coupled with User-Agent on the server side, so rotating your User-Agent is pointless if you don't change the TLS fingerprint (which you can't without recompiling the Browser Engine).

Welcome to the new world. I miss the good ol' HTTP/1.1 days.

[1] (German) https://de.m.wikipedia.org/wiki/Cross-Device_Tracking

Re: Ask HN: Refusing all cookies, still targeted by ads. How?

#110
post #15

I've noticed Google now syphons data from my searches to feed my youtube recommendations, always felt like two separate systems until about a month ago.

I was wondering about that, but I wasn't sure it was new. Are you using YouTube Premium?

Nah just a google account I only use for YouTube but don’t log out of. No email or maps usage only google search and heavy YT subscription and watch data.

Seeing things I search for on google, like very unrelated to normal YT viewing like specific tech queries show on YT.

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