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> almost 500 advertising categories Wait. Doesn't that just mean that google collects 500 bits of information about you? How is that not considered an ID? I do
by Zuiii 3y ago
> almost 500 advertising categories
Wait. Doesn't that just mean that google collects 500 bits of information about you? How is that not considered an ID? I don't understand.
- charcircuit 3y agoThe browser keeps track of he top 5 categories from this list of these 629 topics. https://github.com/patcg-individual-drafts/topics/blob/main/taxonomy_v2.md https://github.com/patcg-individual-drafts/topics/blob/main/... Other than when it returns a random topic, the browser only reveals a topic to a site if that site has observed the user on a site with that topic before. For an epoch a site can only get at most 1 topic. The browser will return topics for up to the last 3 epochs (the site only gets data for the epochs it has called the API in)
- cpeterso 3y agoI believe tropic interest is calculated locally by the (Google) browser, though it might be repeatable on the Google server side for users syncing their browsing history to a Google account. The Topics API itself only returns up to three topic IDs to websites, not 500 bits for all topics. But that still gives trackers up to 500 * 499 * 498 (124,251,000) topic combinations that can be paired with other fingerprintable user information like GeoIP, language, browser version, and operating system.