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Great thread on how ‘cookie syncs’ happen ⤵️ What’s not visible is what those ‘syncs’ enable: all the subsequent server-side personal data leaks 😬 This mechanism is at the core of programmatic advertising on the web 1/ @WolfieChristl/1488168017729138689On twitter.com
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Mood +3 🙂
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The multiple bidders (representing advertisers) competing in real-time to show you an ad on a page don’t necessarily have their trackers embedded. But thanks to RTB (real-time bidding) and ‘cookie sync’, they can identify you adopsinsider.com/ad-exchanges/cookie-syncing/ 2/Permalink On twitter.com
Mood +2 🙂
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On the web, there is no universal identifier (vs on Apps, there is with Apple IDFA and Android AAID). Then Adtech players are building matching tables (thanks to ‘cookie syncs’) to recognize you everywhere adtechexplained.com/cookie-syncing-explained/ 3/Permalink On twitter.com
Mood +1 🙂
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Note: ‘cookie syncs’ happen billions of times, everyday… but you can just use a browser who blocks 3rd party tracking (Firefox, Safari, Brave…). No more cookies, no more syncs 4/Permalink On twitter.com
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For Apps, what can you do? On Android, opt-out do ads personalization support.google.com/googleplay/android-developer/answer/6048248?hl=en#zippy=%2Chow-to-opt-out-of-personalized-ads 5/Permalink On twitter.com
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On iOS, go to Settings > Privacy > Tracking > Turn off “Allow apps to request to track” vox.com/recode/22404323/ios-14-app-tracking-transparency-opt-out 6/Permalink On twitter.com
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