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WolfieChristl's profile
Wolfie Christl
Wolfie Christl
Wolfie Christl
@WolfieChristl

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Wolfie Christl

@WolfieChristl

Researcher, writer, activist http://crackedlabs.org  | Tech & society. Tracking, surveillance, data economy, platform power, algorithmic decisions, datafication of work

Vienna
wolfie.crackedlabs.org
Joined March 2013

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    1. zeynep tufekci‏Verified account @zeynep 21 May 2020

      I had a discussion about high-end coffee machines and looked one up on phone (not buying one!). Only FB app on phone is WhatsApp. Went on computer (guest mode on chromebook) to Facebok and I saw the very very very first high-end coffee maker ad in my life. Any plausible path?

      177 replies 149 retweets 463 likes
      Show this thread
    2. Wolfie Christl‏ @WolfieChristl 21 May 2020
      Replying to @zeynep

      Same IP looks like a good guess. Plus, was there a FB pixel on the website you looked it up on the phone? Probably, yes. I guess, this way they also create deterministic links (based on device metadata they know from Whatsapp install). Plus, perhaps, some probabilistic stuff...

      3 replies 2 retweets 19 likes
      Wolfie Christl‏ @WolfieChristl 21 May 2020
      Replying to @WolfieChristl @zeynep

      Wolfie Christl Retweeted zeynep tufekci

      I don't have evidence, but I'm pretty sure FB pixel ingests the IP. In order to create household ID links and/or to feed it into their retargeting optimization algorithms (without advertisers having control over this).https://twitter.com/zeynep/status/1263625251260416002 …

      Wolfie Christl added,

      zeynep tufekciVerified account @zeynep
      Right, that's what I'm asking. Is it known that Facebook pixel will log IP and Facebook will allow targeting like that? I'm not asking if anyone knows this is a product on offer or known to be done? Not asking for the wildest theory. Is there an IP path? https://twitter.com/Bobhunt5/status/1263624098120433667 …
      Show this thread
      5:36 PM - 21 May 2020
      • 3 Retweets
      • 14 Likes
      • ɮʀǟռȶ Your Huckleberry C_Perry 🌾🦚🗽🕊✌️🏳️‍🌈 Nancy Dong Moritz S. Lindsey Barrett Jaime Pruitt David Andersen 💉💉💉🎉 𝙐𝙁𝙊 𝙂𝙚𝙧𝙧𝙮𝙢𝙖𝙣𝙙𝙚𝙧𝙞𝙣𝙜 𝙀𝙭𝙥𝙚𝙧𝙩
      2 replies 3 retweets 14 likes
        1. New conversation
        2. Wolfie Christl‏ @WolfieChristl 21 May 2020
          Replying to @WolfieChristl @zeynep

          Wolfie Christl Retweeted Wolfie Christl

          (when we where examining how Android apps transmit data to third parties, the FB SDK embedded in (third-party) Android apps even transmitted accelerometer/gyroscope sensor data to FB. No idea what they use it for)https://twitter.com/WolfieChristl/status/1217113277106356224 …

          Wolfie Christl added,

          Wolfie Christl @WolfieChristl
          The examined apps transmitted data to many widely unknown data firms, but also to well-known tech giants. Most apps transmitted data to Google+FB. ➡️Also, FB received accelerometer/gyroscope sensor data, and Amazon received GPS coordinates 🤔 p15+35+52: https://fil.forbrukerradet.no/wp-content/uploads/2020/01/mnemonic-security-test-report-v1.0.pdf … pic.twitter.com/3ahPA92RyI
          Show this thread
          2 replies 9 retweets 7 likes
        3. Florian Wagner‏ @_fl01 21 May 2020
          Replying to @WolfieChristl

          Could be used to identify individuals by unique device holding / moving patterns.

          0 replies 0 retweets 1 like
        4. End of conversation
        1. New conversation
        2. Wolfie Christl‏ @WolfieChristl 22 May 2020
          Replying to @WolfieChristl @zeynep

          For the sake of completeness, it might be interesting to take look at: - Whether the website appears in the Off-Facebook Activity log (perhaps with a delay) - Device/browser metadata and IPs listed in 'download your info', especially 'where you're logged in' + 'used IP addresses'pic.twitter.com/bcscuuBRjn

          1 reply 0 retweets 0 likes
        3. Wolfie Christl‏ @WolfieChristl 22 May 2020
          Replying to @WolfieChristl @zeynep

          Wolfie Christl Retweeted Serge Egelman

          Anyway, FB now claims to maintain 2 kinds of user data 1) data linked to user accounts 2) data 'disconnected' from accounts. An incognito site visit may be part of the latter, retargeting then based on probabilistic 'optimization'. +excellent source here:https://twitter.com/v0max/status/1263810103850856451 …

          Wolfie Christl added,

          Serge Egelman @v0max
          Replying to @WolfieChristl
          Pixel is absolutely collecting IP addresses for this purpose (in addition to full HTTP headers): https://www.facebook.com/business/m/privacy-and-data?Data-Use-&-Ads … Here's a list of other data they recommend be sent with Pixel for matching purposes (in case the other fingerprinting fails): https://developers.facebook.com/docs/facebook-pixel/advanced/advanced-matching/ … pic.twitter.com/VMYuEsltcH
          0 replies 0 retweets 4 likes
        4. End of conversation

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