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zeynep's profile
zeynep tufekci
zeynep tufekci
zeynep tufekci
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@zeynep

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zeynep tufekciVerified account

@zeynep

Complex systems, wicked problems. Society, technology, science and more. @UNC professor. @NYTimes columnist. My newsletter is @insight: http://www.theinsight.org 

floating in a most peculiar way
theinsight.org
Joined August 2009

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    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
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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. zeynep tufekci‏Verified account @zeynep 21 May 2020

      zeynep tufekci Retweeted

      I had been logged on my Facebook on the second computer. I literally have a Chromebook whose key purpose is for me to log on to Facebook in guest mode. (Part of my experiment in tracing these things). That computer has none of my accounts logged in. None. https://twitter.com/soupkitchen/status/1263623319946842113 …

      zeynep tufekci added,

      This Tweet is unavailable.
      7 replies 9 retweets 76 likes
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    3. zeynep tufekci‏Verified account @zeynep 21 May 2020

      zeynep tufekci Retweeted P.T.

      I know some will think it's the microphone but that's implausible (only FB app on phone is Whatsapp and I think we'd know) and also really burdensome (they are going to transcribe conversations?) and also why, why, why? Illegal, big risk, not necessary.https://twitter.com/proteantimes/status/1263623698520477697?s=20 …

      zeynep tufekci added,

      P.T. @proteantimes
      Replying to @zeynep
      Happened to me too. Some app on phone picks up from microphone.
      15 replies 6 retweets 85 likes
      Show this thread
    4. zeynep tufekci‏Verified account @zeynep 21 May 2020

      zeynep tufekci Retweeted "A Bloody Fucking Legend"

      I normally tell people exactly that, but I systematically look at every Facebook ad I get and make note of any new category. Absolutely the first high-end coffee maker ad I have seen on Facebook ever in my life in at least last decade of being on Facebook.https://twitter.com/sextoyspolitics/status/1263624187534405633 …

      zeynep tufekci added,

      "A Bloody Fucking Legend" @sextoyspolitics
      Replying to @zeynep
      So it's POSSIBLE that this is just the first time you've ever *noticed* a high-end coffee machine ad, because you had them on your mind, and our brains do work that way. But I would also not be at all surprised if this was a case of tech surveillance.
      6 replies 10 retweets 88 likes
      Show this thread
    5. zeynep tufekci‏Verified account @zeynep 21 May 2020

      zeynep tufekci Retweeted Bob Hunt

      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 …

      zeynep tufekci added,

      Bob Hunt @Bobhunt5
      Replying to @zeynep
      Facebook pixel on the coffee maker website
      15 replies 9 retweets 87 likes
      Show this thread
    6. zeynep tufekci‏Verified account @zeynep 21 May 2020

      zeynep tufekci Retweeted Robin Berjon

      Iphone (iOs), Safari, private mode. So the only thing I can imagine is the IP. Two separate machines/browsers and both browsers are not logged into anything and are in incognito/private mode.https://twitter.com/robinberjon/status/1263624507534856193 …

      zeynep tufekci added,

      Robin Berjon @robinberjon
      Replying to @robinberjon @zeynep
      (You say you looked it up on the phone but what with, browser, OS, etc.)
      9 replies 5 retweets 57 likes
      Show this thread
    7. zeynep tufekci‏Verified account @zeynep 21 May 2020

      zeynep tufekci Retweeted Steven M. Bellovin

      Right. Cross-device tracking. Though this was immediate. Look up - > ad. So I'm wondering if this is a product they sell? They just do it to increase ad relevance (free to advertiser?)https://twitter.com/SteveBellovin/status/1263625004442320902?s=20 …

      zeynep tufekci added,

      Steven M. BellovinVerified account @SteveBellovin
      Replying to @zeynep
      Both from home WiFi? Then it's the same IP address. Trying to link devices is a major goal for companies like Facebook; see, e.g., https://www.usenix.org/conference/usenixsecurity17/technical-sessions/presentation/zimmeck …
      10 replies 13 retweets 73 likes
      Show this thread
    8. Steven M. Bellovin‏Verified account @SteveBellovin 21 May 2020
      Replying to @zeynep

      My guess—I've never looked at their ad programs—is that they let advertisers target folks who have searched for a product. Then they use their own secret sauce to improve the cross-device tracking. Also unknown: has Facebook fingerprinted your devices?

      1 reply 0 retweets 4 likes
      zeynep tufekci‏Verified account @zeynep 21 May 2020
      Replying to @SteveBellovin

      Yeah. I'd love to know all this.

      5:27 PM - 21 May 2020
      • 2 Likes
      • LucieCM shoshana wodinsky (she/her)
      3 replies 0 retweets 2 likes
        1. New conversation
        2. shoshana wodinsky (she/her)‏Verified account @swodinsky 21 May 2020
          Replying to @zeynep @SteveBellovin

          good q for @Chronotope; does FB allow targeting by search via their own tech, or is this a third party thing that they’ve onboarded?

          1 reply 0 retweets 2 likes
        3. Aram Zucker-Scharff‏ @Chronotope 21 May 2020
          Replying to @swodinsky @zeynep @SteveBellovin

          IP registered in account, IP hits a pixel, join on IP, target with ad. That's pretty standard. Part of the package most DMPs sell too.

          0 replies 0 retweets 1 like
        4. End of conversation
        1. New conversation
        2. Gavin Sharp‏ @gavinsharp 21 May 2020
          Replying to @zeynep @SteveBellovin

          Fingerprint that can be compared between “signed out web hit” (even in incognito) and “signed in WhatsApp install” seems probable

          1 reply 0 retweets 0 likes
        3. Gavin Sharp‏ @gavinsharp 21 May 2020
          Replying to @gavinsharp @zeynep @SteveBellovin

          Doesn’t need to be 100% to be useful, could be heavily IP-dependent but also mix in e.g. device screen size

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. New conversation
        2. Steven M. Bellovin‏Verified account @SteveBellovin 21 May 2020
          Replying to @zeynep

          From the paper I cited: "The result of p=0.02 indicates that the null hypothesis should be rejected… the deviation of both distributions is statistically significant at the 0.05 level. This finding suggests that we successfully identified instances of cross-device tracking".

          1 reply 0 retweets 2 likes
        3. Steven M. Bellovin‏Verified account @SteveBellovin 21 May 2020
          Replying to @SteveBellovin @zeynep

          (Btw, although I'm a co-author, my then-PhD student did the interesting work on my side of the collaboration (two professors, each with a PhD student).)

          0 replies 0 retweets 2 likes
        4. End of conversation

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