<story><title>Facebook Shadow Profiles [pdf]</title><url>https://www.cesifo.org/en/publikationen/2022/working-paper/facebook-shadow-profiles</url></story><parent_chain><item><author>kibwen</author><text>In the grim darkness of the near future, nobody leaves their house without painting their faces with CSAM in order to prevent cloud services from storing their images.</text></item><item><author>tacotacotaco</author><text>I was told by a friend that when they uploaded a picture with me in it Facebook auto tagged me. I have never created a Facebook or Instagram account. I want no business with that company. I am annoyed that I am still profiled by them.</text></item><item><author>slg</author><text>Facebook also has shadow profiles for non-users that connect directly to name, email address, and&amp;#x2F;or phone number.  At the very least these seem to be populated when people share their contact list with Facebook.&lt;p&gt;I have long wondered whether they can match these two kinds of shadow profiles together. One profile with personally identifiable information. The other profile with detailed browsing history. That would raise a huge privacy concern especially since these are non-Facebook users and therefore people who have not opted into this at any level.</text></item></parent_chain><comment><author>nikolay</author><text>People can be identified by way too many things - if you&amp;#x27;re Facebook and you buy all data available for sale and correlate and enrich it, then you&amp;#x27;re known forever and every step you make is also recorded and analyzed. Worst of all, they are those idiots who take pictures all the time and you eventually end up in pictures from many angles (all timestamped and geolocated). Combined with &amp;quot;anonymized&amp;quot; data from, say, carriers, you&amp;#x27;re no secret to anyone. But the biggest problem is that even if Facebook doesn&amp;#x27;t trace you, the governments will, and they have a lot more sources. Privacy is extinct!</text></comment>
<story><title>Facebook Shadow Profiles [pdf]</title><url>https://www.cesifo.org/en/publikationen/2022/working-paper/facebook-shadow-profiles</url></story><parent_chain><item><author>kibwen</author><text>In the grim darkness of the near future, nobody leaves their house without painting their faces with CSAM in order to prevent cloud services from storing their images.</text></item><item><author>tacotacotaco</author><text>I was told by a friend that when they uploaded a picture with me in it Facebook auto tagged me. I have never created a Facebook or Instagram account. I want no business with that company. I am annoyed that I am still profiled by them.</text></item><item><author>slg</author><text>Facebook also has shadow profiles for non-users that connect directly to name, email address, and&amp;#x2F;or phone number.  At the very least these seem to be populated when people share their contact list with Facebook.&lt;p&gt;I have long wondered whether they can match these two kinds of shadow profiles together. One profile with personally identifiable information. The other profile with detailed browsing history. That would raise a huge privacy concern especially since these are non-Facebook users and therefore people who have not opted into this at any level.</text></item></parent_chain><comment><author>namrog84</author><text>Too late. And even if did that. that could likely be deanonyimized with little effort.&lt;p&gt;For those who don&amp;#x27;t already know, it takes very few data points to deanonyimize someone&amp;#x27;s data.&lt;p&gt;With greater effort and efficiency you can have even less data points.</text></comment>