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A quick google image search to the domain http://sphotos.ak.fbcdn.net/photos-ak-snc1/v2010 http://sphotos.ak.fbcdn.net/photos-ak-snc1/v2010 gives me a large num

A quick google image search to the domain http://sphotos.ak.fbcdn.net/photos-ak-snc1/v2010 http://sphotos.ak.fbcdn.net/photos-ak-snc1/v2010 gives me a large number of images hosted there http://bit.ly/9Lp3r5 http://bit.ly/9Lp3r5 . This isn't the behaviour I would like.

iuguy 16y ago
Nice find. This is why it's 'not optimal' as Thomas puts it. Does anyone want to test what happens at different privacy settings? Sorry, I don't really use facebook.
tptacek 16y ago
This is presumably happening because people are deliberately taking images people gave them access to and embedding them on web pages Google is indexing. The difference between this and "People of Facebook", the site where you can upload images your friends show you on Facebook, is that Facebook can detect, track, and disable these images, but can't do anything technical about images uploaded to "People of Facebook". It is just silly to suggest that Facebook should take steps to prevent your friends from copying images. Nothing they do will work, and anything they do will create a false expectation of privacy on behalf of their users.
- skbohra123 16y ago
  I found something interesting, there are four options in facebook for sharing photos 1. everyone ( of course on facebook I thought) 2. friends ( of course on facebook) 3. friends of friends ( again of course on facebook) 4. only me ( :) ) . So I don't find reason for giving access to anyone not having a facebook account and hence taking off control of the content.
  - tptacek 16y ago
    You are stuck on this notion of publishing the link being "taking control of the content in ways the publisher didn't want" because you feel like you found this FBCDN link thing and it's captured your attention. But in fact you lost control of the content the moment you published it to your friends (or whomever) on Facebook. We're just talking about 2 numbers, one 136 bits long and the other 73,720 bits long. I don't think the difference between these two numbers is worth arguing about.
brlewis 16y ago
Click on any of those images and the sidebar will tell you what web site Google found it on. This isn't a Facebook security hole. It's people publishing photos on the public web.

iuguy 16y ago

Nice find. This is why it's 'not optimal' as Thomas puts it. Does anyone want to test what happens at different privacy settings? Sorry, I don't really use facebook.

tptacek 16y ago

This is presumably happening because people are deliberately taking images people gave them access to and embedding them on web pages Google is indexing. The difference between this and "People of Facebook", the site where you can upload images your friends show you on Facebook, is that Facebook can detect, track, and disable these images, but can't do anything technical about images uploaded to "People of Facebook". It is just silly to suggest that Facebook should take steps to prevent your friends from copying images. Nothing they do will work, and anything they do will create a false expectation of privacy on behalf of their users.

skbohra123 16y ago
I found something interesting, there are four options in facebook for sharing photos 1. everyone ( of course on facebook I thought) 2. friends ( of course on facebook) 3. friends of friends ( again of course on facebook) 4. only me ( :) ) . So I don't find reason for giving access to anyone not having a facebook account and hence taking off control of the content.
- tptacek 16y ago
  You are stuck on this notion of publishing the link being "taking control of the content in ways the publisher didn't want" because you feel like you found this FBCDN link thing and it's captured your attention. But in fact you lost control of the content the moment you published it to your friends (or whomever) on Facebook. We're just talking about 2 numbers, one 136 bits long and the other 73,720 bits long. I don't think the difference between these two numbers is worth arguing about.

brlewis 16y ago

Click on any of those images and the sidebar will tell you what web site Google found it on. This isn't a Facebook security hole. It's people publishing photos on the public web.