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Facebook Confirms Data Breach

another random user writes "A researcher by the name of Suriya Prakash has claimed that the majority of phone numbers on Facebook are not safe. It's not clear where he got his numbers from (he says 98 percent, while another time he says 500 million out of Facebook's 600 million mobile users), but his demonstration certainly showed he could collect countless phone numbers and their corresponding Facebook names with very little effort. Facebook has confirmed that it limited Prakash's activity but it's unclear how long it took to do so. Prakash disagrees with when Facebook says his activity was curtailed." Update: 10/11 17:47 GMT by T : Fred Wolens of Facebook says this isn't an exploit at all, writing "The ability to search for a person by phone number is intentional behavior and not a bug in Facebook. By default, your privacy settings allow everyone to find you with search and friend finder using the contact info you have provided, such as your email address and phone number. You can modify these settings at any time from the Privacy Settings page. Facebook has developed an extensive system for preventing the malicious usage of our search functionality and the scenario described by the researcher was indeed rate-limited and eventually blocked." Update: 10/11 20:25 GMT by T : Suriya Prakash writes with one more note: "Yes, it is a feature of FB and not a bug.but FB never managed to block me; the vul was in m.facebook.com. Read my original post. Many other security researchers also confirmed the existence of this bug; FB did not fix it until all the media coverage." Some of the issue is no doubt semantic; if you have a Facebook account that shows your number, though, you can decide how much you care about the degree to which the data is visible or findable.

16 of 155 comments (clear)

  1. Phonebook by Nerdfest · · Score: 4, Insightful

    A friend sent me an email a couple of years ago saying "Did you know that you have your phone number on FaceBook?". I said "Yes, I also have it in the phonebook".

    1. Re:Phonebook by bondsbw · · Score: 4, Insightful

      Actually, I just looked and noticed that Facebook has my phone number. I don't remember ever giving it to them, since I specifically don't want them sending me text messages (I don't have a texting plan and each text is a charge).

      When I click to remove it, it says "You will no longer be able to use this phone to receive notifications or upload any photos and videos to Facebook."

      Perhaps they got my number because I installed the app on my phone? I just don't remember explicitly giving it to them.

      --
      All my liberal friends think I'm a conservative, all my conservative friends think I'm a liberal.
    2. Re:Phonebook by Anonymous Coward · · Score: 5, Funny

      Phonebook? Is that like an e-book on your phone?

    3. Re:Phonebook by Crayon+Kid · · Score: 4, Interesting

      You probably don't remember this, but when you first started using the Facebook application on your phone you had to confirm your phone number. You probably got a text with a code you had to enter or something like that.

      You can remove the number, as you noticed, but I'd be really skeptical whether they actually remove it. I suspect they don't, since it's a great way of tracking people across multiple accounts. As you experienced yourself, people often forget that they made Facebook aware of their personal phone number at some point in time.

      Consider for example the case of someone who becomes more privacy-aware, closes their initial FB account then later opens another when where he is more guarded about who he friends and what he publishes. And he thinks he's leaving less of an online footprint... when in reality I bet FB is tying it all in with his previous account.

      --
      i ate crayons when i was a kid and now i have two braincells and the blue ones taste nicer
    4. Re:Phonebook by Thruen · · Score: 5, Insightful

      The phone book doesn't have my cell phone number, or most other peoples' cell phone numbers, but that is what Facebook has most of the time. The phone book doesn't have photos of me, my friends, and my family so as to positively identify me from anyone else in the world who might share my (relatively common) name. The phone book doesn't not allow me to find people by interest so I can find people to call and sell my products to. The phone book requires you to know pretty specifically who you are looking for in order to find them without using the trial and error method. Oh, and lastly, you know the phone book is going to list your number unless you do something about it, and many people choose not to have their number listed, Facebook was never supposed to list your number and so people gave it to them expecting it to remain private. So, while you might not care that Facebook decided to show your number, plenty of people would be bothered by it. It isn't the end of the world or anything, but to downplay it and equate it to having your number in the phone book is a just a bit crazy. Oh, and a point I nearly forgot, lots of teenagers have their cell phone numbers in their Facebook accounts, and without tackling why they shouldn't to begin with, those numbers should definitely not be available publicly.

  2. So? by backslashdot · · Score: 4, Insightful

    Remember phone books? It used to be possible to match people with not only their phone number but their home address too.

  3. Need a Survey / Cognitive Risk by retroworks · · Score: 4, Interesting

    It would be really interesting, as a kind of control group, to ask a statistically represented sample of people how alarmed they are, on the basis of 1-10, about the following: 1) Their name is in the phone book, 2) The government has their Social Security Number, 3) Their face is recognizable by the bank ATM camera, 4) their neighbor has a X% chance of receiving their mail in the wrong mailbox. Throw in the word "breach" and watch the fur fly.

    --
    Gently reply
    1. Re:Need a Survey / Cognitive Risk by Minwee · · Score: 4, Funny

      Then you'd be surprised at how many databases your groin has been in.

  4. One teensy weensy difference... by Viol8 · · Score: 5, Interesting

    Phonebooks were generally only easily available in the area you lived in and not accessable by Vlad in Minsk who wants to collect as much data as he can on you to impersonate you to a bank. Not only that , but once data is on a computer a lot of things can be automated. When its in barely readable type in a large book its a bit more effort.

    1. Re:One teensy weensy difference... by Minwee · · Score: 5, Informative

      It's a good thing there are no phone books on the Internet, isn't it?

  5. Anecdote Time! by eldavojohn · · Score: 5, Interesting

    Remember phone books? It used to be possible to match people with not only their phone number but their home address too.

    Ah, yes! And let me tell you a story about that! I used to have a very common name. So common that according to the latest census there are 40,000 of me walking around the United States (first and last name). I have met myself (first, middle and last) four times and the second time I met myself I was 19 and he was 20 and he said to me: "Don't you ever let your name be published in the phone book" (as advice from one being raised in a major metropolis and I being raised in a very small town) and then went on to describe at length how, when he turned 18, he started receiving odd phone calls from credit card companies demanding he pay up tens of thousands of debt. After months of harassment, he finally got it all straightened out with one of the credit bureaus who then basically had to show the credit card companies that his records and the records of the real person they were looking for were completely different. The other odd thing was that the address the credit card companies had on file had the same exact abbreviations as his address in the phone book and the person had "moved" to that address right when my friend turned 18 and had his name put in the phone book.

    Is it a common problem? Maybe not ... but I'd just as well keep as much of my life private as possible ... to avoid whatever creative scofflaw there might be out there.

    --
    My work here is dung.
    1. Re:Anecdote Time! by SIR_Taco · · Score: 4, Funny

      ...

      I used to have a very common name. So common that according to the latest census there are 40,000 of me walking around the United States (first and last name). I have met myself (first, middle and last) four times and the second time I met myself I was 19

      ...

      John Jacob Jingleheimer Schmidt? That's my name, too!

      --
      I say don't drink and drive, you might spill your drink. Before you get behind the wheel just stop and think.
  6. What Do You Mean by "Data Breach" by Anonymous Coward · · Score: 5, Insightful

    The *only* difference between a "data breach" and their normal business model is that Facebook didn't get paid.

  7. misleading by tero · · Score: 5, Insightful

    So this is not about breaching phone numbers data that are set to private. This is about finding publicly published phone numbers through the normal search.

    Meh. Phonebooks didn't even have privacy policies back in the day.

    A more valid complaint might have been the ever changing default settings and user interface "improvements" which make finding the said settings very hard.

    But even then, this is not really post-worthy.

  8. I just refused to install the Facebook app by bdwoolman · · Score: 4, Informative

    I grudgingly use Facebook (Forcebook, Farcebook, Facebroke, Facebork) because so many of my real friends from overseas postings here and there can be found on it. They move around, too, and, well, it just makes sense.. My Android phone just offered me the opportunity to install the FB app when I checked an email message from Facebook -- A friend request from a German pal of mine from my days in Armenia (See?) He's in Uraguay it seems. Well, when I was ready to do the install I read the permissions list.Holy privacy invasion, Batman! It was going to do all the crap I painstakingly don't let the creepy site do on my web browser (it is a battle). And then it was going track my location to boot.

    Bondsbw, you so gave them permission to have your phone when you installed that app. Moreover, you also gave them permission to marry your firstborn child off to the evil sorcerer Zuck when he or she comes of age. (The sorcerer swings both ways.) Oh, I forgot F*ckedbook.

    --
    "No fear. No envy. No meanness." Liam Clancy
  9. Yes, let's put a billion eggs into this basket by sootman · · Score: 4, Informative

    Businessweek: What's possible at a billion-plus users that wasn't possible at, say, 500 million?

    Mark Zuckerberg: There are two ways that I look at this. There's what we can build internally and then there's what can be built externally using Facebook. I'll start with the external stuff... when we were at half a billion people, you got these large-scale services like Skype or Netflix (NFLX) that also had big user bases. And we weren't yet at the point where the majority of their users were Facebook users, so they couldn't really rely on us as a piece of critical infrastructure for registration. A lot of startups did, but the bigger companies couldn't. Now really everyone can start to rely on us as infrastructure.

    http://www.businessweek.com/printer/articles/74456-facebooks-next-billion-a-q-and-a-with-mark-zuckerberg

    The problem isn't that the data exists. (As others are pointing out with phonebook analogies.) The problem is that the data--your data--isn't safe. Not that it's totally safe anywhere, but FB seems to have had more than their share of problems.

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