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admin | Category: Trace A Phone Number | 08.01.2014
Facebook says it has patched a security hole related to a little-known phone number search within Facebook. Last Friday, independent security researcher Suriya Prakesh published a blog post in which he claimed that a€?98 percent of your phone numbers [on Facebook] are not safe.a€? In the post, Prakesh demonstrated that a brute-force attack could be used to lookup sequential phone numbers on Facebook and match them with their respective user names. But first, a little background: It seems as though not many people realize this, but if you know someonea€™s phone number you can usually easily look them up on Facebook. Let me explain, because (surprise, surprise) Facebook doesna€™t make that distinction very clear. When you add a phone number or an email address to your Facebook profile, you can choose whether it shows up to everyone, friends only, just yourself, or to a custom list of people. By default, this setting is set to allow everyone and anyone to search for your email address or phone number on Facebook to find your Facebook profile. So what Prakesh discovered was that Facebooka€™s phone number lookup, coupled with peoplea€™s ignorance of how Facebook privacy works (or rather, doesna€™t work), could be exploited using a few choice pieces of code.
Anyway, Facebook said Wednesday that it fixed thisa€“Prakesha€™s post now notes that he can no longer look up 10,000 phone numbers at a time. Facebooka€™s phone number and email address lookup feature has long been the stalkera€™s secret. Prakesha€™s exploit used sequential phone numbersa€“he didna€™t know the phone numbers of the people he was trying to find, he was just harvesting numbers.
The easiest solution is to not add your phone number or email address to your Facebook account. This is pretty easya€“and a lot of people do it, thinking it will make their information completely private.
After you make your email address and phone number private, you have to also make them unsearchable. Go to How You Connect > Edit Settings > Who can look you up using the email address or phone number you provided? Amazon Shop buttons are programmatically attached to all reviews, regardless of products' final review scores.
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Users can access Find Friends in Facebook for iPhone by clicking the Friends icon on the home screen, and then the arrow button in the top right corner.
These Facebook native mobile apps don’t allow users to edit their profiles, but the new updates can generate a special prompt asking users to add their phone number to their profile.

By encouraging users to add their phone numbers, Facebook is looking to become a sort of cloud-phonebook.
Just because you mark some of your Facebook data as private doesn't mean that you're hard to track down. Get a Printable Phone List of All Your Facebook Friends Tech Guides About Us Work 01 Dec 2007 Get a Printable Phone List of All Your Facebook Friends Create a phone directory of all your Facebook Friends in one click – it has the telephone numbers, name and profile pictures of your Facebook friends neatly arranged on one page ready to print. Specifically, the social network now limits the number of phone number lookups that any given IP address can perform on Facebook. Simply type the phone number into Facebooka€™s search bar and any profile associated with that phone number will pop upa€”even if that person has set their phone number to private. There are two different privacy settings associated with phone numbers (and email addresses) on Facebook: One relates to what shows up on your profile, and one relates to what others can use to look you up on Facebook.
And since many people assume that setting their phone number or email address to private on their profile means that ita€™s private, most people never realize they need to change this setting as well.
Facebook did say that, at the time of Prakesha€™s experiment, it had a system in place for a€?preventing the malicious usage of [its] search functionality,a€? but it has since tweaked the system to be a little more sensitive. I admit to using it a time or two when Ia€™ve been curious, or when Ia€™ve wanted to find someone who has a particularly generic name.
Facebook doesna€™t require a phone number (except for some features, such as two-factor authentication), but it does require an email address. On your About page, go to Contact Info > Edit (youa€™ll have to re-enter your password), and then check out the column on the right-hand side.
Our parent company, IDG, receives advertisement revenue for shopping activity generated by the links. When users import their contacts from their email provider, they’re shown a list of non-friends they can send requests or invites to join Facebook to.
Having stored someone’s number may be a better indicator of friendship than having emailed them, so these mobile iterations of Find Friends might help Facebook make more accurate friend suggestions than the web version. Software engineer Reza Moaiandin has learned that it's possible to scoop up the public details of legions of Facebook users simply by guessing phone numbers with a random number generator. Facebook tells The Guardian that it has "network monitoring tools" running to watch for suspicious data activity, and its developer kit rules limit just how (and how often) apps can scrape information.
However, the other privacy setting, which relates to what people can use to look up your Facebook profile, is tucked away in Facebooka€™s privacy settings, under How You Connect. I suggest setting up a a€?social networking-onlya€? email address to use just for Facebook and junk mail.

Next to each piece of contact info you have listed, click the little arrow and choose Only Me.
You cana€™t choose Only Me for this settinga€“but you can prevent people who are not your explicit Facebook friends from looking you up using a phone number or an email address. Because the buttons are attached programmatically, they should not be interpreted as editorial endorsements.
Thankfully, if that person is your Facebook friend – you can easily view his or her phone number by logging into your Facebook account.
Facebook also uses the data to power friend suggestions for both the person who uploaded the contacts and the contacts on the list. The prompt explains “When your number is on your profile, friends can use Facebook to call you. You see, the social network defaults to letting anyone search for you using your phone number, even if it's unlisted -- as there's no search limit, all it takes is a script to harvest the user IDs for thousands of people. The company could theoretically cut off access to an app if it grabs too many profiles too quickly. Contacts section of your Facebook profile show listing of Facebook friends along with their mobile phone numbers. While a fundamental part of to site’s growth and loyalty strategy, Facebook has also had to respond to German privacy concerns about the feature with changes. As you can imagine, there's a real worry that this will not only let black market dealers and hackers collect targets en masse, but help them get numbers to use for phone-oriented attacks and spying. The concern is that Facebook isn't explicitly tackling this problem by instituting firm caps on data collection.
Only friends who have chosen setting to show phone number to other Facebook friends will have phone number listing along with their name.See Mobile Phone number of friends on Facebook1. Even if it's not possible to circumvent the developer rules, nosy intruders might get lots of information before Facebook cuts them off. He loves building web apps and has also written for the Wall Street Journal & Lifehacker.

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