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Archive for the ‘Privacy’ Category


New Website

Posted by: Matt  /  Tags:

In the past I have been blogging over at Binary Intelligence, a joint blog shared with co-worker Jim O’Gorman. Both Jim and I have been busy with work and other projects and have somewhat outgrown the site. I wanted a place where it would be easier to post content that included videos, custom scripts and code, and other downloadable items that didn’t work out so well on a site hosted by Blogger.

I’ve imported most of the content from Binary Intelligence over to here, but because of the way the import works every post lists me as the author. Keep in mind that anything written prior to this post (May 23rd) may have been written by Jim. Binary Intelligence will most likely be dormant, but may see a post every now and then.

Hopefully this new format works out as well I would like it to.

What Can Happen With Just an IP Address

Posted by: Matt  /  Tags:  /  Comments: 1

After the Facebook post last week, much of the backlash consisted of, “Who cares if someone has my IP address? That information is almost always out there.” Well, here is a great example of what someone can do with an IP address.

Here’s something to really think about.. I was able to obtain all of the information in this post for 16 cents and by just using an email and IP address from a piece of spam.

Family members, ages, schools, anniversary dates, marriage lengths, hobbies, interests, phone numbers, addresses, property records, property taxes, pictures of their house, pictures of them, pictures of their children and grandchildren, deeds on their house, bankruptcies, employment history, previous addresses, previous creditors, and bits of social security numbers.

I’m pretty sure I’d be able to fake my way through one of those password reset forms.. you know, where you set up a “secret question” asking what your dogs name was, or where you went to school?

Beyond that, I’m fairly confident that at this point, if I were to call his bank and pretend to be him, I could easily pass when they asked me personal questions.

Facebook Leaks IP Addresses

Posted by: Matt  /  Tags: ,  /  Comments: 27

Update: It looks like Facebook fixed the default behavior of the sent emails. Your IP Address is no longer included in the notification emails. I will give Facebook credit that they solved this in less than 24 hours. Now, if they can just shore up some of the other issues…

Original Post:

Facebook has nice email notifications whenever a friend comments on your status, sends you a message, or a variety of other reasons. The emails have subjects similar to “John Doe commented on your wall post.” The unfortunate thing is that this email also appears to contain John Doe’s (or your other friend’s) IP address.

The email headers contain a line similar to:

X-Facebook: from zuckmail ([MTAuMzAuNDcuMjAw])

Copy this line out and feed it to this page:

http://www.myiptest.com/staticpages/index.php/trace-email-sender

You will get the IP address of your friend and clicking on it will get a geolocation-based map. This will also show you if your friend used their cell phone to post and who they use as their service provider.

This information is great when a fugitive is taunting law enforcement through their Facebook page, but not when a wife is trying to hide from an abusive husband and assumes Facebook is the best form of communication.

This isn’t the end of the world compared to some of Facebook’s other privacy problems, however, there is simply no need for Facebook to include these IP addresses and it should be quickly fixed.

Guide to Changing Your Facebook Privacy Options

Posted by: Matt  /  Tags:

Facebook is rolling out the new Privacy options today. There are a couple good things and a couple bad things. I suggest reading this article by the EFF for a good breakdown on the new changes. Sadly, your friends still have some bearing over how your information is used. In my opinion, Applications still get way too much leeway on what personal information they are able to see, collect, and use.

To maximize your privacy, I suggest the following changes. This guide should walk you through each screen and make sure you don’t miss anything important.

The basic Privacy Settings screen looks like this:
Start with the first group, Profile Information. There are several settings to update and every choice within this group should be set to “Friends Only”. You’ll have to click the Edit Settings button for Photo Albums and set each album to “Friends Only” as well.

The next group is Contact Information. This is how my settings look, but you may want to adjust for your own tastes.


The next group is Applications and Websites. The options here are:
For “What you share”, click on Learn More and you’ll see an info screen. Click the link in the very last sentence or just go here.

Click on “Edit Settings” for each application. Change the options to “Friends Only”. You might want to look at the “Additional Permissions” to see if the application can post to your stream.

Also, on the top right of this screen there is the drop down box labeled “Show”. Make sure you go through all of those screens so that you don’t miss any applications.

A quick note about Applications… make sure you delete any Applications you aren’t using. Every application has access to your personal information and this really isn’t a good thing. Take it straight from the creator of Mafia Wars.

The next group within Applications and Websites is “What Your Friends Can Share About You”. Uncheck everything and then click Save Changes.

The last two sections, “Blocked Applications” and “Ignore Application Invites” probably don’t need to be edited.

The fourth main section is Search. In this section you will need to Uncheck “Allow Indexing” and set “Appear in Search Results” to “Friends of Friends” or “Friends Only”. This section will help restrict the general public from finding your profile. Again, the point of this article and the settings presented is to protect your privacy.

The last main section is Block List and probably doesn’t need to be edited at this time.

Now we’ve walked through the main sections to protect your privacy. This is a great first step, but as the EFF article points out

Looking even closer at the new Facebook privacy changes, things get downright ugly when it comes to controlling who gets to see personal information such as your list of friends. Under the new regime, Facebook treats that information — along with your name, profile picture, current city, gender, networks, and the pages that you are a “fan” of — as “publicly available information” or “PAI.”

To help minimize what you’re sharing with the public, you’ll have to change some of this info as well.

To begin, click on “Edit My Profile” underneath your profile picture. Uncheck “Show my sex in my profile” and make sure the dropdown box underneath your birthday is set to “Don’t show my birthday in my profile”.

Next find the box on the lefthand pane that shows your friends. Click on the pencil and uncheck the box that says “Show my friends on my profile”.

Your profile picture is displayed publicly despite your Photo Album settings. If you’re not comfortable showing your picture to the world, change it to something else.

The final pieces of information will have to be removed entirely if you don’t want them publicly displayed. Current City, Networks, Recent Activity, and Fan Pages are all publicly available. I deleted everything (although I really didn’t have much to begin with).

To see how your new Profile looks to the public, click on Privacy Settings, Profile Information, and then Preview Profile. If there is any information displayed that you don’t want, go back through the settings and remove it. Again, some things must be manually deleted.

After following these steps, the only information I have publicly displayed is my name, my fake profile picture, and one Fan Page.


Good luck changing your settings. If there was something I missed, please let me know in the comments. If you have trouble changing a setting, let me know that as well and I’ll try to help you out.

News Story

Posted by: Matt  /  Tags: , ,

Here is a news story that Jim and I participated in on Facebook and securing your private information.

http://www.wowt.com/home/headlines/67332677.html

Facebook Security – Relying on Friends

Posted by: Matt  /  Tags:

Another article came along regarding Facebook security and hijacked applications. What I found most interesting was this quote:

On top of all these security issues, in August many Facebook users were surprised to discover the vast amounts of personal information they were revealing by their use of Facebook quizzes. Even if you limit access to your profile through privacy settings, Facebook quiz applications can see everything on your profile page when you take a quiz…or even when your friend takes one. To make matters worse, Facebook does not screen developers for trustworthiness nor do they require developers to comply with a privacy policy.

…or even when your friend takes one.” I’ve always thought that it’s kind of shady that quizzes and applications can access my friends’ personal data. I shy away from the apps and quizzes for this specific reason. But, are my friends providing me the same courtesy? By being on Facebook, am I putting my personal information security in my friends’ hands? Facebook has done better with increased privacy settings, and hopefully users have changed those settings to be more restrictive.

If I was a malicious user, I would absolutely create as many quizzes as I could that would take advantage of the automatic data mining capabilities of Facebook.

It seems like a recurring theme on this blog lately, but be careful of what you post online.

"Bad" Social Networking Links

Posted by: Matt  /  Tags: ,

Wow. We all know that social networking can be “bad”. Here are a few recent articles.

Burglary by the Tweets

Posted by: Matt  /  Tags:

It’s not hard to look around and see that people are posting way too much personal information online. There are tons of articles about it and now we can even find out if you’re gay or straight.

Most of the information seems harmless and a lot of people don’t care if others know about their personal lives. But how much trouble can it get you in to? One couple thinks their Twitter posts led to their burglary.

Is it that easy?! Let’s find out…

Chirpcity.com let’s you search tweets by location. I chose a random city from the list and then searched for all tweets mentioning “vacation”.


How lucky that the first result includes a potential victim. I don’t want to get a real person in trouble here and create a ready-made victim, so I’m blocking out all identifying information. Plus, I don’t think this person is actually going to be gone for five weeks during the school year as their Twitter feed also says they’re a student. See how quickly we can learn about someone?

Ok, so let’s go look at Twitter profile.


Now we’re getting somewhere. Our second webpage gave us their last name and website address. If we wanted to learn more we could check out their webpage to hopefully see what kind of stuff they might have we could steal. Now we just need to find out where they live. Cue Zabasearch.com!


This was the most recent entry was for this person. I blacked out all the personal info so it doesn’t look like much, but I now have a middle initial and possible address. I guess I could double check with other people searching sites. For a low monthly fee I could even subscribe to a data mining site and have instant information that includes much more than this!

Using free resources and five minutes of my time I located a potential victim and her address. I suppose it would be worth it to spend another 30 minutes and drive by the address to scope it out. Of course, if I really was a criminal I would have found multiple victims to go check out.

I guess it really is that easy. Be careful everybody!

Skype Replacement?

Posted by: Matt  /  Tags:

What does everyone use for instant messaging and VOIP? Skype is such a great product but has been plagued lately by some bad press.

It’s EULA has been plaguing people for a while and the new trojan causes worries as well. With all the lawsuits, will Skype even be around in two years?

Right now there seem to be more benefits than pitfalls, as communications are encrypted and it’s one of the most recognizable IM/VOIP platforms.

But for the future, are there any other good programs I should check out?

Researchers can ID anonymous Twitterers

Posted by: Matt  /  Tags: ,

Web sites that strip personally identifiable information about their users and then share that data may be compromising their users’ privacy, according to researchers at the University of Texas at Austin.

They took a close look at the way anonymous data can be analyzed and have come to some troubling conclusions. In a paper set to be delivered at an upcoming security conference, they showed how they were able to map out the connections on public social networks such as Twitter and Flickr. They were then able to identify people who were on both networks by looking at the many connections surrounding their network of friends. The technique isn’t 100 percent effective, but it may make some users uncomfortable about whether they should allow their data to be shared in an anonymous format.

Web site operators often share data about users with partners and advertisers after stripping it of any personally identifiable information such as names, addresses or birth dates. Arvind Narayanan and fellow researcher Vitaly Shmatikov found that by analyzing these “anonymized” data sets, they could identify Flickr users who were also on Twitter about two-thirds of the time, depending on how much information they have to work with.

From NetworkWorld.com.