Tag Archives: privacy mirror

The continuing story of Privacy Mirror

I had let Privacy Mirror languish for a bit, and having found a free few hours, I decided to update Privacy Mirror to take advantage of Facebook’s Graph API. (For those of you not familiar with my Privacy Mirror experiment, it is a very basic app that explores what personal data apps can see via your friends.) Since I last updated Privacy Mirror, Facebook rolled out two major features. The first was the previously mentioned Graph API, which is a RESTful API that results Facebook data as JSON.

The second, and frankly the more interesting, was extended permissions. The newish extended permissions govern how apps can access data and how users are informed of this use.  It is these extended permissions at the bottom of the recent kerfuffle over Facebook allowing app developers access to phone numbers and addresses. (Ars Technica did a good job over covering this, and here is Facebook’s current response.)

Extended permissions work like this. First, an app developer encodes a request for access to various pieces of your profile data, as well as pieces of your friends’ profile data. Second, when you add the app to your profile, the app asks you for your permission. The following is a picture of what it looks like when Privacy Mirror asks for access to your and your friends’ information.

An example of extended permissions

It is crucial important to notice that you as an app user can only agree to the use of all the requested information (as opposed to individual pieces.) Also, the app user cannot say that the app can have permission to her own data but not that of her friends. (See my series “I ‘like’ you, but I hate you apps” for the implications of this coarse-grained control.) Third, once the app has your permission, it goes off and does what it doe

I have to say, I like the spirit of the extended permissions. I like the fact that developers must ask for permission and I like that users must grant that permission. But I am very troubled by the lack of granular control afforded to the user.

Also, Facebook has not addressed what I feel to be a much bigger privacy issue: the mistreatment of relationship between people and their apps. If I have an app and you don’t use the same app, then that app can only see the elements of your profile that you have allowed applications to see. (This is controlled via the Account > Privacy Settings > Apps, Games and Websites > Info accessible through your friends settings.) But if you and I both have the same app on our profile, then the app can see the elements of your profile that you can granted me access to see. In this sense, the app executes with my permissions based on our relationship. But you have a relationship with me, not my apps. This is subtle and remains an critical unsolved problem.

Opting-in to a relationship

My series of posts related to Facebook and The Washington Post has become very interesting today. Luke provided some insightful feedback on WaPo’s use of an iframe served up to provide a socially-connected experience, and in doing so he raised an interesting point. He said:

The opt-in question is interesting. Since no information is being transferred, it’s not clear that there’s anything to opt into. I think the social plugins work the same as myriad other plugins and ad networks around the internet, with the exception that it’s more obvious to the user what’s happening. If users needed to click a button in order to see personalized stories, then the vast majority wouldn’t get to experience the value that’s created.

For a little clarity here, the opt-in refers to The Washington Post’s Network News feature. If you opt-in (which was the default) you get the Facebook iframe which shows you friend activity with respect to the Post. If you opt-out, your version of www.washingtonpost.com doesn’t include the iframe.

Two points. First, the Washington Post’s decision to opt all of their users in by default is an awful one because it presents an asymmetry of relationship to people not prepared to deal with it. I have a relationship with WaPo. I have a relationship with Facebook. By opting me in, I suddenly see that WaPo and Facebook have a relationship and it seems to center around me. (Now in reality, it isn’t all about me, but from a user’s perspective it is.) This sudden presentation of relationship, even though no data is being passed, lacks a context and explanation that would make it more palatable, if not more desirous, to users.

Second, even though there is no data transfer, there very clearly is something to opt-in to: an N-way relationship. Me, the Washington Post, Facebook, and my friends who also read the Washington Post are all connected in the social graph once I opt-in. I’ll give Luke that no data is transferred, but by forming edges between between up-until-then disconnected nodes something new is created (a relationship) and users ought to have control over that. This is very similar to my Privacy Mirror findings. I have a relationship with my friends. I do not have a relationship with my friends apps, and likely I don’t want one. And yet, it seems that the social graph doesn’t make that distinction: an edge is an edge is an edge.

By revealing asymmetrical relationship and by opting me into a ready-baked relationship without providing choice leads to uncomfortable users to say the least.

In the end, this thread is more an illustration of how the transition to a social web cannot, should not, and must not be made in one bound. Websites like The Washington Post have to better educate their users about the richness of experience connecting to the social graph can bring while respecting user choice.

Follow-up on Facebook and The Washington Post

I’ve been getting a lot of comments on my post about Facebook and The Washington Post. I wanted to just write a brief follow-up on it. I had Luke Shepard of Facebook present at the Gartner Catalyst conference last week and through a bit of serendipity he found Tuesdaynight and my recent post. He kindly provided this clarification on what was going on:

The Washington Post still has no idea what your Facebook account is – the blue box is an iframe onto facebook.com, and it’s served entirely by Facebook. No information is transferred to the Wapo, and none of the rest of your activity on Wapo is linked back to Facebook, unless you explicitly choose to (by clicking the “Like” plugin, for example).

As I mentioned in my comment back to him, there were two things that threw me off. First, I didn’t realize how Facebook’s session management worked. FB sessions live on after you close the browser unless you explicitly log-off. This is no different than any other website. However, what is a bit different is that  sites with Facebook’s embedded iframe can take advantage of you departed-but-not-logged-out session and this is exactly what was happening on WaPo. Second, I have a problem with WaPo giving me a choice about Network News but not informing me about it. Furthermore, the default opt-in on the part of WaPo I think disrespects people’s desire for meaningful choice and control.

Thanks to Luke for providing a bit of insight and thanks to all of you how have commented on the previous post.

Waiter – there’s no (more) identity in my blog

Sorry to interrupt you attempting to set you Facebook privacy settings, but I have to tell you something. I’ve got me a new blog over at Gartner. You can get all my rambling goodness on identity management related stuff over there. As for the rants about privacy, they are likely going to stay here, but you never can tell.

Also, I am thinking of building a new version of Privacy Mirror to use the graph API. Any one have feature requests?

Facebook privacy revisited: Privacy Mirror version 2

Facebook’s recent changes to its privacy system has been garnering a lot of attention and not a lot of it is good. Both the EFF and Kaliya Hamlin (via ReadWriteWeb) have written up their takes on the matter and, all in all, I think they are decent assessments.

With all the supposed changes in Facebook’s privacy system, I decided to revisit my work with Privacy Mirror (you can catch the backstory: here and then here). Having retested PM with both friends and strangers, here’s what I’ve learned: Plus ça change, plus c’est la même chose.

The more things change, the more they stay the same.

Facebook’s inconsistent treatment of privacy still remains. In a nutshell, what a 3rd party developer can see in your profile, having been granted access to you via your friends, directly depends on whether you have the same application they do. If you and your friends use the same Facebook app, then the 3rd party developer will see your profile (and photos and posts, etc.) as if that developer was your friend. If you do not use the same Facebook app that your friend does, then the 3rd party application is subject to a different set of constraints.

I question whether the recent changes Facebook has instituted have even remotely satisfied Commissioner Stoddart’s concerns with Facebook, specifically 3rd party access to user information. Although users can control the scope of disclosure of their posts a bit better, defaulting settings to “Everyone” access as well as potentially making user’s social graphs public undermines any attempt to cast Facebook in a pro-user control light.

There’s also a nit I’d like to pick with the privacy settings system in Facebook – inconsistent save behavior. In some cases, Facebook automatically saves changed to privacy settings. In some cases, you have to press Save. This is a small point but it points to a larger issue. If service providers do not provide their users with meaningful, usable choices when it comes to controlling privacy and disclosure controls, but instead heap more controls in hard to find places, then these service providers have not aided their customers in the least. More user choices only equals more user control if those choices are clear, consumable, and centralized.

If you want to conduct some of your own testing of Facebook’s privacy system, feel free to play with Privacy Mirror. The following are new features I’ve added:

  • PM tests to see if the person your are pointing the Mirror at is a Privacy Mirror user. If they are you’ll get results based on their privacy settings with respect to you as a person. If they aren’t you’ll get results based on their privacy settings with respect to Privacy Mirror being a 3rd party application. This behavior is core Facebook Platform behavior which I feel is inconsistent and puts people at a disadvantage.
  • PM tries to find some photo albums that the person may have added
  • PM tried to find some photos that are tagged with the person in question
  • Added the ability to point the Mirror at a specific person better using their username
(Cross-posted from Burton Group’s Identity Blog)

Looking beyond the Privacy Mirror

Over the last two weeks, I have been using my homegrown Facebook application, Privacy Mirror, as a means of experimenting with Facebook’s privacy settings. Although Facebook provides a nice interface to view your profile through your friends’ eyes, it does not do the same for applications. I built Privacy Mirror with the hopes of learning what 3rd party application developers can see of my profile by way of my friends’ use of applications. I have yet to speak with representatives of Facebook to confirm my findings, but I am confident in the following findings.

Imagine that Alice and Bob are friends in Facebook. Alice decides to add a new application, called App X, to her profile in Facebook. (For clarity’s sake, by “add”, I mean that she authorizes the application to see her profile. Examples of Facebook applications include Polls, Friend Wheel, Movies, etc.) At this point, App X can see information in Alice’s profile. App X can also see that Alice is friends with Bob; in fact, App X can see information in Bob’s profile. Bob can limit how much information about him is available to applications that his friends add to their profiles through the Application Privacy settings. In this case, let’s imaging that Bob has only allowed 3rd party applications to see his profile picture and profile status.

After a while, Alice tells Bob about App X. He thinks it sounds cool and adds it to his profile. At this point if App X, via Alice’s profile, looks at Bob’s profile it will see not only his profile picture and status but also his education history, hometown info, activities and movies. That is significantly more than what he authorized in his Application privacy settings. What is going here?

It appears what’s going on is that if Alice and Bob both have authorized the same application, that application no longer respects either user’s Application Privacy settings. Instead, it respects the Profile Privacy settings of each person. In essence, App X acts (from a privacy settings point of view) as if it were a friend of Alice and Bob and not a third-party application.

Putting my privacy commissioner hat for a moment, I’d want to analyze this situation from a consent and disclosure perspective. When Bob confirms his friendship with Alice he is, in a sense, opting in to a relationship with her. This opt-in indicates that he is willing to disclose certain information to Alice. Bob can control what information is disclosed to Alice through his Profile Privacy settings and this allows him to mitigate privacy concerns he has in terms of his relationship with Alice.

What Bob isn’t consenting to (and is not opting in to) is a relationship with Alice’s applications. Bob is completely unaware of which applications Alice currently has or will have in the future. This is an asymmetry of relationship. It is entirely possible that Alice and Bob will have applications in common and once they do the amount of profile information disclosed (by both of them) to an application can radically change and change without notice to either Alice or Bob. Furthermore, it is unclear which Facebook privacy settings Bob needs to manipulate to control what Alice’s applications can learn about him.

This lack of clarity is harmful. It shouldn’t take a few hundred lines of PHP, three debuggers, and an engineering degree to figure out how privacy controls work. This lack of clarity robs Facebook users of the opportunity to make meaningful and informed choices about their privacy.

This experiment started after I read the Canadian Privacy Commissioner’s report of findings on privacy complaints brought against Facebook. This report raised significant concerns about third-party applications and their access to profile information.

As of the beginning of Catalyst (today!), Facebook has about 15 days remaining to respond to the Canadian Privacy Commissioner’s office, I hope that this issue about third party applications and privacy controls is meaningfully addressed in Facebook’s response.

(Cross-posted with Burton Group’s Identity Blog.)

Further findings from the Privacy Mirror experiment

I find that I rely on my debugging skills in almost every aspect of my life: cooking, writing, martial arts, photography… And it helps when you’ve got friends who a good debuggers as well. In this case, my friends lent a hand helping me figure out what I was seeing in my Privacy Mirror.

The following is a snapshot of the Application Privacy settings I have set in Facebook:

Facebook Application Privacy Settings

Given these settings, I would expect that the Facebook APIs would report the following to a 3rd party application developer:

  • My name
  • My networks
  • My friends ids
  • My profile status

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