What is "shadow profile" which is created arbitrarily without using Facebook

Many people now use social network services (SNS) such as Twitter and Facebook,More than half of high school students are using SNSThere is also data that there is, but the important thing there is "safety of personal information". Previously on FacebookPersonal information for 6 million people was full of appearanceA system bug fix was made because it became clear that in the course of that process, Facebook also collected personal information for those who have never used the service, and "Shadow profileIt was revealed that it was secretly creating the.

You Might Have an Invisible Facebook Account Even if You Never Signed Up
http://www.groovypost.com/news/facebook-shadow-accounts-non-users/

◆ What is "shadow profile"?
When you visit Facebook, you may be asked permission to access address books such as Gmail, Yahoo, Twitter, and Outlook with a message saying "Let's find friends who already use Facebook." When you allow it, Facebook will start searching for friends connected with you based on the data in the address book, but at the same time record all the address book data and create a "shadow profile" inside the system.


This shadow profile is something like "layer" function in Adobe Photoshop, for example. Although it does not appear on the screen of the computer that we usually see, it plays a secret role given in the server. And even if it is information not taught to Facebook, information provided by "third parties" such as Gmail and Yahoo will be accumulated in this "shadow profile".


Previously, it was possible to download the information gathered in this profile from the "download Facebook data" function, but it became impossible after bug fix. But Facebook continues to collect this data afterwards and even this profile has been created for those who have never created a Facebook account.

Facebook uses various methods to gather these information, but the threat of smartphones is among them. When installing the Facebook application on a smartphone, access to the address book, call history, location information, account information is required, but this is what Facebook is asking for. I have to put even an application ... ... but recently there are pre-installed Facebook applications or bundled on OS level.

ByMartin Hajek

◆ How can I protect privacy?
In a word, it can be called "impossible". Information will flow out when someone who has your information accesses Facebook and allows access to the address book. For questions asked by Facebook from Packet Storm, "Who owns personal information?"Answer "Information is not yours, but owned by a friend"doing.

The conclusion
Facebook's attempt is like reproducing (mapping) the actual human society's connection on one SNS. And the user can not display any intention about it. Although not only Facebook is doing such "mapping", it is a point that we should remember the fact that other companies in the same industry provide the user with an opt-out function to erase saved personal information.

A flow chart for checking whether there is a shadow profile is like this. Only when you have not made a facebook account in the past and you are not exchanging addresses etc. with people using Facebook, you are getting to "Your shadow profile has not been created" Most people seem to have to think that the "shadow profile" has been created by some reason ... ....