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We studied the following online dating applications: By de-anonymization we mean the user’s real name being established from a social media network profile where use of an alias is meaningless.First of all, we checked how easy it was to track users with the data available in the app.It seems just about everyone has written about the dangers of online dating, from psychology magazines to crime chronicles.

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In Happn for Android there is an additional search option: among the data about the users being viewed that the server sends to the application, there is the parameter fb_id – a specially generated identification number for the Facebook account.

The app uses it to find out how many friends the user has in common on Facebook.

The attack is based on a function that displays the distance to other users, usually to those whose profile is currently being viewed.

Even though the application doesn’t show in which direction, the location can be learned by moving around the victim and recording data about the distance to them.

As a result, an attacker can end up with the email addresses not only of those users whose profiles they viewed but also for other users – the app receives a list of users from the server with data that includes email addresses.

This problem is found in both the Android and i OS versions of the app. Some of the apps in our study allow you to attach an Instagram account to your profile.The information extracted from it also helped us establish real names: many people on Instagram use their real name, while others include it in the account name.Using this information, you can then find a Facebook or Linked In account.Although Badoo uses encryption, its Android version uploads data (GPS coordinates, device and mobile operator information, etc.) to the server in an unencrypted format if it can’t connect to the server via HTTPS.The Mamba dating service stands apart from all the other apps.If the app included an option to show your place of work, it was fairly easy to match the name of a user and their page on a social network.

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