In the Tapsi hack, in addition to the information of passengers and drivers, hackers have also gained access to the information of users' devices (phones, tablets, etc.). Information such as application version and phone model and...

On the pretext of this incident, let's see what these parameters are?!
The googleAdId or AAID is unique for each device (+ for each Google user). That is, if you log in with two Google accounts on the same phone, each account has a unique AAID ID.

The next item is deviceId, which can be checked by checking the source of TPC, which is most likely used in the Android version of ANDROID_ID, which was unique for each user on each device in Android 8 and earlier.

Now imagine that you read the news or perform an activity anonymously (from your own point of view) in another application, and that application collects these two parameters from you (without the need for a special access level) for advertising purposes, statistics, etc. saves

By matching these identifiers in different services, it becomes clear that you who read news 1 and 3 in a certain news application, are the same user who uploaded a certain photo in a certain application, and you are the same user who went on such and such trips in Tapsi.

Leaks of information from different services make this matching possible for all the people who access these databases.
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Transcript for users who always ask after a data breach "What's the point of my data".

Additional explanation:
1. Every time the Android device is factory reset, the ANDOID_ID changes.
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2. You can reset GAID or AAID from the path below in Android.
Settings > Privacy > Ads. Tap Reset Advertising ID
Of course, applications usually take the new ID from your device and update it. But reset is recommended from time to time

Milad Nouri