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I have an Android APP with millions of users, but some users are malicious users (robot, fake, etc) ... I want to find a way to uniquely identify each mobile phone device, in order to blacklist malicious mobile phone (hardware).
While your underlying problem is not really known (see XY problem)
I think your approach to solve it is wrong in the first place. ...
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No. After all, the launcher is an application. If you ban applications from starting your activity, you ban the launcher from starting your activity.
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TL;DR: Don't worry, your phone is not hacked.
Essentially they send you a tracking link and they know from which IP address this linked was accessed. They then can match this IP address to a rough location and might defer from the IP address your ISP. This is the kind of information which are visible by any website your visit, i.e. these are not actually ...
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Your best option is simply to keep everything as up-to-date as possible.
Your example of choice is what is known as a 0-day exploit. Of course once the software provider learns about it and fixes it, it is no longer an zero-day, and the solution is simple: upgrade your software to the latest (protected) version. Before the software vendor learns about the ...
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There will always be a way to spoof the data even if you could use imei.. it can be spoofed... I usually use a unique ID, UsrName, MAC, IP, operating system, screen size and a long 'transaction token' (this token changes over time, in each login and when other values change it gets reset every login also) this is used to verify the users identity and as an ...
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