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how can i locally detect iphone clock advancement by a user between app runs


how can i locally detect iphone clock advancement by a user between app runs  using -'iphone,objective-c,ios,clock,anti-cheat'

A common exploit in casual games is to artificially advance the system clock to jump ahead in gameplay.  How can such user clock advancement be detected by an app on an iOS device?


Must not involve network communication
Must not assume app is open (running or suspended) while clock is advanced
Must detect clock advancement, detecting clock rollback is not sufficient


Ideally, the solution would be robust against reboots, but that is not a requirement.
    
asked Sep 15, 2015 by Mil18C
0 votes
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