Is there a way to use server time to time prevent cheating?

Scripting
1

Hey guys! Im working on an upgrade system in my game which uses the real time to tell if an upgrade is finished or not and also I cant use the phones local time (yes its a mobile game) because if I do and people find out… well than its gamebraking. Also I can’t find any examples in C# and all of them are like 3 years old. So anyways its a good idea to refresh this.

I dont have a code written yet but maybe you guys can give me some examples or there is an article i need to read.

Any help will be apritiated.

2

I can’t find the link but if you search the forum there was a similar question about people slowing their devices so they could get the top score. I think it was something like slow hack. The dev was looking at validating time as well. I think the only way was to have it connect to a server & check the time periodically.