1
vote
0answers
68 views

How to limit users of a service to a specific program

I have built an android game - I would like to add a "high score" leaderboard to it, such that people can show off how high they managed to score. How should I design it so that people can't "hack" it ...
2
votes
1answer
252 views

How to verify data from localStorage on a server

On my mobile app, I am storing the username of a logged in person, and downloading some data for the given/stored username. When the user checks for updates to his data content on the server, the ...