Protecting games from memory scanners (like Cheat Engine)

Question

I'm making a C++11 game where scores are sent to the server. I'm storing the score as a simple float, so people using software like Cheat Engine could easily change the value of the score before it is sent to server.

How can I protect my game against this kind of attacks?

Answer 1

There are many options you can do but the best is to not accept any important values from the client. Have the server do all the calculation and than send the values to the client.