Check if SharedObject file has been altered

Hey guys, I’ve set up a shared object using user_so.data.flashVar = value.

This works fine, but as it is being used to store details for saved games, users could easily edit their saved games to cheat their way through the game. Is there any way to check if a shared object has been altered outside of Flash, or are there any other methods of saving files in AS2 that I’m unaware of?

Any help would be great. Thanks!