... I'd love to hear ideas about how this could be possible if you think we're mistaken
(The following probably isn't what you had in mind by "fully validate", but I think it puts it considerably closer to the challenge of defeating binary validation. Assuming everything has to happen in the app, infallible validation is impossible anyway.)
You would get pretty far by introducing internal data validation routines and making them compare the output of these routines based on challenges they issue to one another. That would require any attackers to introduce new code paths to defeat it. I've no idea if this can be negotiated practically over GC, but I can only assume so.
Also, I take issue with this:
There's no leaderboard, nor even a long-term score in Letterpress. This cheat doesn't matter.
I don't really care about leaderboards. I do care about the experience I have when I'm actually playing the game. I know this was probably meant in the sense that the incentive is lacking, but I disagree. Some people enjoy ruining other people's fun. The worst experience I've had was hack-enabled griefers in a cooperative game.
(The following probably isn't what you had in mind by "fully validate", but I think it puts it considerably closer to the challenge of defeating binary validation. Assuming everything has to happen in the app, infallible validation is impossible anyway.)
You would get pretty far by introducing internal data validation routines and making them compare the output of these routines based on challenges they issue to one another. That would require any attackers to introduce new code paths to defeat it. I've no idea if this can be negotiated practically over GC, but I can only assume so.
Also, I take issue with this:
There's no leaderboard, nor even a long-term score in Letterpress. This cheat doesn't matter.
I don't really care about leaderboards. I do care about the experience I have when I'm actually playing the game. I know this was probably meant in the sense that the incentive is lacking, but I disagree. Some people enjoy ruining other people's fun. The worst experience I've had was hack-enabled griefers in a cooperative game.