this post was submitted on 01 May 2024
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server side anticheat is the only ultimate solution.
all client side anticheat measures will have vulnerabilities that will be found and people will cheat. (look at DMA pci cards, for instance)
How would a server side anti-cheat prevent a DMA exploit?
Don't send opponents location until they are visible for example. That way a wallhack won't work.
That literally doesn't work for faster fps games
it simply wouldn't trust the client with anything the player shouldn't know, to minimize cheating potential. valorant does this, and made a blog post about it. also, player movement could be analyzed server side to attempt to distiguish between cheating and legit.
I think client side invasive anti cheat is likely more effective than this, but its a cat and mouse game. if the anticheat was server side and good, there isn't anything to attack
The problem is, most game devs are lazy and would rather offload the expensive compute required to catch cheaters onto the client instead of coming up with server side methods that work. I follow a game dev on youtube, and that's one of the things he goes on about at times. Dude is a security researcher and had a lot of time doing that for Blizzard, so I'm pretty sure he knows his shit.
Also there's a fundamental fog of war of what your anti-cheat can see. Valorant cheaters are using hardware cheats, that literally takes in a video output, analyzes it, and sends in mouse inputs, on a different computer, the anti-cheat straight up can't see it, they only see there's a video out and a mouse in. Ultimately, having physical access of a hardware and you can just tell the software whatever you want it to see.