Possibly No Hacks For Black Ops ):

This is from an interview that Digital Spy had with Treyarch.

(Digital Spy) Plenty of games are full of glitches and hackers nowadays, Modern Warfare 2 is a clear victim. Therefore it's obvious that this is one of the communities key issues. They want a game that they can play without the hassle and frustrating of glitches and hacks plaguing online play. Can Treyarch solve this problem for Black Ops?

(Treyarch) Absolutely. That's one of the advantages of [Black Ops]. They all started coming out after World At War's development, they also started coming out pretty much at the end of Modern Warfare's development cycle, which didn't leave that much time to put in preventative measures, they left them chasing their tails in terms of patching it. Black Ops we've had plenty of time. We know how all those hacks are done, and we have preventative measures built into Black Ops built around those. Of course, hackers are very smart, they'll find new ways to break the game I'm sure, and when they do we'll have security