Securing of Materials and Shaders

I am curious on what people are doing with multiplayer games, in regards to securing the material datablocks and hlsl shaders, so that they can't be "changed" on clientside.

I realize with Materials, they could be moved to real datablocks again, but the amount of them would quickly hit the datablock limit and increase load times. The initial plan is just some sort-of encrypted package.

But for Shaders, they don't use the resource system for loading, so we're unable to do anything package wise