You should read the TRESOR paper. It's amazingly well done and explains everything. They go on to try to attack it many ways and check its security. They then p

You should read the TRESOR paper. It's amazingly well done and explains everything. They go on to try to attack it many ways and check its security. They then patched a hypervisor with TRESOR, so that you can run any OS but still benefit from it. Really neat work. GP, thanks for posting that link. Debug registers are used for debugging, to set hardware breakpoints. They aren't really needed, as most debuggers use software breakpoints anyways.