The practical way that people deal with this is putting a swarm of auditors all up in the processors' business. It used to be this way for telecom as well: to k

The practical way that people deal with this is putting a swarm of auditors all up in the processors' business. It used to be this way for telecom as well: to know whether comms were secure, you needed to walk the length of the cable and look for taps. Comms encryption has radically changed this. The question is, is there a similar revolution in the making for processing as opposed to comms. I strongly doubt the benefits will outweigh the drawbacks.