There are all kinds of exposed wires on a computer system that extend beyond the case. Even shielded, you could still get RF/EM off of something. To protect a

There are all kinds of exposed wires on a computer system that extend beyond the case. Even shielded, you could still get RF/EM off of something. To protect a system from this kind of an attack vector requires deliberate design choices and testing. You're not going to get it "by accident"