[Cryptography] Quantum computers will never overcome noise issues?

[Ray Dillinger]

We could get a few more kicks out of Moore's law, without needing to go
all the way to quantum, if we figure out a way to build chips in a fully
three-dimensional way - with nanoscale assembly as opposed to etching
processes.

If and when we are able to reliably assemble strands of high-temp
superconductors they will enable huge speed advances two ways:  First,
by direct use in circuits as wires that don't generate heat, and second
by use as thermal conductors to move all the heat generated by gates and
everything else away from the middle of the chip.

Honestly though, I think we should be looking at protocols more
seriously.  Everybody's trying to harden public-key crypto against
quantum, and maybe we should be trying instead to harden protocols
against needing public-key crypto.

We've got several Public-key systems that we don't know how to attack
with QC.  But I'm not clear about whether that's because they're
actually impenetrable to QC, or just because we don't know how yet.

				Bear

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