2,215 karma · joined November 22, 2011
It claims the dust is likely charged by solar radiation, but doesn't say the polarity. The paper mostly talks about using "dielectrophoretic forces"–forces experienced by any dielectric (polarizable) particle in a non-uniform electric field regardless of its net charge.
The oracles could be financially incentivized to behave properly. E.g. they post a bond, which is confiscated if they don't post a private key on time or if a whistleblower discovers and reports a key early. In return for correct behavior they can earn some fees paid by users of the service.
The financial incentive still flips if the secret's value is sufficiently large, but it would require coordination of many unprincipled oracles.
It's essentially the same thing that would be happening if you had a grid burning natural gas for electricity powering an electric heat pump, only it all happens locally and the exhaust heat is utilized. It's also similar to a "micro combined heat and power" system, with the power going directly into a heat pump.
EDIT: just discovered there's a smarter/simpler way to make a gas-powered heat pump: https://www.energy.gov/energysaver/absorption-heat-pumps.
https://ring.com/support/articles/7e3lk/Understanding-Video-...
They've been selling consistently to others annoyed by the problem or who want to ground their MacBook for other reasons.