[Cryptography] Gaslighting ~= power droop == side channel attack

[Natanael]

Den 29 nov 2016 19:45 skrev "Chris Tonkinson" <chris at tonkinson.com>:
> I wonder if some Simple™ device could be created based on a combination
> of battery, capacitor, and timer to smooth the "curves" of consumption
> for a household (or on a smaller scale for specific appliances),
> rendering this type of analysis ineffectual.

Try asking Tesla.

https://www.tesla.com/powerwall?redirect=no

> Your path off grid
> Combine solar and one or more Powerwalls to power your home independently
from the utility grid.

14 kWh a piece (5kW max continuous load). Given that they support solar
panel connections, they must be able to rapidly switch between charging and
discharging. You can run on solar power until the cloud comes out, switch
to battery, run on solar again, then on battery when the night comes, then
on grid power when you've got neither solar or battery power. Also works as
battery backup when the grid goes offline.

It shouldn't require much reprogramming to make it smooth out your power
draw from the grid to nearly constant (they almost definitely already are
capable of selective charging and discharging different groups of cells
simultaneously). But perhaps they don't have the capacitors required to not
wear out the batteries too fast, if a full household is supposed to use it
for years.

Most of the cost goes into to the batteries themselves. If you think
they're expensive now, then the cost for the same kWh would have given you
a heart attack 10 years ago.

This however doesn't solve your issues with RF leakage (Faraday's cage
wallpapers is a thing) or other side channels like noise (much harder to
solve) and heat.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.metzdowd.com/pipermail/cryptography/attachments/20161129/138ede0c/attachment.html>