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How much/what hardware does the rowhammer DRAM bug affects?
From: Juan <[email protected]>
On Fri, 18 Sep 2015 16:24:20 +0300
Georgi Guninski <[email protected]> wrote:
>> Once upon a time, at an open source party some people claimed that
>> from commodity microwave oven one can made device that (don't
>> remember which of those) damages electronics and/or severely
>> interfere with GSM communications at nontrivial distance.
> Â Â shouldn't an unshielded microwave oven jam a whole city as well
> Â Â as burn anybody who gets close to it?
>Â Â looks like a great 'terrist' project.
Within the last couple of months, I think somebody was arrested for planning some sort of "X-ray death ray". http://nypost.com/2015/08/18/kkk-member-built-death-ray-machine-to-kill-muslims-and-obama-prosecutors-say/Â ; Â Â But only a dweeb doesn't know that X-rays cannot be focussed. Â (With one very obscure exception not applicable here. Â Find it and get an "attaboy!". )
Microwaves, OTOH, can be focussed rather easily. Â The frequency is 2.45 Ghz, at about 1 Kilowatt. Â (wavelength about 12 centimeters.) Â I'd have to consult a Radio Amateur's handbook, but a modern dish (intended or Directv or Dish network) could probably get 15-20 db of gain, compared with isotropic. Â An old-style 8-foot dish probably would do 30 db gain. Â That would be 100 kilowatts ERP.
Such an unshielded  (open) device would probably impair WiFi at 2.5 Ghz severely, if you're close to it, say a few hundred feet away.  Fortunately, I think microwave ovens have better than 60 db of shielding.  A few 10s of feet, away, hardware damage might occur if that full 1 kw were allowed to leak out.      Jim Bell
> Don't remember the electricity requirements.   ordinary requirements of an ordinary oven?
Ordinary microwave ovens are probably 75%-80% efficient. Â Thus, if you need to supply a 1 kilowatt microwave, you'll probably need 1250 watts of AC power.
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