So this communications channels runs at .001 bits per second? As in it could transmit a 2048-bit private key (with no metadata) in about 19 days?
The time it took them to increase the heat and transmit a â1â varied
between three and 20 minutes depending. The time to restore the system
to normal temperature and transmit a â0â usually took longer.
As a âprototypeâ, it can be done. Advances in the technology will certainly speed things up. Mooreâs Law holds that a computer will be able to provide fiber equivalent speeds in a couple of months. Zoom!
Slow, but if you logged user login IDs and passwords, you wouldnât need much data to prepare for a compatriot on premises to gain access.
Hooray! Weâre now applying Mooreâs law to thermal-dynamics!
Seems like some sort of Peltier cooling would speed up this process.
Infrared communication? Where have I heard of this before.
Isnât it about a week early for this?
Itâs in the Palm⢠of your hand.
Changing temperature would involve varying the fan speed. Wouldnât it be more efficient to just use the sound or vibration of the fan. If the other computer has a mic, it would be trivial to detect the noise.
Imagine having a rack of computers, you could theoretically transmit a signal to all of the server simultaneously. If you are listening for a very specific signal on a very specific frequency, you can filter out all the noise.
You wouldnât even need to use a computer to be the transmitter. You could have a tampered cell phone use a special ringtone to activate the infected computers. Or the phone system, or intercom. You would think that it was just glitching out, but it would really have the instructions embedded.
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