Preventing snooping via power lines

alshain.fi

1 pointmgronhol2 comments

> Problem: Computers are vulnerable to eavesdropping via power lines

How much of a problem is this? Is this a merely theoretical possibility, is it actively being exploited? What are the information leakage risks as compared to e.g. internet advertising, NSA surveillance, malware?

> In order to prevent this kind of eavesdropping we have designed a USB device that dissipates energy with a carefully crafted spectrum...

How much electricity does this use?

Yes, it is actually a quite problem because this is something you cannot counter with encryption or other similar means.

http://en.wikipedia.org/wiki/TEMPEST

The power usage is on average 100mA.

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