22 May '16, 2pm

Identify Your Devices by Their Unintentional Radiation

Identify Your Devices by Their Unintentional Radiation

RFID was supposed to revolutionize asset tracking, replacing the barcode everywhere. Or at least that was the prediction once tags got under five cents apiece. They still cost seven to fifteen cents, even in bulk, and the barcode is still sitting pretty. [Chouchang (Jack) Yang] and [Alanson Sample] of Disney Research hope to change that. Instead of tagging every electronic device, they use whatever electromagnetic emissions the device currently produces when it’s powered up. What’s surprising is not that they can tell an iPhone from a toy lightsaber, but that they can tell the toy lightsabers apart . But apparently there’s enough manufacturing and tolerance differences from piece to piece that they appear unique most of the time. The paper (PDF) goes through the details and procedure. The coolest bit? The sensor they use is an RTL-SDR unit with the radio-mixer front end re...

Full article: http://hackaday.com/2016/05/22/identify-your-devices-by-t...

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