Tech Break

Jun 16th 2020

Tech Break 6285

Lamphone: Eavesdrop on a Hanging Lightbulb

Lamphone: Eavesdrop on Lightbulbs
Category: TWiT Bits

"Lamphone" is a novel side-channel attack that can be applied by eavesdroppers to recover sound from a room that contains [an exposed] hanging lightbulb. Lamphone recovers sound optically via an electro-optical sensor which is directed at a hanging bulb; such bulbs vibrate due to air pressure fluctuations which occur naturally when soundwaves hit the hanging bulb’s surface.

Subscribe & watch the full Security Now podcast:

You can find more about TWiT and subscribe to our full shows at