Is your smartphone listening to you?

Re:Is your smartphone listening to you? by nickpsecurity on Monday June 06, 2016 @11:02AM (#11847254)

What frequencies can an EMF meter pick up? One of my own designs of the past was to hide something in a cable to amplify a signal along 10GHz optionally with a beam hitting it. None of the WiFi security monitors looked for 10GHz. Neither did most cheap, spectrum kits.

The dedicated chips in phones with the radios could have extra functionality for other spectrum activated by a trigger, possibly received wireless signal. So, it's a concern to me.

[ Parent | on HN ]

Re:Is your smartphone listening to you? by Exras on Monday June 06, 2016 @03:28PM (#11849577)

The one I suggest goes to 6 Ghz

I can't imagine that pulsed digital transmission on 10Ghz would not create noise in the lower harmonics bands at all. The meter also have a sound mode where you eg. can hear the ~8-10Khz modulation of the mobile ~700/900/1900/2100Mhz signal.

You can clearly hear the difference between different transmission types as DECT phones, Wifi, GSM/LTE, and EM noise in general(PC's/HDMI cables/USB3 HD docks)

My central room heater has a small CR battry powered computer (that I had forgot all about) that calculate the bill and transmit the results every 2 minutes on 2.4Ghz

it makes a tiny ~0.5 sec pulse on the display/audio, and I thought for an hour that I had a hidden transmitter in my apartment, since turning the mains fuse off had no effect.

I had to clear the room of all tech to track down the source, felt a bit stupid when I finally found it.

So going down this road has some up's and down's vs staying totally oblivious of ones electromagnetic environment.

[ Parent | on HN ]

Re:Is your smartphone listening to you? by nickpsecurity on Monday June 06, 2016 @03:35PM (#11849639)

Appreciate the extra info. Might look into getting one. Lmao on the mystery of spying heater.

[ Parent | on HN ]