Stefan Mileschin

A team of insecurity experts has worked out that that it is possible to hack a smartphone by listening into the way a user’s fingers move across the keypad.

If you listen carefully to a phone, usually with specialist gear, you can hear the way your fingers move across a phone’s touchscreen. This is because the wifi signals transmitted by a mobile phone change when the touchscreen is activated, causing interruptions that an attacker can intercept, analyse, and reverse engineer to accurately guess what the user has typed on his phone or in password input fields.

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