Smartphone batteries can reveal what you typed and read

guest · Jun 25, 2018

Smartphone batteries can reveal what you typed and read
Power trace sniffing, a badly-designed API and some cloudy AI spell potential trouble
June 25, 2018
https://www.theregister.co.uk/2018/06/25/the_battery_is_the_smartphones_ibesti_snitch_boffins/

A group of researchers has demonstrated that smartphone batteries can offer a side-channel attack vector by revealing what users do with their devices through analysis of power consumption.

Nobody needs to panic yet, because the attack isn't yet more than a decently-tested theory and it would be hard to execute. But there's also a real-world implication because the paper shows how a too-free API can help attackers in ways its designers never imagined.

The paper, by researchers from UT Austin, the Hebrew University, and Technion explained that a “poisoned” battery can gather enough information about power-hungry phone components to reveal user activity.

The authors contend that reading the CPU and screens' power traces (and even those from the GPU or the DRAM in some cases) would reveal information about Websites a user visited, or even what they were typing on the screen: [...]
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