Hackers May Soon Be Able to Tell What You’re Typing—Just By Hearing You Type

guest · Jun 5, 2019

Hackers May Soon Be Able to Tell What You’re Typing—Just By Hearing You Type
Research suggests that sound waves from typing on a phone can be intercepted and decoded
June 5, 2019
https://www.wsj.com/articles/hacker...re-typingjust-by-hearing-you-type-11559700120

Thanks to the increasing sophistication of smartphone technology, hackers soon may be able to intercept and analyze the sounds of typing—and figure out exactly what people are writing on their devices.

A growing body of academic research suggests that acoustic signals, or sound waves, produced when we type on our phones could be used by hackers to glean text messages, passwords, PINs and other private information. Such attacks could occur, experts say, if smartphone users were to download an app infected with malware that... [...Paywall...]
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A scary new hack created by researchers can accurately guess your password by listening to the sound of your fingers tapping the phone screen
June 5, 2019
https://www.businessinsider.de/smartphone-passcodes-could-be-compromised-through-microphones-2019-6

"We showed that the attack can successfully recover PIN codes, individual letters and whole words," researchers Ilia Shumailov, Laurent Simon, Jeff Yan, and Ross Anderson said in the paper, which was first reported by the Wall Street Journal on Wednesday.
The technique relies on sound waves and microphones
When people tap on the screens of their smartphones and tablets, they generate sound waves. Most contemporary handheld devices have multiple microphones that they use for voice calls, recording voice memos, and more.
The researchers used the devices' microphones to detect the soundwaves generated by passcode taps.

The system they created was able to correctly guess a four-digit passcode 73% of the time after 10 tries in one test. In another test, it was able to identify 30% of passwords ranging from seven to 13 characters in length after 20 tries.
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Paper: Hearing your touch: A new acoustic side channel on smartphones (PDF - 5.28 MB): https://arxiv.org/pdf/1903.11137

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