Android Lock Screen Pattern Can Be Hacked With Phone’s Speaker & Microphone

[Sept 05, 2018]

Researchers from the universities in Sweden and the UK have stumbled on a new technique using which your smartphone’s speaker and microphone can be used for stealing unlock pattern.

The technique works by forming a sonar system by using sound waves to track the position of your fingers on your phone’s screen. The new technique has been dubbed as SonarSnoop.

To use this hack, a malicious app needs to be running on the phone for emitting sound waves from the speaker, and the bounced off waves from the user’s fingers are captured by the microphone to identify the pattern. Interestingly, the sound waves emitted by the app are in the range of 18kHz and 20kHz, which is inaudible by human ears.

With the help of SonarSnoop, the researchers were able to cut down the number of possible unlock patterns by 70%.

Hacking a smartphone’s lock through Sonar is a fairly new concept.

Cyber Security Tips: 

  • Disable the installation of apps from unknown sources in your phone’s settings.
  • Only install apps from Google Play.
  • Do Not Root Your Device.
  • Update Your Device When Prompted.
  • Back Up Your Personal Data Regularly.

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