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Your unique breath ‘fingerprint’ could be used to unlock your phone

When we exhale, we reveal distinctive information about the shape of our airways, which could serve as an ID test for unlocking smartphones – and unlike some other biometric ID tests, this one can’t be hacked after we die

By Matthew Sparkes

12 January 2024

Policeman checking woman driver for alcohol intoxication

It may be possible to identify people from the way they breathe

RossHelen editorial/Alamy

The air turbulence created when breathing could be used as an effective biometric test for unlocking smartphones or other devices – one with the morbid advantage that, unlike other tests such as a fingerprint scan, it cannot be passed by a dead person.

Mahesh Panchagnula at the Indian Institute of Technology Madras, Chennai, and his colleagues started experimenting with breathing data recorded by an air velocity sensor out of curiosity. They had hoped that an AI model could interpret…

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