Instruments in smartphones such as the accelerometer, gyroscope and proximity sensors represent a potential security vulnerability as researchers, including one of Indian-origin, have found that data from these sensors could be used by hackers to guess the security PIN and unlock it. Using a combination of information gathered from six different sensors found in smartphones and machine learning and deep learning algorithms, the researchers succeeded in unlocking Android smart phones with a 99.5 per cent accuracy within only three tries, said the study.

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