Washington,Now Smart phone leave your fingerprints all over – from computer keyboards or door knobs – but do you know that your smart phone leaves real-time fingerprints that cannot be removed?
Along with graduate students Sanorita Dey and Nirupam Roy, Choudhury found that these fingerprints exist within smart phone sensors.The researchers focused specifically on the accelerometer, a sensor that tracks three-dimensional movements of the phone – essential for countless applications, including pedometers, sleep monitoring, mobile gaming.The researchers tested more than 100 devices over the course of nine months that included 80 standalone accelerometer chips used in popular smart phones, 25 Android phones and two tablets.With 96 percent accuracy, the researchers could discriminate one sensor from another.
“We do not need to know any other information about the phone – no phone number or SIM card number. Just by looking at the data, we can tell you which device it is coming from. It is almost like another identifier,” Dey informed.The research also suggests that other sensors in the phone – gyroscopes, magnetometers, microphones, cameras and so forth – could possess the same types of idiosyncratic differences.
For smartphone users and e-book readers, smartwatch wearers and tablet devotees, perhaps the most critical take-home message is the importance of vigilance, the researchers noted.