Locking Thieves Out of Your Smartphone
February 7, 2017
Ben-Gurion University of the Negev (BGU) researchers have developed a technique that identifies a smartphone thief or intruder in under 14 seconds.
“While most people are confident that password protecting a phone is sufficient, they tend to choose familiar passwords that are easy to guess,” says BGU researcher Liron Ben Kimon. “With our approach, even if someone has the password, they can’t replicate a smartphone user’s unique behavior.”
Liron Ben Kimon recently completed her M.Sc. in data mining and business intelligence in the BGU Department of Software and Information Systems Engineering supervised by Prof. Bracha Shapira, Prof. Lior Rokach and Yisroel Mirsky. She is now a data scientist at PayPal in Beer-Sheva’s Advanced Technologies Park adjacent to the University.
“What is new about this verification method is that the model evaluates the touch pattern sequence,” Ben Kimon says. “For example, smartphone users interact with their device while using Google differently than they might type a message, and we can detect that.”
Her verification model extracts information from a phone’s sensors to identify speed and frequency of touch combined with the application being used. The program also computes 30 seconds of recent history, such as which screens a user touched, which buttons were pressed and how much electricity he/she used.
The researchers culled information from 20 users over a two-week period to develop their model, which shows that unauthorized users can be identified in under 14 seconds with less than 35 screen actions. On average, a user touches the screen 35 times in 13.8 seconds.
“A thief will almost certainly touch the screen more than 35 times to steal information because he is not familiar with an owner’s phone settings and apps,” Ben Kimon says. “The phone can learn the typical touch and sequence pattern, and lock out an unauthorized user to prevent data theft, or someone you don’t want peeking at your messages.”
Three million phones were stolen in the United States, and another three million were lost in 2013, according to Consumer Reports.
About American Associates, Ben-Gurion University of the Negev
American Associates, Ben-Gurion University of the Negev (AABGU) plays a vital role in sustaining David Ben-Gurion’s vision: creating a world-class institution of education and research in the Israeli desert, nurturing the Negev community and sharing the University’s expertise locally and around the globe. As Ben-Gurion University of the Negev (BGU) celebrates its 50th birthday this year, AABGU imagines a future that goes beyond the walls of academia. It is a future where BGU invents a new world and inspires a vision for a stronger Israel and its next generation of leaders. Together with supporters, AABGU will help the University foster excellence in teaching, research and outreach to the communities of the Negev for the next 50 years and beyond.
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