Smartphone "fingerprints"

Phys Org.com (Douglas, Isle of Man, April 28) -- Fingerprints are mostly invisible. They can affirm your onetime presence, but they cannot be used to track your day-to-day activities. But what if our hand-held electronics are leaving real-time fingerprints instead? Fingerprints that are so intrinsic to the device that, like our own, they cannot be removed? U. of I. computer science and electrical engineering professor Romit Roy Choudhury and graduate students Sanorita Dey and Nirupam Roy have demonstrated that these fingerprints exist within smartphone sensors, mainly because of imperfections during the hardware manufacturing process. Also: TG Daily (April 28), Quartz (April 28), NDTV (India, April 29), Red Orbit (April 29), FirstPost (April 29), Business Standard (India, April 29), Financial Express (India, April 29), Crazy Engineers (April 29), Jagran Post (India, April 29), The Telegraph (London, April 29), Gizmag (Melbourne, Australia, April 29), Delhi Daily News (New Delhi, April 29), Times of India (April 30), EE Times (San Francisco, April 29), The Huffington Post (April 30), Headlines & Global News (April 30), Think Digit (April 30), The Voice of Russia (April 29).