According to CNET, a system devised by computer scientists at Newcastle University in the U.K. uses human-scribbled doodles in lieu of traditional passwords. The Background Draw-a-Secret (BDAS) system, developed by Jeff Yan, a computer science lecturer at the School of Computing Science at Newcastle University, and graduate student Paul Dunphy, lets people choose from a selection of base images. The image is then visually overlaid with a grid and people "trace" the image on a touch screen to the best of their ability. Their unique drawing skill for that image, or lack thereof, becomes the passcode…

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