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Title:
High-Entropy Visual Identification for Touch Screen Devices
Authors: Nathaniel Wesley Filardo, Giuseppe Ateniese
Abstract:We exhibit a system for improving the quality of user-derived keying material on touch-screen devices. We allow a device to recover previously generated, highly entropic data suitable for use as (part of) a strong secret key from a user’s act of identifying to the device. Our system uses visual cryptography [22], using no additional electronics and no memorization on the part of the user. Instead, we require the use of a transparency overlaid on the touch-screen. Our scheme is similar to the identification scheme of [23] but tailored for constrained, touch-screen displays.
ePrint: https://eprint.iacr.org/2011/359
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