Cryptology ePrint Archive: Report 2011/359
High-Entropy Visual Identiﬁcation for Touch Screen Devices
Nathaniel Wesley Filardo and 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 userís act of identifying to the device. Our system uses visual cryptography , 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  but tailored for constrained, touch-screen displays.
Category / Keywords: applications / visual cryptography, user identification
Publication Info: The 8th International Conference on Information Security Practice and Experience (ISPEC 2012). LNCS 7232 Springer-Verlag, 2012.
Date: received 4 Jul 2011, last revised 15 Jun 2012
Contact author: nwf at cs jhu edu
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Version: 20120615:155156 (All versions of this report)
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