Smartphones as Practical and Secure Location Verification Tokens for Payments

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Presented at NDSS 2014 by

Srdjan Capkun

Kari Kostiainen

Claudio Marforio

Nikolaos Karapanos

Claudio Soriente

Trustworthy location statements from a smartphone trusted execution environment (TEE) enable secure second-factor authentication for point-of-sale payments. We provide two user device enrollment solutions that are resistant against powerful but realistic adversaries. A city-wide field study shows the applicability of the proposed second-factor authentication mechanism.