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2005 IEEE Symposium on Security and Privacy (S&P'05)   pp. 110-124
Seeing-Is-Believing: Using Camera Phones for Human-Verifiable Authentication
Jonathan M. McCune, Carnegie Mellon University
Adrian Perrig, Carnegie Mellon University
Michael K. Reiter, Carnegie Mellon University

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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/SP.2005.19
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Abstract
Current mechanisms for authenticating communication between devices that share no prior context are inconvenient for ordinary users, without the assistance of a trusted authority. We present and analyze Seeing-Is-Believing, a system that utilizes 2D barcodes and camera-phones to implement a visual channel for authentication and demonstrative identification of devices. We apply this visual channel to several problems in computer security, including authenticated key exchange between devices that share no prior context, establishment of a trusted path for configuration of a TCG-compliant computing platform, and secure device configuration in the context of a smart home.
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Citation:  Jonathan M. McCune, Adrian Perrig, Michael K. Reiter, "Seeing-Is-Believing: Using Camera Phones for Human-Verifiable Authentication," sp, pp. 110-124,  2005 IEEE Symposium on Security and Privacy (S&P'05),  2005