C. Culnane, Ioana Boureanu, Jean Snyman, S. Wesemeyer, H. Treharne
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Formalising Application-Driven Authentication & Access-Control based on Users’ Companion Devices
We define and formalise a generic cryptographic construction that underpins coupling of companion devices, e.g., biometrics-enabled devices, with main devices (e.g., PCs), in a user-aware manner, mainly for on-demand authentication and secure storage for applications running on the main device. We define the security requirements of such constructions, provide a full instantiation in a protocol-suite and prove its computational as well as Dolev-Yao security. Finally, we implement our protocol suite and one password-manager use-case.
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