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5 papers · 2 filters
ConXsense - Automated Context Classification for Context-Aware Access Control
Markus Miettinen, Stephan Heuser, Wiebke Kronz +2
We present ConXsense, the first framework for context-aware access control on mobile devices based on context classification. Previous context-aware access control systems often re…
PotLLL: A Polynomial Time Version of LLL With Deep Insertions
Felix Fontein, Michael Schneider, Urs Wagner
Lattice reduction algorithms have numerous applications in number theory, algebra, as well as in cryptanalysis. The most famous algorithm for lattice reduction is the LLL algorithm…
The Fiat-Shamir Transformation in a Quantum World
Özgür Dagdelen, Marc Fischlin Tommaso Gagliardoni
The Fiat-Shamir transformation is a famous technique to turn identification schemes into signature schemes. The derived scheme is provably secure in the random-oracle model against…
SL2 homomorphic hash functions: Worst case to average case reduction and short collision search
Ciaran Mullan, Boaz Tsaban
We study homomorphic hash functions into SL(2,q), the 2x2 matrices with determinant 1 over the field with elements. Modulo a well supported number theoretic hypothesis, which h…
Off-Path Hacking: The Illusion of Challenge-Response Authentication
Yossi Gilad, Amir Herzberg, Haya Shulman
Everyone is concerned about the Internet security, yet most traffic is not cryptographically protected. The usual justification is that most attackers are only off-path and cannot…