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- W2964137781 abstract "In this paper, we study how to construct tightly secure signature scheme against adaptive chosen message attacks in the multi-user setting (i.e., tightly euf-m-cma secure signature) from the learning with errors (LWE) assumptions. More precisely, we propose a modular framework of euf-m-cma secure signature from a weak partial one-time signature (POS) scheme that is secure only against random message attacks in the multi-user setting (i.e., euf-m-rma secure) and possesses imperfect correctness. By instantiating the weak POS with the LWE assumption, we obtain the first LWE-based tightly euf-m-cma secure signature scheme in the multi-user setting. Moreover, we also present an instantiation of the weak POS based on the Subset Sum (SS) assumption, and again we obtain the first almost tightly euf-cma secure signature scheme from the SS assumption in the single-user setting. All our security reductions are tight and without random oracles." @default.
- W2964137781 created "2019-07-30" @default.
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- W2964137781 date "2019-11-01" @default.
- W2964137781 modified "2023-09-25" @default.
- W2964137781 title "Tightly secure signature schemes from the LWE and subset sum assumptions" @default.
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- W2964137781 doi "https://doi.org/10.1016/j.tcs.2019.07.015" @default.
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