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Lecture Notes in Computer Science
We put forward two new measures of security for threshold schemes secure in the adaptive adversary model: security under concurrent composition; and security without the assumption of reliable erasure. Using novel constructions and analytical tools, in both these settings, we exhibit efficient secure threshold protocols for a variety of cryptographic applications. In particular, based on the recent scheme by Cramer-Shoup, we construct adaptively secure threshold cryptosystems secure againstdoi:10.1007/3-540-45539-6_16 fatcat:jwsmbtqovzasrkj55szd4zr74i