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Published in:
2006 | OriginalPaper | Chapter
Simplified Threshold RSA with Adaptive and Proactive Security
Authors : Jesús F. Almansa, Ivan Damgård, Jesper Buus Nielsen
Published in: Advances in Cryptology - EUROCRYPT 2006
Publisher: Springer Berlin Heidelberg
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We present the currently simplest, most efficient, optimally resilient, adaptively secure, and proactive threshold RSA scheme. A main technical contribution is a new rewinding strategy for analysing threshold signature schemes. This new rewinding strategy allows to prove adaptive security of a proactive threshold signature scheme which was previously assumed to be only statically secure. As a separate contribution we prove that our protocol is secure in the UC framework.