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In Asiacrypt2001, Boneh, Lynn, and Shacham [8] proposed a short signature scheme (BLS scheme) using bilinear pairing on certain elliptic and hyperelliptic curves. Subsequently numerous cryptographic schemes based on BLS signature scheme were proposed. BLS short signature needs a special hash function [6,1,8]. This hash function is probabilistic and generally inefficient. In this paper, we propose...
The concept of concurrent signatures was introduced by Chen, Kudla and Paterson at Eurocrypt 2004. In a concurrent signature scheme, users sign their messages in an ambiguous way so that the signatures are only verifiable by the users themselves but not by any other outsiders. At a later stage, one of the users releases an extra bit of information called the keystone, then all the signatures become...
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