Two-Round Concurrent Blind Signatures without Random Oracles

@inproceedings{Kiayias2005TwoRoundCB,
  title={Two-Round Concurrent Blind Signatures without Random Oracles},
  author={Aggelos Kiayias and Hong-Sheng Zhou},
  year={2005}
}
We present the first blind signature scheme that is efficient and provably secure without random oracles under concurrent attacks utilizing only two rounds of short communication. The scheme is based on elliptic curve groups for which a bilinear map exists and on extractable and equivocable commitments. The unforgeability of the employed signature scheme is guarranteed by the LRSW assumption while the blindness property of our scheme is guarranteed by the Decisional Linear Diffie Hellman… CONTINUE READING
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