Paper 2004/108

Two Improved Partially Blind Signature Schemes from Bilinear Pairings

Sherman S. M. Chow, Lucas C. K. Hui, S. M. Yiu, and K. P. Chow


A blind signature scheme is a protocol for obtaining a digital signature from a signer, but the signer can neither learn the messages he/she sign nor the signatures the recipients obtain afterwards. Partially blind signature is a variant such that part of the message contains pre-agreed information (agreed by the signer and the signature requester) in unblinded form, while threshold blind signature distributes the signing power to a group of signers such that a signature can only be produced by interacting with a predetermined numbers of signers. In this paper, we propose a threshold partially blind signature scheme from bilinear pairings and an ID-based partially blind signature scheme, which are provably secure in the random oracle model. To the best of authors' knowledge, we give the first discussion on these two notions.

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Available format(s)
Public-key cryptography
Publication info
Published elsewhere. In Colin Boyd and Juan Gonzalez Nieto, editors, Information Security and Privacy: 10th Australasian Conference, ACISP 2005, Brisbane, Australia, July 4-6, 2005. Proceedings. Lecture Notes in Computer Science.
threshold partially blind signatureidentity-based partially blind signaturebilinear pairings
Contact author(s)
smchow @ cs hku hk
2005-04-25: last of 12 revisions
2004-05-07: received
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      author = {Sherman S. M.  Chow and Lucas C. K.  Hui and S. M.  Yiu and K. P.  Chow},
      title = {Two Improved Partially Blind Signature Schemes from Bilinear Pairings},
      howpublished = {Cryptology ePrint Archive, Paper 2004/108},
      year = {2004},
      note = {\url{}},
      url = {}
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