YANG Xiaodong and WANG Caifen. Threshold Proxy Re-signature Schemes in theStandard Model[J]. Chinese Journal of Electronics, 2010, 19(2): 345-350.
Citation: YANG Xiaodong and WANG Caifen. Threshold Proxy Re-signature Schemes in theStandard Model[J]. Chinese Journal of Electronics, 2010, 19(2): 345-350.

Threshold Proxy Re-signature Schemes in theStandard Model

  • Received Date: 1900-01-01
  • Rev Recd Date: 1900-01-01
  • Publish Date: 2010-04-05
  • A (k; n) threshold proxy re-signature
    scheme distributes the re-signature key of the delegatee
    and the delegator. The re-signing ability to n proxies in
    a way that any set of k or more honest proxies can col-
    laborate to re-sign, while any set of k ¡ 1 proxies cannot.
    We propose two threshold proxy re-signature schemes with
    trust dealer, which are both proved secure in the standard
    model. Threshold proxy re-signature schemes are based on
    the Computational Di±e-Hellman (CDH) problem with-
    out random oracles. The schemes satisfy the properties
    of bidirectionality, non-interactivity, multi-use and private
    proxy. Meanwhile, the re-signature share generation and
    veri¯cation algorithms are non-interactive and e±cient.
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