Paper 2004/250

Identity Based Threshold Proxy Signature

Jing Xu, Zhenfeng Zhang, and Dengguo Feng

Abstract

Identity-based (ID-based) public key cryptosystem can be a good alternative for certificate-based public key setting, especially when efficient key management and moderate security are required. In a $(t,n)$ threshold proxy signature scheme, the original signer delegates the power of signing messages to a designated proxy group of $n$ members. Any $t$ or more proxy signers of the group can cooperatively issue a proxy signature on behalf of the original signer, but $t-1$ or less proxy signers cannot. In this paper, we present an ID-based threshold proxy signature scheme using bilinear pairings. We show the scheme satisfies all security requirements in the random oracle model. To the best of authors' knowledge, our scheme is the first ID-based threshold proxy signature scheme.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
ID-based signaturesthreshold proxy signaturesbilinear pairings.
Contact author(s)
xujing @ is iscas ac cn
History
2004-09-27: received
Short URL
https://ia.cr/2004/250
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2004/250,
      author = {Jing Xu and Zhenfeng Zhang and Dengguo Feng},
      title = {Identity Based Threshold Proxy Signature},
      howpublished = {Cryptology ePrint Archive, Paper 2004/250},
      year = {2004},
      note = {\url{https://eprint.iacr.org/2004/250}},
      url = {https://eprint.iacr.org/2004/250}
}
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