Identity Based Threshold Proxy Signature

Jing Xu; Zhenfeng Zhang; Dengguo Feng

Paper 2004/250 Original: eprint.iacr.org/2004/250 ↗

Identity Based Threshold Proxy Signature

Jing Xu

Zhenfeng Zhang

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: Preprint.
History: 2004-09-27: last updated; 2004-09-27: published
Short URL: https://ia.cr/2004/250
License: https://creativecommons.org/licenses/by/4.0/

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},
      url = {https://eprint.iacr.org/2004/250}
}