Paper 2015/1051

Cryptanalysis and Improvement of Identity-based Proxy Multi-signature scheme

Jayaprakash Kar

Abstract

Cao-Cao’s recently proposed an identity-based proxy signature scheme and claim that the scheme is provably secure in random oracle model. In this paper we have reviewed the scheme and proven that the scheme is vulnerable to chosen message attack under the defined security model. To prevent this attack, we propose an improved version of the scheme. A Proxy multi-signature scheme allows an authorized proxy signer to sign on a message on behalf of a group of original signers.

Metadata
Available format(s)
PDF
Category
Cryptographic protocols
Publication info
Preprint.
Contact author(s)
jayaprakashkar @ yahoo com
History
2015-10-30: received
Short URL
https://ia.cr/2015/1051
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2015/1051,
      author = {Jayaprakash Kar},
      title = {Cryptanalysis and Improvement of Identity-based Proxy Multi-signature scheme},
      howpublished = {Cryptology ePrint Archive, Paper 2015/1051},
      year = {2015},
      note = {\url{https://eprint.iacr.org/2015/1051}},
      url = {https://eprint.iacr.org/2015/1051}
}
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