Designated Verifier Threshold Proxy Signature Scheme without Random Oracles

Mohammad Beheshti-Atashgah; Majid Bayat; Mahmoud Gardeshi; Mohammad Reza Aref

Paper 2012/488

Designated Verifier Threshold Proxy Signature Scheme without Random Oracles

Mohammad Beheshti-Atashgah, Majid Bayat, Mahmoud Gardeshi, and Mohammad Reza Aref

Abstract

In a $(t,n)$ designated verifier threshold proxy signature \, scheme, an original signer can delegate his/her signing power to $n$ proxy signers such that any $t$ or more out of $n$ proxy signers can sign messages on behalf of the original signer but $t-1$ or less of the proxy signers cannot generate a valid proxy signature. Of course, the signature is issued for a designated receiver and therefore only the designated receiver can validate the proxy signature. In this paper, we propose a new designated verifier threshold proxy signature scheme and also show that the proposed scheme has provable security in the standard model. The security of proposed scheme is based on the $GBDH$ assumption and the proposed scheme satisfies all the security requirements of threshold proxy signature schemes.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Keywords: Proxy signature scheme Threshold proxy signature scheme Provable security Standard model Bilinear pairing.
Contact author(s): M Beheshti A @ gmail com
History: 2012-08-22: received
Short URL: https://ia.cr/2012/488
License: CC BY

BibTeX

@misc{cryptoeprint:2012/488,
      author = {Mohammad Beheshti-Atashgah and Majid Bayat and Mahmoud Gardeshi and Mohammad Reza Aref},
      title = {Designated Verifier Threshold Proxy Signature Scheme without Random Oracles},
      howpublished = {Cryptology {ePrint} Archive, Paper 2012/488},
      year = {2012},
      url = {https://eprint.iacr.org/2012/488}
}