A short identity-based proxy ring signature scheme from RSA |
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| Affiliation: | 1. Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran;2. Electronics Research Institute (Center), Sharif University of Technology, Tehran, Iran;3. Centre for Computer and Information Security Research, University of Wollongong, Australia;1. Department of Electrical Engineering, Yadegar -e- Imam Khomeini (rah), shahr-e-rey Branch, Islamic Azad University, Tehran, Iran;2. Department of Electrical and Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran |
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| Abstract: | Identity-based proxy ring signature concept was introduced by Cheng et al. in 2004. This primitive is useful where the privacy of proxy signers is required. In this paper, the first short provably secure identity-based proxy ring signature scheme from RSA assumption has been proposed. In addition, the security of the proposed scheme tightly reduces to the RSA assumption, and therefore, the proposed scheme has a proper advantage in security reduction compared to the ones from RSA. The proposed scheme not only outperforms the existing schemes in terms of efficiency and practicality, but also does not suffer from the proxy key exposure attack due to the use of the sequential aggregation paradigm. |
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