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.