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Universal Forgery of the Identity-Based Sequential Aggregate Signature Scheme

机译:基于身份的顺序聚合签名方案的通用伪造

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摘要

At CCS'07, a novel identity-based sequential aggregate signature scheme was proposed and the security of the scheme was proven under the hardness assumption of a new computational problem called modified LRSW problem. In the paper, unfortunately, we show that the scheme is universally forgeable, i.e., anyone can generate forged signatures on any messages of its choice. In addition, we show that the computational assumption is not correct by concretely presenting a constant-time algorithm solving the problem. The contribution of the new scheme and assumption is a natural step in cryptologic research that calls for further investigation, which is a step we perform in the current work.
机译:在CCS'07上,提出了一种新颖的基于身份的顺序聚合签名方案,并在称为改进LRSW问题的新计算问题的严格假设下证明了该方案的安全性。不幸的是,在本文中,我们证明了该方案是通用可伪造的,即任何人都可以在其选择的任何消息上生成伪造的签名。另外,通过具体提出解决问题的恒定时间算法,我们证明了计算假设是不正确的。新方案和假设的贡献是密码学研究中的自然步骤,需要进一步的研究,这是我们在当前工作中执行的步骤。

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