Multiparty quantum signature schemes
Multiparty quantum signature schemes
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DOI：
10.26421/qic16.5-6-3
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发表时间：
2015-05
期刊：
影响因子：
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通讯作者：
J. M. Arrazola;P. Wallden;E. Andersson
中科院分区：
文献类型：
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作者：
J. M. Arrazola;P. Wallden;E. Andersson
数字签名广泛用于电子通信中，以保护金融交易、软件更新和法律合同等重要任务的安全。目前使用的签名方案基于公钥密码学，其安全性来自于计算假设。然而，可以构造无条件安全的签名协议。特别是，使用量子通信，可以基于量子力学的基本原理来构造具有安全性的签名方案。目前已经提出了几种量子签名协议，但都没有明确地推广到三个以上的参与者，它们的安全目标也没有被正式定义。在这里，我们首先扩展了Swanson和Stinson(2011)的安全定义，使其也适用于量子情况，并引入了基于不同验证级别的可转移性的形式定义。然后，我们证明了具有信息论安全性的多方签名协议--量子的或经典的--为了实现其安全目标而必须满足的几个性质。在我们介绍的安全框架中，我们还给出了两个已有的三方量子签名协议。最后，我们将Wallden-Dunjko-Kent-Andersson(2015)给出的量子签名协议推广到多方情形，证明了其抗伪造、抗抵赖性和不可转移性。值得注意的是，该协议可以使用任何点对点量子密钥分发网络来实现，因此准备好进行实验演示。
Digital signatures are widely used in electronic communications to secure important tasks such as financial transactions, software updates, and legal contracts. The signature schemes that are in use today are based on public-key cryptography and derive their security from computational assumptions. However, it is possible to construct unconditionally secure signature protocols. In particular, using quantum communication, it is possible to construct signature schemes with security based on fundamental principles of quantum mechanics. Several quantum signature protocols have been proposed, but none of them has been explicitly generalized to more than three participants, and their security goals have not been formally defined. Here, we first extend the security definitions of Swanson and Stinson (2011) so that they can apply also to the quantum case, and introduce a formal definition of transferability based on different verification levels. We then prove several properties that multiparty signature protocols with information-theoretic security -- quantum or classical -- must satisfy in order to achieve their security goals. We also express two existing quantum signature protocols with three parties in the security framework we have introduced. Finally, we generalize a quantum signature protocol given in Wallden-Dunjko-Kent-Andersson (2015) to the multiparty case, proving its security against forging, repudiation and non-transferability. Notably, this protocol can be implemented using any point-to-point quantum key distribution network and therefore is ready to be experimentally demonstrated.