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arXiv 2107.12974quant-phcs.CR
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基于量子密钥分发网络的实用量子多方签名

Practical quantum multiparty signatures using quantum-key-distribution networks

E. O. Kiktenko, A. S. Zelenetsky, A. K. Fedorov

摘要:

数字签名被广泛用于提供通信安全。与此同时,目前部署的数字签名协议的安全性是基于未经证实的计算假设。量子密钥分发(QKD)是保证通信无条件(信息论)安全的一种有效方法,其安全性是基于量子力学定律的。在这项工作中,我们开发了一个无条件安全的签名方案,保证在QKD网络中的任意长度的消息的真实性和可传输性。在所提出的设置中,QKD网络由两个子网组成:(i)包括签名者并限制恶意节点数量的内部网络,以及(ii)对恶意节点数量没有假设的外部网络。在外部子网中缺乏信任假设的结果是需要来自内部子网接收者的帮助来验证外部子网接收者的消息签名对。我们提供了一个全面的安全分析所开发的方案,执行的方案参数的优化方面的秘密密钥消费,并证明所开发的方案是兼容的能力,目前可用的QKD设备。

英文摘要:

Digital signatures are widely used for providing security of communications. At the same time, the security of currently deployed digital signature protocols is based on unproven computational assumptions. An efficient way to ensure an unconditional (information-theoretic) security of communication is to use quantum key distribution (QKD), whose security is based on laws of quantum mechanics. In this work, we develop an unconditionally secure signature scheme that guarantees authenticity and transferability of arbitrary length messages in a QKD network. In the proposed setup, the QKD network consists of two subnetworks: (i) an internal network that includes the signer and with limitation on the number of malicious nodes and (ii) an external network that has no assumptions on the number of malicious nodes. A consequence of the absence of the trust assumption in the external subnetwork is the necessity of assistance from internal subnetwork recipients for the verification of message-signature pairs by external subnetwork recipients. We provide a comprehensive security analysis of the developed scheme, perform an optimization of the scheme parameters with respect to the secret key consumption, and demonstrate that the developed scheme is compatible with the capabilities of currently available QKD devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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