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Cryptanalysis of a multiparty quantum key agreement protocol based on commutative encryption

机译:基于换向加密的多派量子密钥协议协议的密码分析

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摘要

Recently, Sun et al. (Quantum Inf Process 15(5): 2101-2111, 2016) proposed an efficient multiparty quantum key agreement protocol based on commutative encryption. The aim of this protocol is to negotiate a secret shared key among multiple parties with high qubit efficiency as well as security against inside and outside attackers. The shared key is the exclusive-OR of all participants' secret keys. This is achieved by applying the rotation operation on encrypted photons. For retrieving the final secret key, only measurement on single states is needed. Sun et al. claimed that assuming no mutual trust between participants, the scheme is secure against participant's attack. In this paper, we show that this is not true. In particular, we demonstrate how a malicious participant in Sun et al.' s protocol can introduce "a" final fake key to target parties of his choice. We further propose an improvement to guard against this attack.
机译:最近,Sun等人。 (量子INF Process 15(5):2101-2111,2016)提出了一种基于换向加密的高效的多方量子密钥协议协议。 本协议的目的是在具有高Qubit效率的多方和内部和外部攻击者的安全性之间协商秘密共享密钥。 共享密钥是所有参与者的秘密密钥。 这是通过在加密光子上应用旋转操作来实现的。 为了检索最终的秘密密钥,只需要单一状态的测量。 太阳等。 声称,假设与会者之间没有相互信任,该计划是防止参与者的攻击。 在本文中,我们表明这不是真的。 特别是,我们展示了Sun等人的恶意参与者。 S协议可以向目标各方引入“一个”最终的虚假关键。 我们进一步提出改善防范这种攻击。

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