Secure quantum signatures using insecure quantum channels
Secure quantum signatures using insecure quantum channels
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DOI：
10.1103/physreva.93.032325
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发表时间：
2016-03-17
影响因子：
2.9
通讯作者：
Andersson, Erika
中科院分区：
文献类型：
--
作者：
Amiri, Ryan;Wallden, Petros;Andersson, Erika
数字签名广泛应用于现代通信中，以保证消息的真实性和可传输性。目前使用的经典方案的安全性依赖于计算假设。提出了一种不需要可信量子信道的量子签名方案。我们证明了它对最一般的相干攻击是无条件安全的，并表明它需要传输的量子态比以前的计划显着减少。我们还表明，我们的方案的量子信道噪声阈值是不严格的比提取一个安全的密钥使用量子密钥分发。这表明，“直接”量子签名方案可以优于依赖于使用量子密钥分发生成的秘密共享密钥的签名方案。
Digital signatures are widely used in modern communication to guarantee authenticity and transferability of messages. The security of currently used classical schemes relies on computational assumptions. We present a quantum signature scheme that does not require trusted quantum channels. We prove that it is unconditionally secure against the most general coherent attacks, and show that it requires the transmission of significantly fewer quantum states than previous schemes. We also show that the quantum channel noise threshold for our scheme is less strict than for distilling a secure key using quantum key distribution. This shows that "direct" quantum signature schemes can be preferable to signature schemes relying on secret shared keys generated using quantum key distribution.