Covert and Secret Key Expansion Over Quantum Channels Under Collective Attacks
Covert and Secret Key Expansion Over Quantum Channels Under Collective Attacks
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DOI：
10.1109/tit.2020.3021595
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发表时间：
2020-09
影响因子：
2.5
通讯作者：
Mehrdad Tahmasbi;M. Bloch
中科院分区：
文献类型：
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作者：
Mehrdad Tahmasbi;M. Bloch
我们考虑了量子密钥分发协议的增强安全措施，其中我们要求对手不仅无法获得有关密钥的信息，而且还不知道密钥生成协议已被执行。当攻击者将相同的量子信道独立应用于每个传输的量子态时，类似于量子密钥分发文献中的集体攻击，我们提出了一种在温和限制下实现隐蔽和秘密密钥扩展的协议。该协议的一个关键组成部分是隐蔽估计阶段，然后在隐蔽状态下将其与通用信道编码相结合以获得可靠性和可解析性。
We consider an enhanced measure of security for a quantum key distribution protocol, in which we require that the adversary not only obtains no information about the key but also remains unaware that a key generation protocol has been executed. When the adversary applies the same quantum channel independently to each transmitted quantum state, akin to a collective attack in the quantum key distribution literature, we propose a protocol that achieves covert and secret key expansion under mild restrictions. A crucial component of the protocol is a covert estimation stage, which is then combined with universal channel coding for reliability and resolvability in the covert regime.