量子密钥分配
计算机科学
量子密码学
钥匙(锁)
认证(法律)
计算机网络
计算机安全
量子
量子信息
物理
量子力学
作者
Evgeniy O. Kiktenko,Aleksei Malyshev,Maxim A. Gavreev,Anton A. Bozhedarov,N. O. Pozhar,M. N. Anufriev,Aleksey K. Fedorov
标识
DOI:10.1109/tit.2020.2989459
摘要
Quantum key distribution (QKD) enables unconditionally secure communication between distinct parties using a quantum channel and an authentic public channel. Reducing the portion of quantum-generated secret keys, that is consumed during the authentication procedure, is of significant importance for improving the performance of QKD systems. In the present work, we develop a lightweight authentication protocol for QKD based on a `ping-pong' scheme of authenticity check for QKD. An important feature of this scheme is that the only one authentication tag is generated and transmitted during each of the QKD post-processing rounds. For the tag generation purpose, we design an unconditionally secure procedure based on the concept of key recycling. The procedure is based on the combination of almost universal 2 polynomial hashing, XOR universal 2 Toeplitz hashing, and one-time pad (OTP) encryption. We demonstrate how to minimize both the length of the recycled key and the size of the authentication key, that is required for OTP encryption. As a result, in real case scenarios, the portion of quantum-generated secret keys that is consumed for the authentication purposes is below 1%. Finally, we provide a security analysis of the full quantum key growing process in the framework of universally composable security.
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