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Information-Theoretic Secure Key Sharing for Wide-Area Mobile Applications | Guyue Li
; Hongyi Luo
; Jiabao Yu
; Aiqun Hu
; Jiangzhou Wang
; | Date: |
4 Jan 2023 | Abstract: | With the rapid growth of handheld devices in the internet of things (IoT)
networks, mobile applications have become ubiquitous in everyday life. As
technology is developed, so do also the risks and threats associated with it,
especially in the forthcoming quantum era. Existing IoT networks, however, lack
a quantum-resistant secret key sharing scheme to meet confidential message
transmission demands in wide-area mobile applications. To address this issue,
this article proposes a new scheme, channel reciprocity (CR) based quantum key
distribution (QKD) CR-QKD, which accomplishes the goal of secret key sharing by
combining emerging techniques of QKD and CR-based key generation (CRKG).
Exploiting laws of quantum physics and properties of wireless channels, the
proposed scheme is able to ensure the secrecy of the key, even against
computationally unbounded adversaries. The basic mechanism is elaborated for a
single-user case and it is extended into a multi-user case by redesigning a
multi-user edge forwarding strategy. In addition, to make CR-QKD more
practical, some enhancement strategies are studied to reduce the time delay and
to improve the secret key generation rate in a secure manner. A prototype of
CR-QKD is demonstrated in a metropolitan area network, where secret keys are
shared between two remote IoT devices that are roughly fifteen kilometers apart
from each other. The experimental results have verified that CR-QKD allows a
secret key rate of 424 bits per second with a retransmission rate of 2.1%. | Source: | arXiv, 2301.01453 | Services: | Forum | Review | PDF | Favorites |
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