Abstract
In the era of the interconnection of all things, the security of the Internet of Things (IoT) has become a new challenge. The theoretical basis of unconditional security can be guaranteed by using quantum keys, which can form a QKD network-based security protection system of quantum Internet of Things (Q-IoT). However, due to the low generation rate of the quantum keys, the lack of a reasonable key allocation scheme can reduce the overall service quality. Therefore, this paper proposes a dynamic on-demand key allocation scheme, named DDKA-QKDN, to better meet the requirements of lightweight in the application scenario of Q-IoT and make efficient use of quantum key resources. Taking the two processes of the quantum key pool (QKP) key allocation and the QKP key supplement into account, the scheme dynamically allocates quantum keys and supplements the QKP on demand, which quantitatively weighs the quantum key quantity and security requirements of key requests in proportion. The simulation results show that the system efficiency and the ability of QKP to provide key request services are significantly improved by this scheme.
Highlights
The Internet of Things (IoT), composed of numerous heterogeneous devices, has realized a convenient and efficient communication between things located in physically unconnected places [1,2]
Cao et al [15] proposed a new multi-tenant Quantum key distribution (QKD) network architecture and key rate sharing scheme based on Software Defined Network (SDN) and quantum key pool (QKP) technology, and designed a heuristic algorithm to realize efficient multi-tenant key assignment on the QKD
In the QKD-based quantum Internet of Things (Q-IoT) security protection system, quantum key distribution is achieved with quantum key distribution network (QKDN) and trusted relay technology, and the key storage management of QKP is realized with software-defined network (SDN) technology
Summary
The Internet of Things (IoT), composed of numerous heterogeneous devices, has realized a convenient and efficient communication between things located in physically unconnected places [1,2]. In the current IoT system, a relatively simple method of data encryption, commonly known as lightweight cryptography, is adopted to guarantee the security of data transmission. This method has the risk of being cracked by quantum computers [5], which will lead to a series of challenges, especially those related to the privacy and security of the IoT. Distributing keys by the QKD mechanism can effectively realize the security of data transmission [7,8]. The perception layer realizes the quantum key distribution between the edge gateway and the IoT terminal. How to allocate quantum key resources to satisfy the efficiency and lightweight requirements of Q-IoT applications is an urgent problem to be solved
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