With the development of smart grids, the demand for cybersecurity is increasing rapidly. Quantum Key Distribution (QKD), which can theoretically achieve secure information transmission, has the potential to enhance the security of power communication. To overcome the structural limitations and resource constraints of current QKD-based communication schemes, this paper proposes a multi-resource hybrid QKD-based communication scheme for power grids. This scheme meets the diverse secure communication needs of power systems through the coordinated utilization of multiple QKD resources. First, the advantages and disadvantages of satellite, fiber, and wireless QKD methods, along with their respective application scenarios, are analyzed. Then, considering the synergistic effects of hybrid QKD and the varied demands of power businesses, a quantum resource deployment optimization model is established. This model aims to minimize the system’s information risk index and is reformulated as a solvable mixed-integer linear programming (MILP) problem. Finally, the effectiveness of the proposed scheme is validated using a modified IEEE RTS-79 test system and two real-world power communication systems. By analyzing on sensitivity, adaptability, scalability and IoT applications of various QKD methods, this study provides valuable insights for the large-scale deployment of quantum-secure power communication networks in the future.
With the development of smart grids, the demand for cybersecurity is increasing rapidly. Quantum Key Distribution (QKD), which can theoretically achieve secure information transmission, has the potential to enhance the security of power communication. To overcome the structural limitations and resource constraints of current QKD-based communication schemes, this paper proposes a multi-resource hybrid QKD-based communication scheme for power grids. This scheme meets the diverse secure communication needs of power systems through the coordinated utilization of multiple QKD resources. First, the advantages and disadvantages of satellite, fiber, and wireless QKD methods, along with their respective application scenarios, are analyzed. Then, considering the synergistic effects of hybrid QKD and the varied demands of power businesses, a quantum resource deployment optimization model is established. This model aims to minimize the system’s information risk index and is reformulated as a solvable mixed-integer linear programming (MILP) problem. Finally, the effectiveness of the proposed scheme is validated using a modified IEEE RTS-79 test system and two real-world power communication systems. By analyzing on sensitivity, adaptability, scalability and IoT applications of various QKD methods, this study provides valuable insights for the large-scale deployment of quantum-secure power communication networks in the future.
The growing integration of power grids with communication networks underscores the critical importance of cybersecurity. Quantum key distribution (QKD) offers a potent approach to secure power information based on physics laws. However, the challenge of limited quantum keys due to low key rates remains unresolved, necessitating the optimal planning of QKD networks. Therefore, this paper proposes a QKD network planning method to address uncertainties in power communication. First, the fiber QKD-based communication network is introduced. Then, the QKD network planning problem is formulated as a two-stage stochastic mixed-integer linear programming (MILP) model. The first stage models the quantum device deployment considering QKD processes and investment budgets. The second stage takes demand response as an example, considering scenario-dependent communication requests that fluctuate with the output of renewable energy resources. Finally, the proposed method is validated by a modified IEEE 30-bus system, with numerical results verifying its effectiveness in improving power cybersecurity.
The smart grid relies on information and communication technology to enhance capabilities and electricity management, with information technology aimed at safeguarding the power grid. However, despite leveraging modern communication systems, the smart grid still faces various security challenges. In this paper, we present our work on implementing quantum key distribution (QKD) in the smart grid. Unlike previous approaches, we designed and evaluated separate wired and wireless key distribution mechanisms to securely distribute keys to the terminals. Our experimental results verified that the bit error rate (BER) of the wired key distribution is below 1.5%, and the code rate exceeds 3 Mbps when the transmission distance is less than 10 km. Additionally, we analyzed the performance of wireless key distribution mechanisms. Through theoretical analysis and application scenario evaluation, we demonstrated the feasibility of using QKD to ensure the security of the smart grid.
To meet the increasing demand for electricity and to have a more reliable and resilient electric grid against conventional and extreme events, grid modernization is more crucial now than ever before. This will require the development and deployment of devices that provide advanced communication capabilities. The overall efficiency, reliability, and resilience of the smart grid will be inextricably linked to the exchange of information between these devices. Unfortunately, the increased information flow will increase the potential attack surface and introduce new vulnerabilities. While a smarter grid will depend critically on information flow, these benefits will be accrued only if that information can be protected. Nowadays, information is secured in smart grids primarily through cryptography. However, with the increasing number of sophisticated attacks as well as the increasing computational power, the security of the “classical” cryptographic algorithms is threatened. Quantum information science offers solutions to this problem, specifically quantum key distribution (QKD), which provides a means for the generation and secure distribution of symmetric cryptographic keys. The security of QKD stems ultimately from the very nature of quantum physics. In this paper, we investigate the applicability of QKD to the various smart grid sectors and specific use cases. We have identified 18 smart grid use cases of interest for QKD suitability together with 7 QKD factors used for the assessment of the various use cases. For each use case, the impact to security of the loss of confidentiality, integrity, and/or availability is specified. In addition, the suitability of QKD is assessed for each use case with respect to multiple factors.
The integration of digital technologies into power grids, including smart grids and renewable energy systems, has enhanced their efficiency but introduced new vulnerabilities, particularly regarding communication security. Traditional communication methods are insufficient to address sophisticated interference, such as jamming. This research proposes a hybrid quantum communication system combining Quantum Key Distribution (QKD) and an Adaptive Anti-Jamming Module (AAJM) to secure power grid communications against interference. Existing research has focused mainly on theoretical applications of quantum communication, with limited attention to practical deployment in dynamic environments like power grids. The proposed system integrates QKD for secure key exchange and AAJM for real-time adjustment of communication parameters, ensuring stable communication under interference. The system was tested under continuous wave, burst, and reactive jamming, with results showing a key generation rate of 100±5 kbps, throughput of 9.8 Mbps, and a low Bit Error Rate (BER) of 0.02%. In comparison, traditional methods like frequency hopping and DSSS showed lower performance, with throughput of 7.3 Mbps and higher BER of 0.85%. This study advances secure communication systems for critical infrastructures, providing a practical solution to mitigate interference. The results demonstrate the potential of hybrid quantum communication systems to improve power grid security and resilience.
Quantum communication is a promising technique for enhancing the information security. However, the limited availability of quantum keys due to low generation rates still remains a challenge in the quantum key distribution of power systems. To address this issue and optimize the utilization of quantum resources in the gradually developed quantum-secured power communication systems, this article proposes a hybrid resource optimization method by leveraging network virtualization technologies. First, we present a virtualized architecture using software-defined networking and network function virtualization to support multiapplication scenarios in power system communications. Subsequently, a two-stage resource optimization strategy is proposed to manage both classical and quantum resources. At the first stage, we design a network slicing scheme for allocating classical communication resources, such as channel capacity and time delay. This scheme aims to segregate information flows from applications with diversified quality of service requirements. At the second stage, encryption resources are allocated by matching limited quantum keys with communication requests with different priorities, thereby improving the overall performance of quantum-classical power communication systems. Finally, we construct a cosimulation testbed to validate the effectiveness of the proposed method through case studies.
Smart grid depends on an advanced communication network to collect information from the power grid, and to disseminate control commands to the control devices. To safeguard the power grid, it is crucial to ensure information confidentiality in the communication networks. Quantum key distribution (QKD) protocols help in generating, and distributing secret keys between communication parties, and such secret keys are required in symmetric cryptography. The combination of QKD protocols, and symmetric cryptography are known to be unconditionally secure, which means information confidentiality can be guaranteed even against an eavesdropper, who has unlimited resources. This article provides a concise review of existing works on QKD protocols, and their applications in smart grid communications. Deploying QKD protocols in smart grid is challenging because distance between the control center, and control devices can be larger than the limits of existing protocols. Also, QKD protocols require an expensive quantum channel between each pair of sender, and receiver nodes, and there is large number of control devices with diverse capabilities in smart grid. We have classified existing works based on the challenges they have dealt with. Compared to the rich literature on QKD protocols in general, there are significantly fewer works in the specific context of smart grid. This can be an indication for opportunity to make a significant contribution. We have also identified a few research challenges that can be potential future works.