With the rapid development of 6G technology, people’s lives are becoming increasingly convenient. Simultaneously, great emphasis must be placed on the security demands of this communication technology. We propose two encryption methods for 6G communication security based on different encryption scenarios: a Quantum Key Distribution (QKD)-Secured 6G fronthaul communication architecture for high-security scenarios and a QKD-Secured 6G fronthaul communication architecture for low-security scenarios. For high-security scenarios, the QKD-Secured 6G fronthaul communication architecture utilizes multiple quantum transmitters and corresponding quantum receivers to generate multiple quantum keys simultaneously, significantly enhancing security requirements for high communication rates. However, due to its high cost, this setup is not always practical. In most applications, we adopt a QKD-Secured 6G fronthaul communication architecture for low-security scenarios. In this approach, a single quantum transmitter corresponds to multiple quantum receivers, which, while potentially reducing the quantum key generation speed, significantly lowers costs. We address the reduced key rate by adjusting the information load on each key pair. The proposed architecture largely satisfies the security requirements of 6G, broadening its application scenarios. As a crucial technology for communication security, QKD offers high security, strong resistance to attacks, and flexibility. With its continued development and adoption, QKD is expected to play an increasingly significant role in future communication networks.
With the rapid development of 6G technology, people’s lives are becoming increasingly convenient. Simultaneously, great emphasis must be placed on the security demands of this communication technology. We propose two encryption methods for 6G communication security based on different encryption scenarios: a Quantum Key Distribution (QKD)-Secured 6G fronthaul communication architecture for high-security scenarios and a QKD-Secured 6G fronthaul communication architecture for low-security scenarios. For high-security scenarios, the QKD-Secured 6G fronthaul communication architecture utilizes multiple quantum transmitters and corresponding quantum receivers to generate multiple quantum keys simultaneously, significantly enhancing security requirements for high communication rates. However, due to its high cost, this setup is not always practical. In most applications, we adopt a QKD-Secured 6G fronthaul communication architecture for low-security scenarios. In this approach, a single quantum transmitter corresponds to multiple quantum receivers, which, while potentially reducing the quantum key generation speed, significantly lowers costs. We address the reduced key rate by adjusting the information load on each key pair. The proposed architecture largely satisfies the security requirements of 6G, broadening its application scenarios. As a crucial technology for communication security, QKD offers high security, strong resistance to attacks, and flexibility. With its continued development and adoption, QKD is expected to play an increasingly significant role in future communication networks.
The transition from 5G to 6G networks introduces significant advancements in speed, latency, and connectivity, but also raises critical security concerns. The increasing number of devices that need to be plugged into the network makes the demand for enhanced security and efficiency paramount. This paper proposes a novel Quantum-Encrypted 6G Fronthaul Network Architecture, integrating quantum communication with passive wavelength division multiplexing technology to address the security challenges in next-generation networks. The architecture ensures theoretically unbreakable encryption by utilizing quantum key distribution techniques on top of the current passive WDM fronthaul network architecture. It reduces the difficulty and cost of network upgrades while maintaining high bandwidth utilization and scalability. By deploying quantum communication devices in Active Antenna Units and Distributed Units, the proposed system enhances the security of the fronthaul link, protecting against eavesdropping and cyber attacks. The results obtained through simulation demonstrate that the system is highly resistant to dark counts, detection efficiency, and photon pulse variations, ensuring reliable key distribution over long distances. This architecture not only provides a cost-effective upgrade path for existing 5G networks but also paves the way for secure, high-capacity communication in future 6G applications, such as autonomous systems, smart cities, and critical infrastructure.
In the digital age, 5G technology has significantly enhanced global communication capabilities, providing strong support for various industries. However, 5G falls short of achieving comprehensive intelligence within the Internet of Things (IoT), propelling the development of 6G technology. 6G is expected to further enhance network performance by integrating advanced technologies such as AI and quantum communication, while expanding application scenarios to include communication in extreme environments for comprehensive global connectivity. This paper proposes an innovative fronthaul architecture that applies Quantum Key Distribution (QKD) technology to the 5G fronthaul, leveraging its unconditionally secure key generation and distribution mechanism. In this design, costlier Alice devices are placed on the AAU side, while less expensive Bob devices are positioned on the DU side, optimizing deployment to reduce engineering costs and lower deployment barriers. The feasibility of this architecture is demonstrated by calculating the secure key rate. Comparative analysis with existing research is performed to clarify future research directions. These innovations not only enhance 5G network security but also offer new solutions for the security requirements of 6G networks, such as data security, network resilience, and algorithm transparency. Our research offers strategic value for future network security, laying the groundwork for reliable networks.
The rapid evolution of mobile communication technology from 5G to 6G brings great opportunities but also poses serious security and privacy challenges. Although 6G networks offer advantages such as ultra-low latency, extremely high data rates, and massive connectivity, their decentralized, AI-driven, and highly virtualized architecture makes them more vulnerable to cyber-attacks. Traditional encryption methods are increasingly incapable of defending against emerging attacks. To address this issue, this paper proposes an innovative quantum-secured passive WDM fronthaul architecture that integrates BB84-based Quantum Key Distribution (QKD) with existing WDM fiber communication technology, balancing high security with feasibility. The architecture adopts an asymmetric design: low-cost quantum transmitters are deployed at distributed AAU sites, while high-performance quantum receivers are centrally installed at DU sites. This significantly reduces hardware costs and simplifies large-scale deployment. In addition, a centralized Key Management Center (KMC) is introduced to enable dynamic key distribution and real-time updates, further enhancing the system’s security and operational efficiency. Simulation results show that under a fiber attenuation of 0.20 dB/km and a detection efficiency of 10%, the system can maintain a relatively high secure key rate and an acceptable quantum bit error rate (QBER) over a transmission distance of 170 km. Furthermore, by optimizing key parameters such as detection efficiency, fiber attenuation coefficient, and the average photon number per pulse, the system’s key generation rate and secure transmission distance can be further improved.
As sixth-generation (6G) wireless networks come into existence, there is more ever-growing demand for high-speed and secure communication than ever before. Conventional cryptographic methods are facing growing constraints to keep pace with the challenging reality of cyberattacks. Quantum-based communication technologies like quantum key distribution (QKD), quantum encryption, and quantum-resistant protocols provide an inherently secure means of transmitting data. This study examines how quantum communication technologies can be embedded within 6G architectures to provide enhanced data protection. With the help of AI and machine learning, 6G networks are able to anticipate threats and counter them, and quantum technologies offer unbreakable physical-layer encryption. Proposed work examines the security, architectural requirements, and implementation practicalities of this integration. In addition, we discussed the potential effect of quantum computing on present cryptographic techniques and describe future research directions for deployment at scale of quantum-secure communication in next-generation wireless systems.
The rapid evolution of mobile communication technology is propelling us from the era of 5G to the cusp of 6G, which promises ultra-high speeds, ultra-low latency, and seamless global connectivity. However, these ambitious goals require not only significant advancements in traditional communication technologies but also the integration of novel approaches to address emerging security and efficiency challenges. Quantum communication, particularly Quantum Key Distribution (QKD), offers a groundbreaking solution due to its inherent security based on the principles of quantum mechanics. This paper proposes an innovative architecture that combines QKD with Passive Wavelength Division Multiplexing (WDM) for 6G fronthaul networks. The architecture, which includes components for signal transmission, processing, and monitoring, uses WDM to transmit both quantum signals and classical signals over a single fiber, optimizing resource utilization, ensuring security, and enhancing reliability. The quantum signals are detected by single-photon detectors to generate secure keys, while the classical signals carry regular communication data. The passive WDM system efficiently uses fiber resources, is cost-effective, and is easy to upgrade, making it highly compatible with classical optical communication. Extensive simulation experiments are conducted to evaluate the impact of key parameters such as transmission distance, attenuation coefficient, photon count per pulse, dark count rate, and detection efficiency on the secure key rate and quantum error rate. The results indicate that careful optimization of these parameters can substantially enhance system performance, making the architecture highly suitable for high-security transmission scenarios in 6G networks. This research provides new insights into the integration of quantum and classical communications in 6G fronthaul networks, demonstrating the potential of quantum-enhanced 6G networks.
The advancement of 6G networks demands high-capacity, ultra-low latency, and secure communication infrastructure. Traditional fronthaul solutions face significant challenges in meeting these demands due to increasing data traffic, network densification, and security vulnerabilities. To address these issues, this paper proposes an innovative 6G passive Wavelength Division Multiplexing (WDM) fronthaul architecture integrated with Quantum Key Distribution (QKD). By leveraging quantum cryptographic principles, our approach ensures unbreakable security and protects network transmissions from potential cyber threats and eavesdropping attacks. The proposed architecture effectively combines high-speed optical transmission with quantum-secured key exchange, optimizing network reliability and reducing security risks. Through comprehensive simulations, we evaluate key performance factors, including secure key rate (SKR), quantum bit error rate (QBER), detector efficiency, and quantum transmission loss. Results indicate that our architecture maintains high SKR with minimal QBER, even under challenging transmission conditions, ensuring robust quantum-secured communication. Additionally, the passive nature of WDM significantly reduces power consumption and maintenance costs, improving network sustainability. This research establishes a practical pathway for integrating quantum security into next-generation optical fronthaul networks, enabling highly secure, scalable, and efficient data transmission for future 6G applications, including autonomous vehicles, smart cities, and industrial IoT.