A method for distributing encryption keys in a quantum network surpasses current limits and is immune to all detection attacks, potentially offering a new standard for future implementations of quantum key distribution.
Several vulnerabilities of single-photon detectors have recently been exploited to compromise the security of quantum-key-distribution (QKD) systems. In this Letter, we report the first proof-of-principle implementation of a new quantum-key-distribution protocol that is immune to any such attack. More precisely, we demonstrated this new approach to QKD in the laboratory over more than 80 km of spooled fiber, as well as across different locations within the city of Calgary. The robustness of our fiber-based implementation, together with the enhanced level of security offered by the protocol, confirms QKD as a realistic technology for safeguarding secrets in transmission. Furthermore, our demonstration establishes the feasibility of controlled two-photon interference in a real-world environment and thereby removes a remaining obstacle to realizing future applications of quantum communication, such as quantum repeaters and, more generally, quantum networks.
The rise of quantum computing poses a grave threat to current cryptographic methods. While Quantum Key Distribution (QKD) offers a potential solution, guaranteeing its security in real-world implementations remains challenging. This paper addresses the critical need for robust Quantum Encryption algorithms, emphasizing the importance of standardized evaluation criteria and it explores the limitations of existing evaluation methods, highlighting their shortcomings in comprehensively assessing security against both classical and quantum attacks. Furthermore, a comprehensive framework for evaluating and standardizing Quantum Encryption algorithms is proposed. This framework encompasses not only the algorithm itself but also the security of the generated key. By incorporating a broader range of attack scenarios, theoretical considerations, and key-specific criteria, this framework aims to ensure the confidentiality and integrity of communication in the quantum age.This research is believed to make a significant contribution to the development of secure and standardized Quantum Encryption algorithms. The goal is to safeguard critical information infrastructure against evolving threats. Existing works have placed a strong emphasis on standardizing QKD (Quantum Key Distribution). However, the evaluation of the effectiveness of quantum encryption algorithms lacks the same level of standardization. This gap serves as the motivation behind this work.
With the growth of power demand, software development in the power industry is becoming increasingly important, but the network security problem is severe.Based on the basic principles of quantum mechanics and quantum key distribution protocol, this paper proposes a quantum key adaptive immune distribution strategy based on SDN, which is comprehensively tested and simulated to verify in the laboratory and current network environment.The experimental results show that under the condition of 15dB line loss, the key formation rate of QKD device reaches 107.014kbps, which is much higher than the standard requirement of 1kbps; in the test of overhead fiber, the cumulative loss of the quantum optical channel after adding the dispersion compensation module is only 12.02dB, which is 23.3% lower than that of the synchronous optical channel of 15.67dB.Simulation analysis shows that under the condition of service intensity of 600k and k=4, the key resource utilization of SDN-based quantum key adaptive immune distribution strategy reaches 0.536, which is about 9% higher than the classical key distribution strategy.The study shows that quantum encryption technology can effectively overcome the limitations of traditional encryption methods, provide unconditional security for software development in the power industry, with strong anti-interference ability, flexible key management and other characteristics, which can significantly improve the network security protection ability of the power system, and provide a new way of thinking for the construction of network security barriers for the security detection tools of software development in the power industry.