Researching on Quantum Secure Communication based on Blockchain

The quantum secure communication is still in the early stages of implementation. The proposal of Quantum Key Distribution (QKD), while theoretically ensuring unconditional security in key distribution, presents practical challenges in the described communication scenarios. For instance, there are issues such as low key-distribution efficiency and the inability to achieve end-to-end identity authentication. In this paper, we have established a distributed quantum secure communication identity authentication system. We achieve end-to-end identity authentication and encrypted communication between communication terminals through a distributed authentication framework. At the same time, we utilize blockchain for storing transaction information. Blockchain, with its features of immutability, resistance to single points of failure and data corruption, and transparency, ensures that transaction information is publicly transparent and can be queried at any time. This design guarantees the tamper-proof nature of transaction information, thereby ensuring the uniqueness of the allocated keys and enhancing the security of the keys.