US 12,219,052 B2
Blockchain network security communication method based on quantum key
Fei Zhou, Jinan (CN); and Jie Gao, Jinan (CN)
Assigned to JINAN INSTITUTE OF QUANTUM TECHNOLOGY, Jinan (CN)
Appl. No. 18/704,941
Filed by JINAN INSTITUTE OF QUANTUM TECHNOLOGY, Jinan (CN)
PCT Filed May 25, 2022, PCT No. PCT/CN2022/095087
§ 371(c)(1), (2) Date Apr. 26, 2024,
PCT Pub. No. WO2023/082599, PCT Pub. Date May 19, 2023.
Claims priority of application No. 202111323068.X (CN), filed on Nov. 10, 2021.
Prior Publication US 2024/0421986 A1, Dec. 19, 2024
Int. Cl. H04L 9/08 (2006.01); H04L 9/00 (2022.01); H04L 9/40 (2022.01)
CPC H04L 9/0852 (2013.01) [H04L 9/0819 (2013.01); H04L 9/50 (2022.05); H04L 63/0428 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A secure communication method, applied to a quantum-secured blockchain network, wherein the blockchain network comprises a blockchain subnet and a quantum key distribution subnet, the blockchain subnet comprises a plurality of blockchain nodes, the quantum key distribution subnet comprises a plurality of quantum key distribution nodes deployed in the blockchain nodes and connected to the blockchain nodes respectively, and the secure communication method comprises:
a quantum key distribution step for generating a shared quantum key between two of the quantum key distribution nodes;
a connection information upload step for uploading correspondence of the blockchain node to a quantum key management device in the quantum key distribution node connected to the blockchain node to the blockchain subnet;
a quantum key acquisition step for acquiring the shared quantum key by the blockchain node from the quantum key distribution node connected to the blockchain node, based on a communication service; and
a secure communication step for securely transmitting transmission data by the blockchain nodes using the shared quantum key, wherein the quantum key acquisition step comprises: acquiring an identity of the quantum key management device in a receiver from the blockchain subnet by a sender, and acquiring the shared quantum key for the sender and the receiver based on the identity by the sender from the quantum key management device in the quantum key distribution node deployed in the sender; and acquiring the shared quantum key from the quantum key management device by the receiver based on the identity, wherein the sender and the receiver are among the blockchain nodes.