US 12,457,042 B2
Quantum secure direct communication method and apparatus based on one-way transmission, device and system
Guilu Long, Beijing (CN); Dong Pan, Beijing (CN); Penghao Niu, Beijing (CN); Haoran Zhang, Beijing (CN); Feihao Zhang, Beijing (CN); Min Wang, Beijing (CN); Chao Zheng, Beijing (CN); and Xiuwei Chen, Beijing (CN)
Assigned to Beijing Academy of Quantum Information Sciences, Beijing (CN)
Filed by Beijing Academy of Quantum Information Sciences, Beijing (CN)
Filed on Mar. 24, 2023, as Appl. No. 18/125,840.
Prior Publication US 2024/0322914 A1, Sep. 26, 2024
Int. Cl. H04B 10/70 (2013.01); G06N 10/70 (2022.01); G06N 10/00 (2022.01); H04L 9/08 (2006.01)
CPC H04B 10/70 (2013.01) [G06N 10/70 (2022.01); G06N 10/00 (2019.01); H04L 9/0852 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A quantum secure direct communication method based on a one-way transmission, applied to a transmitting terminal in a quantum communication system, the quantum secure direct communication method comprising:
performing error-correction and anti-loss encoding on a to-be-transmitted message, and obtaining a code word corresponding to the to-be-transmitted message;
encrypting the code word by using an encryption key negotiated with a receiving terminal, and obtaining a ciphertext message corresponding to the encrypted code word; and
encoding the ciphertext message onto a quantum state, and transmitting quantum state information obtained to the receiving terminal through a quantum channel;
wherein encoding the ciphertext message onto the quantum state comprises: randomly selecting, by the transmitting terminal, a base vector for each character in the ciphertext message, and encoding the character to convert the character into the quantum state information.