No abstract

Computational ghost imaging (Computational GI) is a method of acquiring object information by measuring light field intensity, which would be used to achieve imaging in a complicated environment. The main issue to be addressed in computational GI technology is how to achieve rapid and high-quality imaging while assuring the secure transmission of detection data in practical distant imaging applications. In order to address the mentioned issues, this paper proposes a remote secure computational GI method based on quantum communication technology. Using the quantum key distribution (QKD) network, the computational GI system can be reconstructed while solving the problem of information security transmission between the detector and the reconstructed computing device. By exploring the influence of different random measurement matrices on the quality of image reconstruction, it is found that the randomness of the matrix is positively correlated with the imaging quality. The higher the randomness, the higher the imaging quality. Based on this discovery, a new type of quantum cryptography measurement matrix is constructed using quantum cryptography with high randomness. In addition, through further orthogonalization and normalization of the matrix, the matrix has both good randomness and orthogonality, and high-quality imaging results can be obtained at a low sampling rate. The feasibility and effectiveness of the method are verified by random detection, numerical simulation, and simulation imaging experiments. Compared with the traditional computational GI system, the method proposed in this paper has higher transmission security, rapid imaging, and high-quality imaging under this premise, which provides a new idea for the practical development of computational GI technology.

No abstract

In view of the safety problem of current mobile security payment encryption schemes, this paper proposed a quantum key-based MSP (mobile security payment) scheme. First, this scheme introduced quantum encryption technology to solve the symmetric key problem between the payment platform server and the commercial supermarket server. Then, the quantum key was safely obtained and the QR (quick response) code was generated by using the proposed quantum key gateway. Finally, the mobile device finished the payment according to the one-time pad encryption scheme. Compared with the existing schemes, the proposed scheme can fully employ the advantages of quantum encryption technology. It can also resist multiple security threats by using the quantum key gateway. Under the real quantum key distribution and quantum key gateway environment, the feasibility and effectiveness of this scheme were proven by experimental results.