Quantum secure direct communication system irrelevant to measurement device

Abstract

The embodiment of the invention provide a quantum secure direct communication system irrelevant to a measurement device. The quantum secure direct communication system comprise a transmitting end, a receiving end, and a third party, wherein the transmitting end and the receiving end respectively prepare a first photon sequence and a third photon sequence for security detection and send the first photon sequence and the third photon sequence to the third party for measurement, then the transmitting end and the receiving end perform security detection according to the measurement results, afterthe security detection is passed, the transmitting end loads information to be transmitted into a pre-constructed second photon sequence and sends the information to be transmitted to the third party,the receiving end sends a fourth photon sequence to the third party, and the third party sends the measurement results of the second photon sequence and the fourth photon sequence to the receiving end to complete a communication process, wherein the first photon sequence and the second photon sequence comprise mutually entangled photon pairs; and the third photon sequence and the fourth photon sequence comprise mutually entangled photon pairs. The quantum secure direct communication system provided by the invention can avoid security vulnerabilities caused by a detection device under the premise of ensuring the communication security.

Description

technical field

[0001] The embodiments of the present invention relate to the field of quantum communication, and in particular to a measurement device-independent quantum secure direct communication system. Background technique

[0002] Most of the implementation schemes of classic information transmission security are that the information sender encrypts the plaintext with a key to ciphertext, and after transmission, the information receiver uses the key to decrypt the ciphertext into plaintext. The security of the key system that the key generation and distribution of this process relies on belongs to computational security. That is, the key cannot be cracked within an effective time with the existing classical computer level. However, with the development of quantum computer-related research and the emergence of quantum algorithms, the classical key system that traditionally relies on computational security has been threatened.

[0003] Quantum secure communication is ...

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