Key distribution system and key distribution method based on multiuser remote communication

Abstract

The invention discloses a key distribution system and a key distribution method based on multiuser remote communication. Quantum key synchronization between each user terminal and a central management system is realized in a manner of carrying a key relay server by an aerial vehicle. Then the central management system distributes a session key to a user terminal which requires participation into communication in a quantum key encrypted session key manner. A data packet only requires session key encryption, thereby realizing a purpose of multi-user-terminal communication. The key distribution system and the key distribution method ensure absolute safety in multiple-party communication and prevent a high-standard requirement for a QKD system in a one-packet and one-key manner so that quantum encrypted communication is suitable for a large-scale multiple-party communication occasion. Furthermore, establishing of a quantum channel between each user terminal and the central management system is not required. Not only is a problem of quantum information attenuation in remote channel transmission settled, but also a problem of difficult quantum channel disposition is alleviated.

Description

technical field [0001] The invention relates to the technical field of secure communication, in particular to a key distribution system and method based on multi-user remote communication. Background technique [0002] With the widespread popularization of the Internet, information transmission among human beings has reached an unprecedented quantity and frequency, and various private information is increasingly exposed on the Internet. Therefore, human beings' demand for confidential communication has also reached an unprecedented height. The current Internet information security encryption method is called "public key" cryptography system. Its principle is to generate a public key that spreads on the network and a private key that stays inside the computer through an encryption algorithm. The two keys must match Use to achieve a complete encryption and decryption process. [0003] The encryption standard used by the modern Internet is the RSA algorithm born in the 1970s, ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a key distribution system and method based on multi-user remote communication, to solve the problem that the QKD-based network key generation rate in the prior art is low, and it is difficult to realize the requirement of one packet for one encryption; in addition, from The key obtained in the QKD network can only be shared between two nodes connected through a quantum channel, and cannot be applied to multi-party communication on a large scale, which has caused a great technical defect that limits the development of quantum encryption communication.

Images