Quantum key distribution system and method based on weak network environment

The invention discloses a quantum key distribution system and method based on a weak network environment. The terminal nodes of the same communication group all acquire the communication group key distributed by the quantum security server, so that the terminal nodes can directly perform quantum encryption and decryption on data based on the communication group key when quantum security communication is performed between the terminal nodes of the same communication group under the weak network condition; key relaying does not need to be carried out between the terminal nodes, and the situation that quantum secure communication between two communication parties is affected due to the fact that key relaying cannot be carried out between the two communication parties in time under the weak network condition is avoided. 本申请公开了一种基于弱网环境的量子密钥分发系统及方法。由于同一通信组的终端节点均获取到量子安全服务端分发的通信组密钥，使得同一通信组的终端节点之间在弱网情况下进行量子安全通信时，该终端节点之间可以直接基于该通信组密钥对数据进行量子加解密，该终端节点之间无需进行密钥中继，避免弱网情况下通信双方之间无法及时密钥中继影响到该通信双方之间的量子安全通信。