Provided in the embodiments of the present application are a cross-domain
intercom group communication
system, method and apparatus, and a device and a medium. In the present application, a first
quantum security software development kit sends to a first
quantum key
system a key application request for the communication of a group, receives first
authentication code information and a key identifier that are sent by means of the first
quantum key
system, and sends group information of the group, the first
authentication code information and the key identifier to a second quantum
security software development kit; the second quantum
security software development kit sends an identity token of the second quantum security
software development kit, the group information, the first
authentication code information and the key identifier to a second quantum key system; the second quantum key system determines verified authentication code information; and a second
intercom terminal establishes communication with a first
intercom terminal by means of the verified authentication code information, such that the first intercom terminal and the second intercom terminal can communication with each other even if they are terminals in an intercom group of a cross-domain quantum
resource pool.