A novel quantum key in distributed networks

In the distributed network, quantum teleportation can teleport a quantum state from one quantum device to a remote site by using quantum entangled particles. Quantum entangled particles have the correlation among sharing party of distributed node to form a special relation for transmitting quantum message and classical message. In the paper, we derive a novel quantum key with indirect communication among sharing party. In the deriving process, random measurement outcome can resist eavesdropping from the outsider. An attacker is unable to break a secret quantum key in the deriving process. In addition, several types of attack in the transmission security can be considered in the distributed networks.