Many-agent controlled teleportation of multi-qubit quantum information

We present a general idea to construct methods for multi-qubit quantum teleportation between two remote parties with control of many agents in the network. Our methods seem to be much simpler than the existing method proposed recently [Phys. Rev. A 70 (2004) 022329]. We then demonstrate our idea by using several different protocols of quantum key distribution, including Ekert91 and the deterministic secure communication protocol raised by Deng and Long.