You don't need teleportation for secure comms; you just need pairs of entangled qubits (at which point you can just use their measurements as a one-time pad).

You don't need teleportation for secure comms; you just need pairs of entangled qubits (at which point you can just use their measurements as a one-time pad). That said, if you really want to amplify your transmission rate, you'll also need massive ensembles of entangled qubits (i.e. instead of pairs, you'd need N-tuples). Entanglement gets much, much harder to sustain as the ensemble size goes up. Oh, and you'll also want to replenish your entangled ensembles on a regular basis, since they decohere over time, and you can't reuse them across messages (since measurement destroys entanglement)...