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)...
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)...