  We investigate the resources needed for secure teleportation of coherent
states. We extend continuous variable teleportation to include quantum
tele-amplification protocols, that allow non-unity classical gains and a
pre-amplification or post-attenuation of the coherent state. We show that, for
arbitrary Gaussian protocols and a significant class of Gaussian resources,
two-way steering is required to achieve a teleportation fidelity beyond the
no-cloning threshold. This provides an operational connection between Gaussian
steerability and secure teleportation. We present practical recipes suggesting
that heralded noiseless pre-amplification may enable high-fidelity heralded
teleportation, using minimally entangled yet steerable resources.
