Enter, surviving early quantum access, and teleportation

This is the standard teleportation mechanism Teleportation. It does not reconstruct quantum information from a classical album alone. The quantum carrier is $E$, and the fixed entanglement resource has been included in the complete preparation.

For the exact encrypted construction of Section sec:exactexample, measuring the ciphertext does produce an entanglement-breaking channel even with the accessible key register: that register is already classical in the reduced channel. This is a property of that construction, not of all entanglement-assisted interfaces.