Abstract
Quantum teleportation allows an unknown quantum state to be transmitted from one place to another with the aid of classical communication by first preparing an EPR pair for the sender and the receiver. We propose a novel quantum key distribution protocol based on this idea. This protocol does not require the sender and the receiver to choose between alternative measurements, which improves the rate of generating key bits from the transmitted bits and is hard for an eavesdropper to access information. However, our scheme needs reliable Bell operator measurements and the expensive resource, two Bell states each round. The security of our schemes discussed and compared with others.