Review and Comparison of Quantum Key Distribution Protocols Based on Quantum Teleportation

Abstract

This paper presents a review and compares the two most widely used Quantum key distribution protocols based on quantum teleportation, the BBT84 protocol and the E91 protocol. Quantum key distribution protocols based on quantum teleportation are particularly secure because they are immune to all known attacks by classical adversaries. Both considered protocols work by exploiting the entanglement of photons to generate a shared secret key between two parties. Each protocol possesses its unique strengths and weaknesses. While the BBT84 protocol demonstrates higher efficiency than the E91 protocol, it is concurrently more vulnerable to potential eavesdropping attempts. Conversely, the E91 protocol, albeit less efficient compared to the BBT84 protocol, exhibits heightened resistance to eavesdropping attacks. The paper concludes with a discussion of the prospective advancements of quantum teleportation-based quantum key distribution protocols. Although these protocols are currently in the development phase, these protocols hold the promise of fundamentally transforming secure communication methods.