arXiv:quant-ph/0612208 · Journal of Physics Condensed Matter

Quantum key distribution using quantum Faraday rotators

Taeseung Choi, Mahn-Soo Choi

Published Jun 13, 2008• 12 citations

Abstract

We propose a new quantum key distribution (QKD) protocol based on the fully quantum mechanical states of Faraday rotators. The protocol is unconditionally secure against collective attacks for a multi-photon source of up to two photons on a noisy environment. It is also robust against impersonation attacks. The protocol may be implemented experimentally with the current spintronics technology on semiconductors.

DOI: 10.1088/0953-8984/20/27/275242

Related papers

Quantum Key Distribution Using Quantum Faraday Rotators

Choi, T, Choi, M S

We propose a new quantum key distribution (QKD) protocol based on the fully quantum mechanical states of the Faraday rotators. The protocol is unconditionally secure against eavesdropping for single-photon source on a noisy environment and robust against impersonation attacks. It also allows for unconditionally secure key distribution for multiphoton source up to two photons. The protocol could be implemented experimentally with the current spintronics technology on semiconductors.

Dec 26, 200615 citations

A NEW QUANTUM KEY DISTRIBUTION PROTOCOL BASED ON QUANTUM FARADAY ROTATION

Taeseung Choi, Mahn‐Soo Choi

We propose a new quantum key distribution (QKD) protocol, which exploits the maximal entanglement between home qubits and flying qubits induced by means of quantum Faraday rotation (QFR). The entanglement between the flying and home qubits provides the essential part of the security of the protocol. We also discuss possible experimental implementations, the optical cavity QED and quantum dots in microcavity, which is feasible in current spintronics technology.

International Journal of Modern Physics BJan 20, 20080 citations

Novel Robust Quantum Key Distribution Protocol with Symmetry

Han Yang, Ming Gao, Ping‐Xing Chen +1 more

Quantum key distribution (QKD) has been proved unconditionally secure. But noise and imperfection of realistic devices are major difficulties for implementing quantum key distribution. Particularly, the birefringence in optical fiber corresponds to an insuppressible collective unitary transformation on the polarization space. Obviously does not change the permutation symmetry of multiphoton state. By encoding on three 3-photon states with different permutation symmetries, we propose a novel polarization-based protocol, which is robust against an arbitrary degree of collective noise. A clear characteristic of this protocol is that entanglement is absent in principle.

Aug 1, 20082 citations

Secure quantum key distribution with a single not-so-weak coherent pulse

Chil-Min Kim, Yong‐Wan Kim, Young-Jai Park

We propose a secure quantum key distribution (QKD) protocol using a single not-so-weak coherent qubit. With two preprocesses for random rotation and compensation, a key bit is encoded to a randomly polarized not-so-weak coherent qubit. We analyze the security of the QKD protocol, which counters the photon number splitting and the impersonation attacks. The estimated mean number of photon, which is less than 6.0, guarantees security. Additionally, we discuss the possibility of quantum secure direct communication.

Optics LettersMar 19, 20073 citations

Robust Polarization-Based Quantum Key Distribution over a Collective-Noise Channel

Jean-Christian Boileau, Daniel Gottesman, Raymond Laflamme +2 more

We present two polarization-based protocols for quantum key distribution. The protocols encode key bits in noiseless subspaces or subsystems and so can function over a quantum channel subjected to an arbitrary degree of collective noise, as occurs, for instance, due to rotation of polarizations in an optical fiber. These protocols can be implemented using only entangled photon-pair sources, single-photon rotations, and single-photon detectors. Thus, our proposals offer practical and realistic alternatives to existing schemes for quantum key distribution over optical fibers without resorting to interferometry or two-way quantum communication, thereby circumventing, respectively, the need for high precision timing and the threat of Trojan horse attacks.

arXiv:quant-ph/0306199Physical Review LettersJan 8, 2004229 citations

DGL22: A practical Quantum key distribution

Mohammed Aldarwbi, Ali Akbar Ghorbani, Arash Habibi Lashkari

Abstract Quantum key distribution (QKD) protocols are unconditionally secure, providing that quantum devices are truthful. Device-independent quantum key distribution (DI-QKD) protocols offer the prospect of distributing secret keys with minimal assumptions. The DI-QKD protocols are hard to implement using the current technologies as they require all the quantum devices to be uncharacterized. Measurement device independent quantum key distribution (MDI-QKD) protocols assume that the measurement devices are not truthful; the adversary might make them. MDI-QKD is secure but more challenging to implement. Receiver-device-independent quantum key distribution (RDI-QKD) protocols assume that the receiver's measurement devices can be viewed as a black box while the sender's device can be trusted. RDI-QKD relies on reasonable assumptions that make it easy to implement using the current state-of-the-art technology. We propose an RDI-QKD protocol, called DGL22. DGL22 is secure against all known attacks that are allowed by quantum mechanics. DGL22 provides several benefits over previous protocols, including the capability to attain high communication and sifting efficiency.

Oct 25, 20220 citations