Performance limits for single-photons, correlated-photons, and entangled photons for quantum key distribution over fiber optics network topologies

2015 ◽  
Author(s):  
Eric Donkor ◽  
Fahad Althowibi ◽  
Ryan Williams
Keyword(s):  
Fiber Optics ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Single Photons ◽  
Entangled Photons ◽  
Performance Limits ◽  
Network Topologies

Quantum cryptography: Theoretical protocols for quantum key distribution and tests of selected commercial QKD systems in commercial fiber networks

2016 ◽  
Vol 14 (02) ◽  
pp. 1630002
Author(s):  
Monika Jacak ◽  
Janusz Jacak ◽  
Piotr Jóźwiak ◽  
Ireneusz Jóźwiak
Keyword(s):  
Quantum Cryptography ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Current Status ◽  
Entangled Photons ◽  
Fiber Networks ◽  
System Improvement ◽  
Metropolitan Networks

The overview of the current status of quantum cryptography is given in regard to quantum key distribution (QKD) protocols, implemented both on nonentangled and entangled flying qubits. Two commercial R&D platforms of QKD systems are described (the Clavis II platform by idQuantique implemented on nonentangled photons and the EPR S405 Quelle platform by AIT based on entangled photons) and tested for feasibility of their usage in commercial TELECOM fiber metropolitan networks. The comparison of systems efficiency, stability and resistivity against noise and hacker attacks is given with some suggestion toward system improvement, along with assessment of two models of QKD.

Cryptanalysis of a Practical Quantum Key Distribution with Polarization-Entangled Photons

2005 ◽  
Vol 5 (3) ◽  
pp. 181-186
Author(s):  
Th. Beth ◽  
J. Muller-Quade ◽  
R. Steinwandt
Keyword(s):  
Quantum Cryptography ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Key Exchange ◽  
Authentication Scheme ◽  
Entangled Photons ◽  
Key Exchange Protocol

Recently, a quantum key exchange protocol has been described\cite{PFLM04}, which served as basis for securing an actual bank transaction by means of quantum cryptography \cite{ZVS04}. The authentication scheme used to this aim has been proposed by Peev et al. \cite{PML04}. Here we show, that this authentication is insecure in the sense that an attacker can provoke a situation where initiator and responder of a key exchange end up with different keys. Moreover, it may happen that an attacker can decrypt a part of the plaintext protected with the derived encryption key.

scholarly journals Chaotic Quantum Key Distribution

Cryptography ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 24
Author(s):  
Noah Cowper ◽  
Harry Shaw ◽  
David Thayer
Keyword(s):  
Quantum Computing ◽  
Quantum Key Distribution ◽  
Single Photon ◽  
Photon Emission ◽  
Key Distribution ◽  
Maximum Amount ◽  
Single Photons ◽  
Single Photon Emission ◽  
Amount Of Information ◽  
Communication Scheme

The ability to send information securely is a vital aspect of today’s society, and with the developments in quantum computing, new ways to communicate have to be researched. We explored a novel application of quantum key distribution (QKD) and synchronized chaos which was utilized to mask a transmitted message. This communication scheme is not hampered by the ability to send single photons and consequently is not vulnerable to number splitting attacks like other QKD schemes that rely on single photon emission. This was shown by an eavesdropper gaining a maximum amount of information on the key during the first setup and listening to the key reconciliation to gain more information. We proved that there is a maximum amount of information an eavesdropper can gain during the communication, and this is insufficient to decode the message.

scholarly journals Experimental investigation of high-dimensional quantum key distribution protocols with twisted photons

Quantum ◽  
2018 ◽  
Vol 2 ◽  
pp. 111 ◽  
Author(s):  
Frédéric Bouchard ◽  
Khabat Heshami ◽  
Duncan England ◽  
Robert Fickler ◽  
Robert W. Boyd ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
High Dimensional ◽  
Multiple Quantum ◽  
Single Photons ◽  
Experimental Conditions ◽  
Differential Phase Shift ◽  
Secure Information ◽  
Experimental Apparatus ◽  
First Time

Quantum key distribution is on the verge of real world applications, where perfectly secure information can be distributed among multiple parties. Several quantum cryptographic protocols have been theoretically proposed and independently realized in different experimental conditions. Here, we develop an experimental platform based on high-dimensional orbital angular momentum states of single photons that enables implementation of multiple quantum key distribution protocols with a single experimental apparatus. Our versatile approach allows us to experimentally survey different classes of quantum key distribution techniques, such as the 1984 Bennett & Brassard (BB84), tomographic protocols including the six-state and the Singapore protocol, and to investigate, for the first time, a recently introduced differential phase shift (Chau15) protocol using twisted photons. This enables us to experimentally compare the performance of these techniques and discuss their benefits and deficiencies in terms of noise tolerance in different dimensions.

Mediated Semi‐Quantum Key Distribution Using Single Photons

2019 ◽  
Vol 531 (8) ◽  
pp. 1800347 ◽  
Author(s):  
Po‐Hua Lin ◽  
Chia‐Wei Tsai ◽  
Tzonelih Hwang
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Single Photons
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