scholarly journals The simulation of a symmetric quantum key distribution

2018 ◽  
Vol 434 ◽  
pp. 012023
Author(s):  
M Delina ◽  
B H Iswanto ◽  
H Permana ◽  
S Muhasyah
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Symmetric Quantum

scholarly journals SYMMETRIC COLLECTIVE ATTACKS FOR THE EAVESDROPPING OF SYMMETRIC QUANTUM KEY DISTRIBUTION

2008 ◽  
Vol 06 (supp01) ◽  
pp. 765-771 ◽  
Author(s):  
STEFANO PIRANDOLA
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Symmetric Quantum ◽  
Conjugate Bases

We consider the collective eavesdropping of the BB84 and six-state protocols. Since these protocols are symmetric in the eigenstates of conjugate bases, we consider collective attacks having the same kind of symmetry. We then show how these symmetric collective attacks are sufficiently strong in order to minimize the Devetak–Winter rates. In fact, it is quite easy to construct simple examples able to reach the unconditionally secure key rates of these protocols.

scholarly journals Quantum key distribution with mismatched measurements over arbitrary channels

2017 ◽  
Vol 17 (3&4) ◽  
pp. 209-241
Author(s):  
Walter O. Krawec
Keyword(s):  
Quantum Channel ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Rate Equations ◽  
Quantum Channels ◽  
Multiple Channel ◽  
Symmetric Quantum ◽  
Channel Statistics ◽  
Quantum Protocol ◽  
Measurement Bases

In this paper, we derive key-rate expressions for different quantum key distribution protocols. Our key-rate equations utilize multiple channel statistics, including those gathered from mismatched measurement bases - i.e., when Alice and Bob choose incompatible bases. In particular, we will consider an Extended B92 and a two-way semi-quantum protocol. For both these protocols, we demonstrate that their tolerance to noise is higher than previously thought - in fact, we will show the semi-quantum protocol can actually tolerate the same noise level as the fully quantum BB84 protocol. Along the way, we will also consider an optimal QKD protocol for various quantum channels. Finally, all the key-rate expressions which we derive in this paper are applicable to any arbitrary, not necessarily symmetric, quantum channel.

scholarly journals Six-State Symmetric Quantum Key Distribution Protocol

2015 ◽  
Vol 05 (02) ◽  
pp. 33-40 ◽  
Author(s):  
Makhamisa Senekane ◽  
Mhlambululi Mafu ◽  
Francesco Petruccione
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Symmetric Quantum ◽  
Quantum Key Distribution Protocol

Quantum Key Distribution: Attacks and Solutions

2020 ◽  
Author(s):  
Vimal Gaur ◽  
Devika Mehra ◽  
Anchit Aggarwal ◽  
Raveena Kumari ◽  
Srishti Rawat
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution

scholarly journals Experimental quantum key distribution with simulated ground-to-satellite photon losses and processing limitations

2015 ◽  
Vol 92 (5) ◽  
Author(s):  
Jean-Philippe Bourgoin ◽  
Nikolay Gigov ◽  
Brendon L. Higgins ◽  
Zhizhong Yan ◽  
Evan Meyer-Scott ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution

scholarly journals Device-independent quantum key distribution with random key basis

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
René Schwonnek ◽  
Koon Tong Goh ◽  
Ignatius W. Primaatmaja ◽  
Ernest Y.-Z. Tan ◽  
Ramona Wolf ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Bell Inequality ◽  
Key Distribution ◽  
Theory And Practice ◽  
Information Theoretic ◽  
Information Theoretic Security ◽  
Experimental Parameters ◽  
Secret Keys ◽  
Simple Variant ◽  
First Time

AbstractDevice-independent quantum key distribution (DIQKD) is the art of using untrusted devices to distribute secret keys in an insecure network. It thus represents the ultimate form of cryptography, offering not only information-theoretic security against channel attacks, but also against attacks exploiting implementation loopholes. In recent years, much progress has been made towards realising the first DIQKD experiments, but current proposals are just out of reach of today’s loophole-free Bell experiments. Here, we significantly narrow the gap between the theory and practice of DIQKD with a simple variant of the original protocol based on the celebrated Clauser-Horne-Shimony-Holt (CHSH) Bell inequality. By using two randomly chosen key generating bases instead of one, we show that our protocol significantly improves over the original DIQKD protocol, enabling positive keys in the high noise regime for the first time. We also compute the finite-key security of the protocol for general attacks, showing that approximately 108–1010 measurement rounds are needed to achieve positive rates using state-of-the-art experimental parameters. Our proposed DIQKD protocol thus represents a highly promising path towards the first realisation of DIQKD in practice.

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