scholarly journals Tight finite-key security for twin-field quantum key distribution

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Guillermo Currás-Lorenzo ◽  
Álvaro Navarrete ◽  
Koji Azuma ◽  
Go Kato ◽  
Marcos Curty ◽  
...  
Keyword(s):  
Data Security ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Communication Problems ◽  
Experimental Implementation ◽  
Rate Versus ◽  
Point To Point ◽  
Reliable Solution ◽  
Term Data

AbstractQuantum key distribution (QKD) offers a reliable solution to communication problems that require long-term data security. For its widespread use, however, the rate and reach of QKD systems must be improved. Twin-field (TF) QKD is a step forward toward this direction, with early demonstrations suggesting it can beat the current rate-versus-distance records. A recently introduced variant of TF-QKD is particularly suited for experimental implementation, and has been shown to offer a higher key rate than other variants in the asymptotic regime, where users exchange an infinite number of signals. Here, we extend the security of this protocol to the finite-key regime, showing that it can overcome the fundamental bounds on point-to-point QKD with ~1010 transmitted signals. In many practical regimes of interest, our analysis offers higher key rates than those of alternative variants. Moreover, some of the techniques we develop are applicable to the finite-key analysis of other QKD protocols.

The Status of Quantum-Key-Distribution-Based Long-Term Secure Internet Communication

2019 ◽  
pp. 1-1 ◽  
Author(s):  
Matthias Geihs ◽  
Oleg Nikiforov ◽  
Denise Demirel ◽  
Alexander Sauer ◽  
Denis Butin ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Internet Communication ◽  
The Status

scholarly journals Experimental Implementation of Non-Gaussian Attacks on a Continuous-Variable Quantum-Key-Distribution System

2007 ◽  
Vol 98 (3) ◽  
Author(s):  
Jérôme Lodewyck ◽  
Thierry Debuisschert ◽  
Raúl García-Patrón ◽  
Rosa Tualle-Brouri ◽  
Nicolas J. Cerf ◽  
...  
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Experimental Implementation ◽  
Non Gaussian

A Proposed Architecture for Key Management Schema in Centralized Quantum Network

2017 ◽  
pp. 997-1021 ◽  
Author(s):  
Ahmed Farouk ◽  
Mohamed Elhoseny ◽  
Josep Batle ◽  
Mosayeb Naseri ◽  
Aboul Ella Hassanien
Keyword(s):  
Key Management ◽  
Quantum Key Distribution ◽  
Communication Systems ◽  
Key Distribution ◽  
Symmetric Encryption ◽  
Application Range ◽  
Distribution Centre ◽  
Management Scheme ◽  
Single Host ◽  
Point To Point

Most existing realizations of quantum key distribution (QKD) are point-to-point systems with one source transferring to only one destination. Growth of these single-receiver systems has now achieved a reasonably sophisticated point. However, many communication systems operate in a point-to-multi-point (Multicast) configuration rather than in point-to-point mode, so it is crucial to demonstrate compatibility with this type of network in order to maximize the application range for QKD. Therefore, this chapter proposed architecture for implementing a multicast quantum key distribution Schema. The proposed architecture is designed as a Multicast Centralized Key Management Scheme Using Quantum Key Distribution and Classical Symmetric Encryption. In this architecture, a secured key generation and distribution solution has been proposed for a single host sending to two or more (N) receivers using centralized Quantum Multicast Key Distribution Centre and classical symmetric encryption.

A Quantum Key Distribution Technique Using Quantum Cryptography

2021 ◽  
pp. 890-898
Author(s):  
Meenakshi Sharma ◽  
Sonia Thind
Keyword(s):  
Quantum Cryptography ◽  
Data Security ◽  
Quantum Key Distribution ◽  
Quantum Physics ◽  
Key Distribution ◽  
Current Data ◽  
Important Application ◽  
The Internet ◽  
Sensitive Data ◽  
Unauthorized Access

In order to protect and secure the sensitive data over the internet, the current data security methods typically depend on the cryptographic systems. Recent achievements in quantum computing is a major challenge to such cryptography systems. In this way, the quantum key distribution (QKD) technique evolves as a very important technique which gives un-conditional data security. This technique is based on the laws of quantum physics for its security. This article gives a detailed description of the QKD technique. This technique secures the encryption key delivery between the two authenticated parties from the unauthorized access. In the next phase, quantum cryptography model is discussed. Finally, some important application areas and limitations of this technology are be discussed.

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