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Modeling of Quantum Key Distribution System for Secure Information Transfer

Konstantin E. Rumyantsev, Голубчиков Дмитрий Михайлович

Published Aug 7, 2013• 0 citations
Publisher

Abstract

This chapter is an analysis of commercial quantum key distribution systems. Upon analysis, the generalized structure of QKDS with phase coding of a photon state is presented. The structure includes modules that immediately participate in the task of distribution and processing of quantum states. Phases of key sequence productions are studied. Expressions that allow the estimation of physical characteristics of optoelectronic components, as well as information processing algorithms impact to rate of key sequence production, are formed. Information security infrastructure can be utilized, for instance, to formulate requirements to maximize tolerable error level in quantum channel with a given rate of key sequence production.

DOI
10.4018/978-1-4666-2208-1.ch015

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This chapter is an analysis of commercial quantum key distribution systems. Upon analysis, the generalized structure of QKDS with phase coding of a photon state is presented. The structure includes modules that immediately participate in the task of distribution and processing of quantum states. Phases of key sequence productions are studied. Expressions that allow the estimation of physical characteristics of optoelectronic components, as well as information processing algorithms impact to rate of key sequence production, are formed. Information security infrastructure can be utilized, for instance, to formulate requirements to maximize tolerable error level in quantum channel with a given rate of key sequence production.
This chapter is an analysis of commercial quantum key distribution systems. Upon analysis, the generalized structure of QKDS with phase coding of a photon state is presented. The structure includes modules that immediately participate in the task of distribution and processing of quantum states. Phases of key sequence productions are studied. Expressions that allow the estimation of physical characteristics of optoelectronic components, as well as information processing algorithms impact to rate of key sequence production, are formed. Information security infrastructure can be utilized, for instance, to formulate requirements to maximize tolerable error level in quantum channel with a given rate of key sequence production.
In this paper discusses the issues of protection against unauthorized access to information and telecommunication systems using quantum cryptography methods, providing a high security for streaming information. The basic procedures for channel key distribution and coding photons in a quantum communication channel with quantum key distribution are described. A comparative analysis of key distribution schemes using phase coding is carried out and schemes benefits and disadvantages are explained. Possible options of random basis choosing for systems with quantum key distribution are considered. Computer simulation of quantum key distribution process has been carried out, which makes it possible to reproduce, visualize quantum key distribution process and investigate the effect of errors in the quantum channel on the key generation rate. The resulting dependence of the key generation rate on the number of errors in the key.
A review of the existing commercial quantum key distribution systems was conducted. The principle of operation of a fiber-optic quantum key distribution system with phase coding of photon states is described. The operation of the system in the mode of forming quantum keys is described. The synchronization process is analyzed, which consists in detecting a time interval with an optical pulse. The basic properties and parameters of auto-compensation quantum key distribution system are reviewed. The images of the current stand of the quantum-cryptographic network are given. The stand includes two stations of the quantum key distribution system with phase coding of photon states, two servers and data transmission channels. It is shown that the formation of a quantum key in the experiment is carried out at a rate of 500 bits per second. The length of the quantum communication channel in the experiment is 24 km. In this case, the quantum channel consists of a conventional single-mode optical fiber. Trends in the development of quantum key distribution systems, as well as trends in the development of protocols for quantum cryptography was conducted.
This paper investigates the enhancement of Quantum Key Distribution (QKD) protocols utilizing the principles of information theory. Traditional QKD protocols often rely on simplified models and assumptions, leading to potential security vulnerabilities. We propose a framework for strengthening these protocols by rigorously applying information-theoretic concepts, specifically focusing on quantifying information rates, channel capacities, and the impact of noise. This work introduces a refined model incorporating error correction codes and explores methods for optimizing key rates while maintaining robust security. The core claim is that leveraging information theory's theoretical foundations can significantly improve the security and efficiency of QKD protocols. Specifically, we examine the trade-offs between key rate, key agreement time, and security level, offering a pathway towards more practical and secure QKD implementations. The analysis demonstrates the critical role of precise information modeling in mitigating potential attacks and enhancing the overall performance of QKD systems. ---
Quantum Key Distribution (QKD) systems are a novel technology that exploits the laws of quantum mechanics to generate and distribute unconditionally secure cryptographic keys between two geographically separated parties. They are suitable for use in applications where high levels of secrecy are required, such as banking, government, and military environments. In this paper, we describe the development of a module-based QKD simulation framework that facilitates the modeling of QKD post-processing functionalities. We highlight design choices made to improve upon an initial design, which included the segmentation of functionalities associated with various phases of QKD post-processing into discrete modules implementing abstract interfaces. In addition, communication between modules was improved by implementing observers to share data, and a specific strategy for dealing with post-processing synchronization and configuration activities was designed. Collectively, these improvements resulted in a significantly enhanced analysis capability to model and study the security and performance characteristics associated with specific QKD system designs.
Quantum protocols for generating shared secret keys represent an effective method of ensuring secure information transmission using quantum communication channels. However, they are limited in scalability due to the physical constraints of quantum channels, which necessitates the use of classical communication channels for exchanging information between participants. This leads to the necessity of developing security threat models and network protection, especially in the case of hybrid networks, where quantum channels are used alongside classical ones. The peculiarity of constructing quantum key distribution protocols is associated with the costliness of implementation and implies the inevitable use of classical communication channels for key distribution. This paper addresses the task of ensuring the security of communication between subscribers not directly connected by quantum channels, through intermediary nodes, and analyzes threats from internal and external adversaries. Special attention is paid to situations where both types of adversaries have information about the processes and protocols in the network. The paper examines widely used key distribution protocols employed in practice. It describes the main security requirements applied to key distribution protocols, and presents the results of an analysis of the compliance of the discussed protocols with these requirements