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Journal of Optoelectronics·laser

Principles,Applications and State-of-the-arts of Quantum Cryptography

Chen Kang-sheng

Published Jan 1, 2001• 0 citations
OpenAlex

Abstract

Quantum cryptography,which is based on fundamental physical principles,has been proved to be an effective technique for secure key distribution.In this paper,the authors introduce the fundamental theory of quantum cryptography,then discussed the three main schemes for quantum cryptography and their key distribution policies respectively.Recent improvements in theory and experiment are discussed,and the existng problems and developing directions are also pointed out.For its application potential,it's suggested to construct experimental system of quantum cryptography in China.

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Quantum cryptography,which is based on fundamental physical principles,has been proved to be an effective technique for secure key distribution.In this paper,the authors introduce the fundamental theory of quantum cryptography,then discussed the three main schemes for quantum cryptography and their key distribution policies respectively.Recent improvements in theory and experiment are discussed,and the existng problems and developing directions are also pointed out.For its application potential,it's suggested to construct experimental system of quantum cryptography in China.
Quantum cryptography is a quickly developing field that brings direct applications of fundamentals of quantum theory. In this paper we present a brief review of the tasks and problems faced by classical cryptography and we point out the benefits of quantum cryptography to their solution. An overview of the experimental achievements and an outline of the principle of quantum key distribution are given. Various experimental approaches are compared. The quantum cryptographic device built by the authors is described and its use for mutual identification system is presented.
With the development of computer and communication technology, many people pay close attention to information security technology. Considering that the current encryption has many malpractices, some persons turn attention to quantum cryptography. Quantum Key Distribution is based on the principles of Heisenberg's uncertainty which guarantees that no eavesdropper can escape detection. According to this principle, this paper makes a study of the quantum cryptography technique, discusses the course of quantum key production and distribution in the quantum communication and the principle of quantum key distribution protocol in the communication by combining the application of quantum key protocol in the communication network. Current experimental progress on this aspect is introduced, existing problems are analyzed and some constructive suggestions are proposed. Finally, the developing trend for the theory of quantum password is prospected.
Quantum cryptography (or quantum key distribution) is a state-of-the-art technique that exploits properties of quantum mechanics to guarantee the secure exchange of secret keys. This 2006 text introduces the principles and techniques of quantum cryptography, setting it in the wider context of cryptography and security, with specific focus on secret-key distillation. The book starts with an overview chapter, progressing to classical cryptography, information theory (classical and quantum), and applications of quantum cryptography. The discussion moves to secret-key distillation, privacy amplification and reconciliation techniques, concluding with the security principles of quantum cryptography. The author explains the physical implementation and security of these systems, enabling engineers to gauge the suitability of quantum cryptography for securing transmission in their particular application. With its blend of fundamental theory, implementation techniques, and details of recent protocols, this book will be of interest to graduate students, researchers, and practitioners in electrical engineering, physics, and computer science.
Quantum cryptography is a significant development in secure communication that uses quantum mechanics concepts to improve data security against developing attacks. By utilizing phenomena such as quantum superposition and entanglement, it provides robust methods such as quantum key distribution (QKD) that provide key security against eavesdropping. This review begins with the underlying concepts of quantum computing, which support quantum cryptography techniques. This research study provides a brief comparison of classical computing with quantum computing and technological developments through various research and possible consequences. Then it investigates fundamental principles of quantum mechanics such as, Heisenberg uncertainty principle and photon polarization. The chapter then explores the main quantum cryptography concepts such as QKD, emphasizing its theoretical foundations, Shor’s and Grover’s algorithm effects on traditional algorithms, and programming tools which can be used in real-world applications.
Quantum cryptography based on quantum physics has been proved to be an effective means of key security allocation in secure communication. This paper introduces you to the basic principle of quantum cryptography on the basis of classical cryptography, and then presents several methods of quantum cryptography. It expounds the main research on EPR key distribution mechanism based on entanglement, according to quantum cryptography communication history and the existing problems. Lastly the advanced prospect and research aspect were predicted.