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Xinxi wangluo anquan

The quantum privacy communication searches learns

Liu Yu

Published Jan 1, 2009• 1 citation
OpenAlex

Abstract

Quantum communication is a new interdisciplinary research field which combines the classical communication theories and quantum mechanics,and is the only theory,widely acknowledged by researchers worldwide,that can realize unconditionally secured communication.This essay analyzes the security weaknesses of the existing cryptosystems,reviews the concept of quantum cryptosystem,examines in details the complete process of the most typical quantum security key distribution protocol-the BB84 protocol-and analyzes its security.

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Quantum communication is a new interdisciplinary research field which combines the classical communication theories and quantum mechanics,and is the only theory,widely acknowledged by researchers worldwide,that can realize unconditionally secured communication.This essay analyzes the security weaknesses of the existing cryptosystems,reviews the concept of quantum cryptosystem,examines in details the complete process of the most typical quantum security key distribution protocol-the BB84 protocol-and analyzes its security.
Cryptography was introduced to prevent a third party from accessing and learning the contents of private messages sent during a communication process. Quantum Cryptography looks promising to provide a new level of secure communication by applying quantum mechanics concepts to cryptography. The research in the domain emphasizes that such systems can detect eavesdropping and ensure that it does not occur at all. This paper reviews the existing state of quantum cryptography, which includes an introduction to quantum computing and quantum key distribution algorithm, special attention is given to the implementation and working of the BB84 Protocol. It also provides a glimpse of post-quantum cryptography.
Data protection and information security have been the essence of communication in today's digital era. Authentication and secrecy of secure communication are achieved using key-based cryptographic primitives; the security of which significantly relies upon the underlying computationally complex mathematics. Moreover, these existing cryptographic primitives are considered to be non-deterministic on the basis of the existing computational capabilities. However, the considerable advancements in the development of quantum computers have significantly enhanced parallel computations; thereby, posing a great threat to these existing encryption primitives. Thus, in the future, the physical manifestation of a large successful quantum computer is likely to break all the existing public-key encryption algorithms in no time. This has led to a remarkable surge of interest in propelling quantum mechanics into existence; subsequently, leading cryptographers to research various viable domains to offer quantum-resistant secure communications. Resultantly, quantum cryptography/quantum key distribution has emerged as a futuristic replacement for classical cryptography as it offers unconditionally secure communication along with the inherent detection of any unintended user. Thus, keeping in view the significance of this relatively newer domain of cryptography, this research focuses on presenting a consolidated review of the various Quantum Key Distribution (QKD) protocols. A comparative analysis of the working mechanism of the prominent QKD protocols is presented along with an overview of the various emerging trends that have been proposed to optimize the implementational efficiency of the BB84 protocol.
Today's Classical cryptographic algorithms will fail against the quantum cryptosystems. In this paper, Security protocols are reviewed with analysis of intercept-resend, faked-state and light pulse attacks and eavesdropper strategies to gain the information transferred in between communication channel. The quantum cryptography is providing absolute security against the above stated attacking environment. That is the reason for using the concepts of quantum mechanics with cryptographic algorithms to achieve the utmost security. This paper is focusing on review to the key distribution techniques used for protecting the communication. We found that the communication is successfulif we use privacy amplification, authentication, and Bell's inequalities.
The security of classical cryptography based on computational complexity assumptions has been severely challenged with the rapid development of quantum computers and quantum algorithms. Quantum cryptography, which offers unconditional security based on some principles of quantum mechanics, has become a significant branch and hotspot in the field of modern cryptography research. In this paper, we review the research and development of several important and well-studied branches of quantum cryptography in terms of theory and experiment, including quantum key distribution, quantum secret sharing, quantum secure direct communication, quantum signature, and quantum private query. We also briefly review the research and development of some other branches which are currently in the stage of theoretical research but receive widespread concern from academia, including quantum private comparison, quantum anonymous voting, quantum secure multi-party summation, quantum sealed-bid auction, quantum public key cryptosystem, quantum key agreement, quantum dialogue, and quantum identity authentication. In addition, we discuss some open issues and future research directions for the branches referred to above.
This paper presents a novel communication protocol design leveraging the concept of quantum entropy. Current communication protocols predominantly rely on classical information theory, often lacking the inherent advantages offered by quantum mechanics. This protocol aims to enhance both communication efficiency and security by encoding and transmitting information based on quantum entropy. The core mechanisms involve quantum entropy-based encoding, entropy-assisted encryption and decryption, and the utilization of quantum entanglement for quantum key distribution (QKD). Specifically, the protocol employs a modified BB84 protocol, incorporating entropy-rate estimation to improve key generation and security against eavesdropping attacks. The theoretical analysis demonstrates the protocol's potential to achieve higher key rates and enhanced security levels compared to traditional protocols. Mathematical formulations detail the entropy calculations and security proofs used within the protocol. The design offers a promising approach for secure quantum communication in future networks.
Nowadays security in communication is increasingly important to the network communication because many categories of data are required restriction on authorization of access, modify, delete and insert.Quantum cryptography is one of the solutions that use property of polarization to ensure that transmitted data is not tampered.The research paper provides the mechanism that enhances the data security in quantum cryptography during exchange of information.In first phase detailed explanation of Quantum key distribution's BB84 protocol is given.BB84 protocol is used as the basis for the mechanism.In next phase the proposed mechanism is explained.The proposed mechanism combines BB84 protocol at two levels, from sender to receiver and then from receiver to sender.Moreover, a logic circuit is used to combine the bits hence to reduce the probability of eavesdropping.The key obtained can be used to exchange the information securely further it can help in encryption and decryption of crucial data.Double level BB84 mechanism will help in information reconciliation as well as privacy amplification.In future the proposed mechanism will be very beneficial where unconditional security is required during key and other secret information exchange