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We present an overview of quantum key distribution (QKD), a secure key exchange method based on the quantum laws of physics rather than computational complexity. We also provide an overview of the two most widely used commodity security…

Cryptography and Security · Computer Science 2010-07-15 Alan Mink , Sheila Frankel , Ray Perlner

Quantum Key Distribution (QKD) is a technology that ensures secure communication by leveraging the principles of quantum mechanics, such as the no-cloning theorem and quantum uncertainty. This chapter provides an overview of this quantum…

Quantum Physics · Physics 2026-02-27 Sebastian Kish , Josef Pieprzyk , Seyit Camtepe

Secure communication makes the widespread use of telecommunication networks and services possible. With the constant progress of computing and mathematics, new cryptographic methods are being diligently developed. Quantum Key Distribution…

Cryptography and Security · Computer Science 2024-08-09 Emir Dervisevic , Amina Tankovic , Ehsan Fazel , Ramana Kompella , Peppino Fazio , Miroslav Voznak , Miralem Mehic

This paper presents a practical solution to the problem of limited bandwidth in Quantum Key Distribution (QKD)- secured communication through using rapidly rekeyed Internet Protocol security (IPsec) links. QKD is a cutting-edge security…

Cryptography and Security · Computer Science 2018-01-08 Stefan Marksteiner , Benjamin Rainer , Oliver Maurhart

Quantum Key Distribution (QKD) offers information-theoretic security against quantum computing threats, but integrating QKD into existing security protocols remains an unsolved challenge due to fundamental mismatches between pre-distributed…

Quantum Key Distribution (QKD) is a means of generating keys between a pair of computing hosts that is theoretically secure against cryptanalysis, even by a quantum computer. Although there is much active research into improving the QKD…

Cryptography and Security · Computer Science 2017-12-08 Piotr K. Tysowski , Xinhua Ling , Norbert Lütkenhaus , Michele Mosca

Data centers are nowadays referred to as the digital world's cornerstone. Quantum key distribution (QKD) is a method that solves the problem of distributing cryptographic keys between two entities, with the security rooted in the laws of…

Quantum Physics · Physics 2023-07-26 Nitin Jain , Ulrich Hoff , Marco Gambetta , Jesper Rodenberg , Tobias Gehring

Quantum key distribution (QKD) promises secure key agreement by using quantum mechanical systems. We argue that QKD will be an important part of future cryptographic infrastructures. It can provide long-term confidentiality for encrypted…

Quantum Physics · Physics 2010-01-25 Douglas Stebila , Michele Mosca , Norbert Lütkenhaus

In recent years, quantum computing technologies have steadily matured and have begun to find practical applications across various domains. One important area is network communication security, where Quantum Key Distribution (QKD) enables…

Cryptography and Security · Computer Science 2026-02-03 Abel C. H. Chen

Quantum Key Exchange (QKE, also known as Quantum Key Distribution or QKD) allows communicating parties to securely establish cryptographic keys. It is a well-established fact that all QKE protocols require that the parties have access to an…

Quantum Physics · Physics 2009-08-11 Kenneth G. Paterson , Fred Piper , Ruediger Schack

In contrast to classical public-key cryptosystems, where the security of encoded messages relies on on computational assumptions, Quantum Key Distribution (QKD) enables two distant parties to establish a shared secret key that, when…

The use of quantum cryptography in everyday applications has gained attention in both industrial and academic fields. Due to advancements in quantum electronics, practical quantum devices are already available in the market, and ready for…

Cryptography and Security · Computer Science 2024-07-29 Pankaj Kumar , Neel Kanth Kundu , Binayak Kar

Quantum Key Distribution (QKD) enables two distant users to exchange a secret key with information-theoretic security, based on the fundamental laws of quantum physics. While it is arguably the most mature application of quantum…

Quantum key distribution (QKD) together with one time pad encoding can provide information-theoretical security for communication. Currently, though QKD has been widely deployed in many metropolitan fiber networks, its implementation in a…

Quantum Physics · Physics 2018-09-10 Qiang Zhang , Feihu Xu , Yu-Ao Chen , Cheng-Zhi Peng , Jian-Wei Pan

Quantum Key Distribution (QKD) stands as a revolutionary approach to secure communication, using the principles of quantum mechanics to establish unbreakable channels. Unlike traditional cryptography, which relies on the computational…

Quantum Physics · Physics 2025-09-09 Alec L. Riso , Karthik Thyagarajan , Connor Whiting , Katherine Jimenez

Quantum Key Distribution (QKD) supports the negotiation and sharing of private keys with unconditional security between authorized parties. Over the years, theoretical advances and experimental demonstrations have successfully transitioned…

Quantum Physics · Physics 2025-11-17 Haoran Zhang , Haotao Zhu , Ruihua He , Yan Zhang , Chao Ding , Lajos Hanzo , Weibo Gao

Quantum mechanics is the current best description of the world as we know it. Experiments have shown that quantum predictions are accurate up ten places of decimal. In quantum cryptography much work has been devoted to the study of Quantum…

Cryptography and Security · Computer Science 2012-09-09 Jaydip Sen , Piyali Roy Chowdhury , Indranil Sengupta

Quantum computing poses significant threats to conventional cryptographic techniques such as RSA and AES, motivating the need for quantum secure communication methods. Quantum Key Distribution (QKD) offers information theoretic security…

Quantum key distribution (QKD) is the first quantum information task to reach the level of mature technology, already fit for commercialization. It aims at the creation of a secret key between authorized partners connected by a quantum…

The advent of quantum computing will pose great challenges to the current communication systems, requiring essential changes in the establishment of security associations in traditional architectures. In this context, the…

Cryptography and Security · Computer Science 2026-03-26 Asier Atutxa , Ane Sanz , Eire Salegi , Gaizka González , Jasone Astorga , Eduardo Jacob
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