Nnmulti-user quantum cryptography on optical networks books

Quantum networks form an important element of quantum computing and quantum. Quantum key distribution qkd over softwaredefined optical. Quantum cryptography has been demonstrated using standard telecommunication fibres linking single pairs of users 48, but practical implementations will require communication networks with many users 9. Quantum cryptography on optical fiber networks sciencedirect. Multiuser quantum cryptography on optical networks article pdf available in journal of modern optics 426. This paper describes recent progress at bt laboratories in the development of practical optical fiberbased quantum cryptography systems. Research on automatically switched optical network security. These developments include interferometric systems operating in the 1.

However, the presence of power splitters in the commonly. Optical networks have the advantage of being able to reuse existing optical fiber. To establish a secure communication channel, it is necessary to distribute between two users a key which allows safe encryption and decryption of messages. All secure communications are based on the use of cryptography. Pdf multiuser quantum cryptography on optical networks. In addition, some qkd systems use a graphics processing unit gpu as a. Research on automatically switched optical network security based on quantum key distribution. Telefonica, huawei trial quantum cryptography on optical network. Multiuser quantum cryptography on optical networks. As a countermeasure, the quantum key distribution systems are the best option. Quantum networking networks and telecommunications. We show how the existing techniques can be extended to allow multiuser secure key distribution on optical networks.

Noticeably, quantum key distribution qkd is now being considered as a secure. Like most serious books on quantum computing and networking, it is heavy on the math and not for the faint of heart. Quantum secured gigabit optical access networks arxiv. Qkd network allows multiple users to generate and share secure quantum keys. Quantum cryptography on multiuser optical fibre networks. Optical network security is attracting increasing research interest. They will play a vital role to scale up the number of users in quantum key distribution qkd networks. The ability to use new network technologies like sdn, designed to increase the flexibility of the network, together with new qkd technology is. Quantum cryptography on optical fiber networks springerlink. Quantum cryptography permits the transmission of secret information whose security is guaranteed by the uncertainty principle. Quantum cryptography is a new method for secret communications offering the ultimate security assurance of the inviolability of a law of nature. Naturevolume 385, pages4749 1997 download citation. Multiuser quantum cryptography networks researchgate.

Protecting our future networks with quantum mechanics by simon j. Telefonica, huawei and upm perform a groundbreaking field trial. Quantum cryptography has been shown to be an effective technology for the secure distribution of keys on pointtopoint optical links. In todays communication networks, the widespread use of optical fiber and passive optical elements allows using quantum cryptography in the current standard optical network infrastructure. Demonstration of an active quantum key distribution network. Townsend, bt laboratories in a series of recent experiments a radical new technique has been demonstrated that could have farreaching consequences for the provision of security on our communications networks. Here i introduce a practical scheme for multiuser quantum cryptography, and demonstrate its operation on an optical fibre network. Gigahertz clocked quantum key distribution in passive optical.