Multiuser quantum cryptography on optical networks. Quantum cryptography permits the transmission of secret information whose security is guaranteed by the uncertainty principle. Quantum networks form an important element of quantum computing and quantum. Quantum cryptography on multiuser optical fibre networks. Telefonica, huawei and upm perform a groundbreaking field trial. Here i introduce a practical scheme for multiuser quantum cryptography, and demonstrate its operation on an optical fibre network. This paper describes recent progress at bt laboratories in the development of practical optical fiberbased quantum cryptography systems.
Quantum cryptography on optical fiber networks sciencedirect. As a countermeasure, the quantum key distribution systems are the best option. In addition, some qkd systems use a graphics processing unit gpu as a. However, the presence of power splitters in the commonly. 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.
The ability to use new network technologies like sdn, designed to increase the flexibility of the network, together with new qkd technology is. Quantum networking networks and telecommunications. Research on automatically switched optical network security. Research on automatically switched optical network security based on quantum key distribution. Telefonica, huawei trial quantum cryptography on optical network. We show how the existing techniques can be extended to allow multiuser secure key distribution on optical networks.
All secure communications are based on the use of cryptography. Quantum secured gigabit optical access networks arxiv. Optical networks have the advantage of being able to reuse existing optical fiber. Like most serious books on quantum computing and networking, it is heavy on the math and not for the faint of heart. Protecting our future networks with quantum mechanics by simon j. Gigahertz clocked quantum key distribution in passive optical. Pdf multiuser quantum cryptography on optical networks. Quantum key distribution qkd over softwaredefined optical. These developments include interferometric systems operating in the 1. To establish a secure communication channel, it is necessary to distribute between two users a key which allows safe encryption and decryption of messages. Quantum cryptography is a new method for secret communications offering the ultimate security assurance of the inviolability of a law of nature.
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. Quantum cryptography has been shown to be an effective technology for the secure distribution of keys on pointtopoint optical links. Noticeably, quantum key distribution qkd is now being considered as a secure. Demonstration of an active quantum key distribution network. Qkd network allows multiple users to generate and share secure quantum keys. Abstracttwo multiuser approaches to fiberbased quantum key distribution. Multiuser quantum cryptography on optical networks article pdf available in journal of modern optics 426. Optical network security is attracting increasing research interest.