Experimental investigation of quantum key distribution through transparent optical switch elements

Toliver, P.; Runser, R.J.; Chapuran, T.E.; Jackel, J.; Banwell, T.; Goodman, M.S.; Hughes, Richard; Peterson, C. G.; Derkacs, Derek; Nordholt, J. E.; Mercer, L.; McNown, S.; Goldman, Alberto; Blake, Jeff

doi:10.1109/lpt.2003.818687

Cited by 74 publications

(34 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Switching time and QKD link initialization are the main overhead factors. Optical switches have been investigated in QKD systems [Toliver, et al, 2003], and demonstrated by BBN Technologies [Elliott, et al, 2005] and NIST but only the NIST system is fast enough to support a one-time pad cipher for video. A potential solution to extend QKD over longer distances is to chain together a number of QKD links.…”

Section: Quantum Network and A Surveillance Video Applicationmentioning

confidence: 99%

An Application of Quantum Networks for Secure Video Surveillance

Mink¹,

Ma²,

Hershman³

et al. 2011

Video Surveillance

View full text Add to dashboard Cite

Section: Quantum Network and A Surveillance Video Applicationmentioning

confidence: 99%

An Application of Quantum Networks for Secure Video Surveillance

Mink¹,

Ma²,

Hershman³

et al. 2011

Video Surveillance

View full text Add to dashboard Cite

“…Based on the passive beam splitter, Townsend et al presented and realized the first QKD network [17,18]. And since then, researchers have devised and developed an impressive collection of network architectures for QKD [19][20][21][22][23][24][25][26][27][28][29][30][31]. Combined with increasingly mature QKD devices, these developments enabled QKD networks to be deployed over real-world telecommunication networks.…”

Section: Introductionmentioning

confidence: 99%

Field and long-term demonstration of a wide area quantum key distribution network

Wang¹,

Chen²,

Yin³

et al. 2014

Opt. Express

253

139

View full text Add to dashboard Cite

Abstract:A wide area quantum key distribution (QKD) network deployed on communication infrastructures provided by China Mobile Ltd. is demonstrated. Three cities and two metropolitan area QKD networks were linked up to form the Hefei-Chaohu-Wuhu wide area QKD network with over 150 kilometers coverage area, in which Hefei metropolitan area QKD network was a typical full-mesh core network to offer all-to-all interconnections, and Wuhu metropolitan area QKD network was a representative quantum access network with point-to-multipoint configuration. The whole wide area QKD network ran for more than 5000 hours, from 21 December 2011 to 19 July 2012, and part of the network stopped until last December. To adapt to the complex and volatile field environment, the Faraday-Michelson QKD system with several stability measures was adopted when we designed QKD devices. Through standardized design of QKD devices, resolution of symmetry problem of QKD devices, and seamless switching in dynamic QKD network, we realized the effective integration between point-to-point QKD techniques and networking schemes. 449-449 (1995). 4. R. J. Hughes, G. G. Luther, G. L. Morgan, C. G. Peterson, and C. Simmons, "Quantum cryptography over underground optical fibers," Lecture Notes in Computer Science, 1109, 329-342 (1996).5. P. D. Townsend, "Simultaneous quantum cryptographic key distribution and conventional data transmission over installed fibre using wavelength-division multiplexing," Electron. Lett. 33, 188-190 (1997

show abstract

“…While point-to-point connections are suitable to form a backbone quantum core network to bridge long distances, they are less suitable to provide the last-mile service needed to give a multitude of users access to this QKD infrastructure. Reconfigurable optical networks based on optical switches or wavelength-division multiplexing have been suggested to achieve more flexible network structures [3,[9][10][11][12], however, they also require the installation of a full QKD system per user, which is prohibitively expensive for many applications.…”

mentioning

confidence: 99%

A quantum access network

Fröhlich

Dynes

Lucamarini

et al. 2013

Nature

278

219

View full text Add to dashboard Cite

The theoretically proven security of quantum key distribution (QKD) could revolutionise how information exchange is protected in the future [1,2]. Several field tests of QKD have proven it to be a reliable technology for cryptographic key exchange and have demonstrated nodal networks of point-to-point links [3][4][5]. However, so far no convincing answer has been given to the question of how to extend the scope of QKD beyond niche applications in dedicated high security networks. Here we show that adopting simple and cost-effective telecommunication technologies to form a quantum access network can greatly expand the number of users in quantum networks and therefore vastly broaden their appeal. We are able to demonstrate that a high-speed single-photon detector positioned at a network node can be shared between up to 64 users for exchanging secret keys with the node, thereby significantly reducing the hardware requirements for each user added to the network. This point-to-multipoint architecture removes one of the main obstacles restricting the widespread application of QKD. It presents a viable method for realising multi-user QKD networks with resource efficiency and brings QKD closer to becoming the first widespread technology based on quantum physics.In a nodal QKD network multiple trusted repeaters are connected via point-to-point links between a quantum transmitter (Alice) and a quantum receiver (Bob). These point-to-point links can be realised with long-distance optical fibres, and in the future might even utilize ground to satellite communication [6][7][8]. While point-to-point connections are suitable to form a backbone quantum core network to bridge long distances, they are less suitable to provide the last-mile service needed to give a multitude of users access to this QKD infrastructure. Reconfigurable optical networks based on optical switches or wavelength-division multiplexing have been suggested to achieve more flexible network structures[3, 9-12], however, they also require the installation of a full QKD system per user, which is prohibitively expensive for many applications.Giving a multitude of users access to the nodal QKD network requires point-to-multipoint connections. In modern fibre-optic networks point-to-multipoint connections are often realized passively using components such as optical power splitters [13]. Single photon QKD with the sender positioned at the network node and the receiver at the user premises[14] lends itself naturally to a passive multi-user network (see Fig. 1a). However, this downstream implementation has two major shortcomings. Firstly, every user in the network requires a single photon detector, which are often expensive and difficult to operate. And secondly, it is not possible to deterministically address a user. All detectors therefore have to operate at the same speed as the transmitter in order not to miss photons, which means most of the detector bandwidth is unused.Here, we show that both problems associated with a downstream implementation can be overcome ...

show abstract

Experimental investigation of quantum key distribution through transparent optical switch elements

Cited by 74 publications

References 9 publications

An Application of Quantum Networks for Secure Video Surveillance

An Application of Quantum Networks for Secure Video Surveillance

Field and long-term demonstration of a wide area quantum key distribution network

A quantum access network

Contact Info

Product

Resources

About