Secure Communication based on Quantum Cryptography: Difference between revisions

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'''Secure Communication based on Quantum Cryptography''' ('''SECOQC''') is a project that aims to develop [[quantum cryptography]] (see there for further details). The [[European Union]] decided in 2004 to invest 11 million [[Euro|EUR]] in the project as a way of circumventing [[espionage]] attempts by [[ECHELON]]. [[Christian Monyk]], the coordinator of SECOQC, said people and organizations in [[Austria]], [[Belgium]], the [[United Kingdom]], [[Canada]], the [[Czech Republic]], [[Denmark]], [[France]], [[Germany]], [[Italy]], [[Russia]], [[Sweden]], and [[Switzerland]] would participate in the project.

On October 8, 2008 SECOQC was launched in Vienna.<ref>[{{cite news|url=http://news.bbc.co.uk/1/hi/sci/tech/7661311.stm|title='Unbreakable' encryption unveiled|website=BBC]</ref><ref>[https://news.yahoo.com/s/afp/20081008/sc_afp/sciencequantumphysicsittelecomaustria YahooNews|date=9 news]October 2008}}</ref>

== Limitations of classical Quantumquantum Cryptographycryptography ==

[[Quantum cryptography]], usually known as [[quantum key distribution]] (QKD) provides powerful security. But it has some limitations. Following no-cloning theorem, QKD only can provide 1:1one-to-one connectionconnections. So the number of links will increase <math>N(N-1)/2</math> as <math>N</math> represents the number of nodes. If a node wants to participate into the QKD network, it will cause some issues like constructing quantum communication line. To overcome these issues, SECOQC was started.

== Brief architecture of SECOQC network ==

SECOQC network architecture can be divided into two parts: trusted private networks and quantum networks connected via QBBs (Quantumquantum Backbonesbackbones). The private networks are conventional networks with end-nodes and a QBB. Each QBB enables quantum channel communication with another QBB and consists of a number of QKD devices that are connected with other QKD devices over 1one-to-1one connections.

From this, SECOQC can provide easier registration of new end-nodenodes in a QKD network, and quick recovery from threats on quantum channel links.

== See also ==

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== References ==

* Andreas Poppe, Momtchil Peev, Oliver Maurhart, "Outline of the SECOQC Quantum-Key-Distribution Network in Vienna", Apr 2008, International Journal of Quantum Information

* Peev M., Pacher C., Alleaume, R., Happe A., Lorunser T., Poppe A., Themel T., Zeilinger A, "The SECOQC quantum key distribution network in Vienna", July 2009, New Journal of Physics, Volume 11

* Dianati, M. Alleaume, R., "Transport Layer Protocols for the Secoqc Quantum Key Distribution (QKD) Network, Local Computer Networks", 2007. LCN 2007. 32nd IEEE Conference on

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== External links ==

* [http://www.secoqc.net/ Homepage of SECOQC]

* [https://web.archive.org/web/20040603140332/http://security.itworld.com/4361/040517euechelon/page_1.html E.U. seeks quantum cryptography response to Echelon] [[ITworld]]