Secure Communication based on Quantum Cryptography: Difference between revisions

Revision as of 16:33, 22 November 2009

Revision as of 11:49, 23 November 2009

Line 3:

On October 8, 2008 SECOQC was launched in Vienna <ref>[http://news.bbc.co.uk/1/hi/sci/tech/7661311.stm BBC]</ref><ref>[http://news.yahoo.com/s/afp/20081008/sc_afp/sciencequantumphysicsittelecomaustria Yahoo news]</ref>.

== Limitations of classical Quantum Cryptography ==

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 1:1 connection. So the number of links will increase N(N-1)/2 as N 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 this issues, SECOQC was started.

== Brief architecture of SECOQC network ==

SECOQC network architecture can by divided by two parts. Trusted private network and quantum network consisted with QBBs(Quantum Back Bone). Private network is conventional network with end-nodes and a QBB. QBB provides quantum channel communication between QBBs. QBB is consisted with a number of QKD devices that are connected with other QKD devices in 1-to-1 connection.

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

== See also ==

* [[Quantum cryptography]]

== References ==

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

* 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

==References==