Secure Communication based on Quantum Cryptography: Difference between revisions

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