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news:20131105-1356 [2013/11/05 13:57]
bkorzh
news:20131105-1356 [2019/03/16 19:54] (current)
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 ====== Quantum Physics and Relativity: Communication for the Mistrustful ====== ====== Quantum Physics and Relativity: Communication for the Mistrustful ======
  
-{{:​news:​bit_comm.png?​nolink&​300 | }} A recent collaborative project between our group, the University of Cabridge ​and the National University of Singapore has succeeded in experimentally demonstrating the feasibility of secure bit commitment and has been published in the [[:​publications:​bib:​lunghi2013a | Physics Review Letters]]. This protocol allows at individual to lock away, or in other words commit to, some information and reveal it at some time later, without the possibility of changing it. This could be used for a fair voting or bidding system where no one should know anyone else intent before a specified time. Full security is guaranteed by exchanging quantum information between the communicating parties in addition to the exchange of classical information with distant agents, which gives rise to a secure commitment time thanks to the laws of special relativity. In our case the agents were placed in Geneva and Singapore allowing for a commitment time close to the maximum achievable on the surface of the earth. Further details of our work have been discussed in a [[http://​physics.aps.org/​articles/​v6/​119| Physics Focus]] article published by the American Physical Society.+{{:​news:​bit_comm.png?​nolink&​300 | }} A recent collaborative project between our group, the University of Cambridge ​and the National University of Singapore has succeeded in experimentally demonstrating the feasibility of secure bit commitment and has been published in the [[:​publications:​bib:​lunghi2013a | Physics Review Letters]]. This protocol allows at individual to lock away, or in other words commit to, some information and reveal it at some time later, without the possibility of changing it. This could be used for a fair voting or bidding system where no one should know anyone else intent before a specified time. Full security is guaranteed by exchanging quantum information between the communicating parties in addition to the exchange of classical information with distant agents, which gives rise to a secure commitment time thanks to the laws of special relativity. In our case the agents were placed in Geneva and Singapore allowing for a commitment time close to the maximum achievable on the surface of the earth. Further details of our work have been discussed in a [[http://​physics.aps.org/​articles/​v6/​119| Physics Focus]] article published by the American Physical Society.
  
 {{tag> bit commitment relativity PRL}} {{tag> bit commitment relativity PRL}}