Information theoretically secure, enhanced Johnson noise based key distribution over the smart grid with switched filters

PLoS One. 2013 Jul 25;8(7):e70206. doi: 10.1371/journal.pone.0070206. Print 2013.


We introduce a protocol with a reconfigurable filter system to create non-overlapping single loops in the smart power grid for the realization of the Kirchhoff-Law-Johnson-(like)-Noise secure key distribution system. The protocol is valid for one-dimensional radial networks (chain-like power line) which are typical of the electricity distribution network between the utility and the customer. The speed of the protocol (the number of steps needed) versus grid size is analyzed. When properly generalized, such a system has the potential to achieve unconditionally secure key distribution over the smart power grid of arbitrary geometrical dimensions.

MeSH terms

  • Algorithms*
  • Computer Communication Networks
  • Electric Power Supplies / statistics & numerical data*
  • Electricity*
  • Humans
  • Models, Statistical*

Grant support

The authors have no support or funding to report.